材料力学(专科)-作业二
1.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"悬臂梁</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;",</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AB</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"和</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"BC</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段</span<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"的受力状态分别为</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"( )</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="280" height="138" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX7686.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.纯弯曲,剪切弯曲
B.剪切弯曲,纯弯曲;
C.纯弯曲,纯弯曲
D.剪切弯曲,剪切弯曲
正确答案:——B——
2.[单选题] 均匀性假设认为,材料内部各点相同的是( )
A.应力
B.应变
C.位移
D.力学性质
正确答案:——D——
3.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"1</font<font face="宋体"中属于轴向拉伸杆的是( )</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="480" height="147" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX21503.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.A
B.B
C.C
D.D
正确答案:——D——
4.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"2</font<font face="宋体"(</font<font face="Times New Roman"a</font<font face="宋体")和(</font<font face="Times New Roman"b</font<font face="宋体")两梁抗弯刚度相同,荷载相同,则其( ) 。</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="471" height="122" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX11293.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.内力不同,位移相同
B.内力相同,位移不同
C.内力与位移均相同
D.内力与位移均不相同
正确答案:————
5.[单选题] 截面极惯性矩的量纲是长度的( )
A.一次方
B.二次方
C.三次方
D.四次方
正确答案:————
6.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"单元体的应力状态见图<font face="Times New Roman"1</font<font face="宋体",则主应力σ</font</span<sub<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;vertical-align:sub;"1</span</sub<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"为( )<font face="Times New Roman"MPa</font<font face="宋体"。</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="150" height="75" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX10790.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.90
B.10
C.-90
D.-10
正确答案:————
7.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"1</font<font face="宋体"阶梯形杆受</font</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"P</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"作用,</span<i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AB</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"段为钢,</span<i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"BC</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"段为铝,( )</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="400" height="149" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX943.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.AB段轴力最大
B.BC段轴力最大
C.CD段轴力最大
D.三段轴力—样大
正确答案:————
8.[单选题] 等截面直杆承受轴向拉力F作用,若选用三种不同的截面形状:圆形、正方形、空心圆,`若其他条件相同,比较材料用量,则( )
A.正方形截面最省料
B.圆形截面最省料
C.空心圆截面最省料
D.三者用料相同
正确答案:————
9.[单选题] 长方形截面压杆,b/h=1/2,如果将b改为h后仍为细长杆,临界力Pcr是原来( )
A.2倍
B.4倍
C.8倍
D.16倍
正确答案:————
10.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"1</font<font face="宋体"(</font<font face="Times New Roman"a</font<font face="宋体")和(</font<font face="Times New Roman"b</font<font face="宋体")</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"为</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"材料相同的悬臂梁</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;",</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"(<font face="Times New Roman"a</font<font face="宋体")梁最大挠度是(</font<font face="Times New Roman"b</font<font face="宋体")梁的( )</font</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="355" height="97" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX15397.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="355" height="95" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX15398.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.1/4倍
B.1/2倍
C.2倍
D.4倍
正确答案:————
11.[单选题] 物体受力作用而发生变形,当外力去掉后又能恢复原来形状和尺寸的性质称为( )
A.弹性
B.塑性
C.刚性
D.稳定性
正确答案:————
12.[单选题] 矩形截面梁剪切弯曲时,在横截面的中性轴处正应力和剪应力的特征分别为( )
A.最大,零
B.零,最大
C.最大,最大
D.零,零
正确答案:————
13.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"悬臂梁的</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AC</span</i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段,各个截面上的( )。</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="320" height="135" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX5610.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.剪力相同,弯矩不同
B.剪力不同,弯矩相同
C.剪力和弯矩均相同
D.剪力和弯矩均不同
正确答案:————
14.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"在图<font face="Times New Roman"4</font<font face="宋体"四个剪应力中,剪应力符号位负的是( )</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="672" height="188" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX23618.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.A
B.B
C.C
D.D
正确答案:————
15.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"铸铁简支梁,当其横截面分别按图</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"5</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"两种情况放置时,梁的强度和刚度</span<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"分别</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"( )</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="219" height="105" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX24628.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.相同,不同
B.不同,相同
C.相同,相同
D.不同,不同
正确答案:————
16.[单选题] 应力是内力的( )
A.分布集度
B.矢量和
C.代数和
D.平均值
正确答案:————
17.[单选题] 在下列关于轴向拉压杆轴力的说法中,错误的是( )
A.内力只有轴力
B.轴力的作用线与杆轴重合
C.轴力是沿杆轴作用的外力
D.轴力与杆的横截面和材料无关
正确答案:————
18.[单选题] 塑性较好的材料在交变应力作用下,当危险点的最大应力低于屈服极限时( )
A.无明显塑性变形,且不发生断裂
B.有明显塑性变形,且不发生断裂
C.有明显塑性变形,且发生断裂
D.无明显塑性变形,且发生断裂
正确答案:————
19.[单选题] 卡氏定理只适用于( )
A.静定结构
B.超静定结构
C.线弹性大变形结构
D.线弹性小变形结构
正确答案:————
20.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"3</font<font face="宋体"矩形截面,</font</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"m</span</i<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"-</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"m</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"线以上部分和以下部分对形心轴</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"z</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"的静距的绝对值( )</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="135" height="132" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX2513.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.相等,正负号相同
B.相等,正负号不同
C.不等,正负号相同
D.不等,正负号不同
正确答案:————
21.[单选题] 细长压杆,若长度系数减少一倍,临界压力为原来的( )
A.1/4倍
B.1/2倍
C.2倍
D.4倍
正确答案:————
22.[单选题] 静定杆件的内力与其所在截面相关的参数是( )
A.形状
B.大小
C.位置
D.材料
正确答案:————
23.[单选题] 在等直梁的最大弯矩所在面附近,局部加大横截面尺寸能提高梁的( )
A.强度和刚度
B.强度
C.刚度
D.稳定性
正确答案:————
24.[单选题] 研究梁变形的目的是计算梁的( )
A.正应力
B.刚度
C.稳定性
D.剪应力
正确答案:————
25.[单选题] 自由落体冲击时,当冲击物重量G增加一倍时,若其它条件不变,则被冲击物内的动应力( )
A.不变
B.增加—倍
C.增加不足—倍
D.增加—倍以上
正确答案:————
26.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"工字钢的一端固定、一端自由,自由端受集中荷载</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"P</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"的作用。若梁的横截面和<font face="Times New Roman"P</font<font face="宋体"力作用线如图</font<font face="Times New Roman"2</font<font face="宋体",则该梁的变形状态为( )</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="146" height="176" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX2001.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.平面弯曲
B.斜弯曲+扭转
C.平面弯曲+扭转
D.斜弯曲
正确答案:————
27.[单选题] 截面面积矩的取值是( )
A.正值
B.负值
C.零
D.可能为正值、负值或零
正确答案:————
28.[单选题] 圆轴扭转时其横截面形状尺寸和直径的特点分别是( )
A.不变,仍为直线
B.改变,仍为直线
C.不变,不保持直线
D.改变,不保持直线
正确答案:————
29.[单选题] 广义虎克定律的适用范围是( )
A.脆性材料
B.塑性材料
C.任何材料
D.线弹性各向同性材料
正确答案:————
30.[单选题] 矩形截面杆受扭时,横截面上的最大剪应力发生在( )
A.长边中点
B.短边中点
C.角点
D.形心
正确答案:————
31.[单选题] 结构的超静定次数等于( )。
A.未知力的数目
B.支座反力数目与独立平衡方程数目的差数
C.支座反力的数目
D.未知力数目与独立平衡方程数目的差数
正确答案:————
32.[单选题] 构件的强度、刚度和稳定性( )
A.只与材料的力学性质有关
B.只与构件的形状尺寸有关
C.与二者都有关
D.与二者都无关.
正确答案:————
33.[单选题] 从梁的正应力强度方面考虑,最合理的截面形状是( )
A.圆形
B.I字形
C.长方形
D.正方形
正确答案:————
34.[单选题] 关于平面图形的结论中,错误的是( )
A.图形的对称轴必定通过形心
B.图形两个对称轴的交点必为形心
C.图形对对称轴的静距为零
D.使静矩为零的轴必为对称轴
正确答案:————
35.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"图</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"3</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"阶梯形杆受三个集中力</span<i<span style="font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"P</span</i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"作用.设</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AB</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"、</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"BC</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"、</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"CD</span</i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段的横截面面积分别为<font face="Times New Roman"A</font<font face="宋体"、</font<font face="Times New Roman"2A</font<font face="宋体"和</font<font face="Times New Roman"3A</font<font face="宋体",则三段杆的横截面上</font</span<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"轴力和应力分别</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"( )</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="440" height="148" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX23110.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p<p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.不等,相等
B.相等,不等
C.相等,相等
D.不等,不等
正确答案:————
36.[单选题] 重力为Q的物体,以匀速v下降,当吊索长度为l时,制动器刹车、起运卷筒以等减速在t秒后停止转动,动荷系数为( )
A.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="42" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16451.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
B.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="27" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16480.png"</span <span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" </span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
C.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="52" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16509.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
D.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="54" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16538.png"</span <o:p</o:p</p
正确答案:————
37.[单选题] 一跨度为l简支梁,若仅承受—个集中力P,当P在梁上任意移动时,梁内产生的最大剪力Qmax和最大弯矩Mmax分别满足( )
A.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="192" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22038.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
B.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="195" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22070.png"</span <o:p</o:p</p
C.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="192" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22095.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
D.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="195" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22127.png"</span <o:p</o:p</p
正确答案:————
38.[单选题] 稳定性是指构件在外力作用下( )
A. 不发生断裂
B. 不产生变形
C. 保持原有平衡状态
D. 保持静止
正确答案:————
39.[单选题] 在纯剪应力状态中,任意两相互垂直截面上的剪应力,必定是( )
A.均为正值
B.均为负值
C.一正一负
D.均为零
正确答案:————
40.[单选题] 不符合各向同性假设的材料是( )
A.铸铁
B.玻璃
C.松木
D.钢
正确答案:————
1.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"悬臂梁</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;",</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AB</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"和</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"BC</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段</span<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"的受力状态分别为</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"( )</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="280" height="138" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX7686.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.纯弯曲,剪切弯曲
B.剪切弯曲,纯弯曲;
C.纯弯曲,纯弯曲
D.剪切弯曲,剪切弯曲
正确答案:——B——
2.[单选题] 均匀性假设认为,材料内部各点相同的是( )
A.应力
B.应变
C.位移
D.力学性质
正确答案:——D——
3.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"1</font<font face="宋体"中属于轴向拉伸杆的是( )</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="480" height="147" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX21503.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.A
B.B
C.C
D.D
正确答案:——D——
4.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"2</font<font face="宋体"(</font<font face="Times New Roman"a</font<font face="宋体")和(</font<font face="Times New Roman"b</font<font face="宋体")两梁抗弯刚度相同,荷载相同,则其( ) 。</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="471" height="122" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX11293.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.内力不同,位移相同
B.内力相同,位移不同
C.内力与位移均相同
D.内力与位移均不相同
正确答案:————
5.[单选题] 截面极惯性矩的量纲是长度的( )
A.一次方
B.二次方
C.三次方
D.四次方
正确答案:————
6.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"单元体的应力状态见图<font face="Times New Roman"1</font<font face="宋体",则主应力σ</font</span<sub<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;vertical-align:sub;"1</span</sub<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"为( )<font face="Times New Roman"MPa</font<font face="宋体"。</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="150" height="75" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX10790.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.90
B.10
C.-90
D.-10
正确答案:————
7.[单选题] <p class="MsoNormal"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"1</font<font face="宋体"阶梯形杆受</font</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"P</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"作用,</span<i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AB</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"段为钢,</span<i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"BC</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"段为铝,( )</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="400" height="149" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX943.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.AB段轴力最大
B.BC段轴力最大
C.CD段轴力最大
D.三段轴力—样大
正确答案:————
8.[单选题] 等截面直杆承受轴向拉力F作用,若选用三种不同的截面形状:圆形、正方形、空心圆,`若其他条件相同,比较材料用量,则( )
A.正方形截面最省料
B.圆形截面最省料
C.空心圆截面最省料
D.三者用料相同
正确答案:————
9.[单选题] 长方形截面压杆,b/h=1/2,如果将b改为h后仍为细长杆,临界力Pcr是原来( )
A.2倍
B.4倍
C.8倍
D.16倍
正确答案:————
10.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"1</font<font face="宋体"(</font<font face="Times New Roman"a</font<font face="宋体")和(</font<font face="Times New Roman"b</font<font face="宋体")</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"为</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"材料相同的悬臂梁</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;",</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"(<font face="Times New Roman"a</font<font face="宋体")梁最大挠度是(</font<font face="Times New Roman"b</font<font face="宋体")梁的( )</font</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="355" height="97" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX15397.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="355" height="95" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX15398.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.1/4倍
B.1/2倍
C.2倍
D.4倍
正确答案:————
11.[单选题] 物体受力作用而发生变形,当外力去掉后又能恢复原来形状和尺寸的性质称为( )
A.弹性
B.塑性
C.刚性
D.稳定性
正确答案:————
12.[单选题] 矩形截面梁剪切弯曲时,在横截面的中性轴处正应力和剪应力的特征分别为( )
A.最大,零
B.零,最大
C.最大,最大
D.零,零
正确答案:————
13.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"悬臂梁的</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AC</span</i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段,各个截面上的( )。</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="320" height="135" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX5610.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.剪力相同,弯矩不同
B.剪力不同,弯矩相同
C.剪力和弯矩均相同
D.剪力和弯矩均不同
正确答案:————
14.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"在图<font face="Times New Roman"4</font<font face="宋体"四个剪应力中,剪应力符号位负的是( )</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="672" height="188" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX23618.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.A
B.B
C.C
D.D
正确答案:————
15.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"铸铁简支梁,当其横截面分别按图</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"5</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"两种情况放置时,梁的强度和刚度</span<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"分别</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"( )</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="219" height="105" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX24628.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.相同,不同
B.不同,相同
C.相同,相同
D.不同,不同
正确答案:————
16.[单选题] 应力是内力的( )
A.分布集度
B.矢量和
C.代数和
D.平均值
正确答案:————
17.[单选题] 在下列关于轴向拉压杆轴力的说法中,错误的是( )
A.内力只有轴力
B.轴力的作用线与杆轴重合
C.轴力是沿杆轴作用的外力
D.轴力与杆的横截面和材料无关
正确答案:————
18.[单选题] 塑性较好的材料在交变应力作用下,当危险点的最大应力低于屈服极限时( )
A.无明显塑性变形,且不发生断裂
B.有明显塑性变形,且不发生断裂
C.有明显塑性变形,且发生断裂
D.无明显塑性变形,且发生断裂
正确答案:————
19.[单选题] 卡氏定理只适用于( )
A.静定结构
B.超静定结构
C.线弹性大变形结构
D.线弹性小变形结构
正确答案:————
20.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"图<font face="Times New Roman"3</font<font face="宋体"矩形截面,</font</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"m</span</i<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"-</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"m</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"线以上部分和以下部分对形心轴</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"z</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"的静距的绝对值( )</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="135" height="132" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX2513.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.相等,正负号相同
B.相等,正负号不同
C.不等,正负号相同
D.不等,正负号不同
正确答案:————
21.[单选题] 细长压杆,若长度系数减少一倍,临界压力为原来的( )
A.1/4倍
B.1/2倍
C.2倍
D.4倍
正确答案:————
22.[单选题] 静定杆件的内力与其所在截面相关的参数是( )
A.形状
B.大小
C.位置
D.材料
正确答案:————
23.[单选题] 在等直梁的最大弯矩所在面附近,局部加大横截面尺寸能提高梁的( )
A.强度和刚度
B.强度
C.刚度
D.稳定性
正确答案:————
24.[单选题] 研究梁变形的目的是计算梁的( )
A.正应力
B.刚度
C.稳定性
D.剪应力
正确答案:————
25.[单选题] 自由落体冲击时,当冲击物重量G增加一倍时,若其它条件不变,则被冲击物内的动应力( )
A.不变
B.增加—倍
C.增加不足—倍
D.增加—倍以上
正确答案:————
26.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"工字钢的一端固定、一端自由,自由端受集中荷载</span<i<span style="font-family:Microsoft Yahei;font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"P</span</i<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"的作用。若梁的横截面和<font face="Times New Roman"P</font<font face="宋体"力作用线如图</font<font face="Times New Roman"2</font<font face="宋体",则该梁的变形状态为( )</font</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="146" height="176" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX2001.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.平面弯曲
B.斜弯曲+扭转
C.平面弯曲+扭转
D.斜弯曲
正确答案:————
27.[单选题] 截面面积矩的取值是( )
A.正值
B.负值
C.零
D.可能为正值、负值或零
正确答案:————
28.[单选题] 圆轴扭转时其横截面形状尺寸和直径的特点分别是( )
A.不变,仍为直线
B.改变,仍为直线
C.不变,不保持直线
D.改变,不保持直线
正确答案:————
29.[单选题] 广义虎克定律的适用范围是( )
A.脆性材料
B.塑性材料
C.任何材料
D.线弹性各向同性材料
正确答案:————
30.[单选题] 矩形截面杆受扭时,横截面上的最大剪应力发生在( )
A.长边中点
B.短边中点
C.角点
D.形心
正确答案:————
31.[单选题] 结构的超静定次数等于( )。
A.未知力的数目
B.支座反力数目与独立平衡方程数目的差数
C.支座反力的数目
D.未知力数目与独立平衡方程数目的差数
正确答案:————
32.[单选题] 构件的强度、刚度和稳定性( )
A.只与材料的力学性质有关
B.只与构件的形状尺寸有关
C.与二者都有关
D.与二者都无关.
正确答案:————
33.[单选题] 从梁的正应力强度方面考虑,最合理的截面形状是( )
A.圆形
B.I字形
C.长方形
D.正方形
正确答案:————
34.[单选题] 关于平面图形的结论中,错误的是( )
A.图形的对称轴必定通过形心
B.图形两个对称轴的交点必为形心
C.图形对对称轴的静距为零
D.使静矩为零的轴必为对称轴
正确答案:————
35.[单选题] <p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"图</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"3</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"阶梯形杆受三个集中力</span<i<span style="font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"P</span</i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"作用.设</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"AB</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"、</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"BC</span</i<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"、</span<i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-style:italic;font-size:12.0000pt;mso-font-kerning:1.0000pt;"CD</span</i<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"段的横截面面积分别为<font face="Times New Roman"A</font<font face="宋体"、</font<font face="Times New Roman"2A</font<font face="宋体"和</font<font face="Times New Roman"3A</font<font face="宋体",则三段杆的横截面上</font</span<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"轴力和应力分别</span<span style="mso-spacerun:'yes';font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"( )</span<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p<p class="MsoNormal"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="440" height="148" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX23110.png"</span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p<p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;"<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p </o:p</span</p
A.不等,相等
B.相等,不等
C.相等,相等
D.不等,不等
正确答案:————
36.[单选题] 重力为Q的物体,以匀速v下降,当吊索长度为l时,制动器刹车、起运卷筒以等减速在t秒后停止转动,动荷系数为( )
A.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="42" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16451.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
B.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="27" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16480.png"</span <span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" </span<span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
C.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="52" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16509.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
D.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="54" height="55" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX16538.png"</span <o:p</o:p</p
正确答案:————
37.[单选题] 一跨度为l简支梁,若仅承受—个集中力P,当P在梁上任意移动时,梁内产生的最大剪力Qmax和最大弯矩Mmax分别满足( )
A.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="192" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22038.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
B.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="195" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22070.png"</span <o:p</o:p</p
C.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="192" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22095.png"</span <span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;" <o:p</o:p</span</p
D.<p class="MsoNormal" style="line-height:150%;" style="display:inline;"<span style="font-family:'Times New Roman';font-size:12.0000pt;mso-font-kerning:1.0000pt;"<img width="195" height="52" src="http://wljy.whut.edu.cn:80/uploadfiles/word/CLLX.files/CLLX22127.png"</span <o:p</o:p</p
正确答案:————
38.[单选题] 稳定性是指构件在外力作用下( )
A. 不发生断裂
B. 不产生变形
C. 保持原有平衡状态
D. 保持静止
正确答案:————
39.[单选题] 在纯剪应力状态中,任意两相互垂直截面上的剪应力,必定是( )
A.均为正值
B.均为负值
C.一正一负
D.均为零
正确答案:————
40.[单选题] 不符合各向同性假设的材料是( )
A.铸铁
B.玻璃
C.松木
D.钢
正确答案:————
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