给定图示正方形,则图形对形心轴y和y的惯性矩Iy1与Iy之间的关系为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/77cbf7a97695404aaa4569d26f5659d6.png
举一反三
- 给定图示正方形,则图形对形心轴y和y的惯性矩Iy1与Iy之间的关系为( )。[img=117x120]178698bf4479c0c.png[/img] A: Iy1 > Iy B: Iy1 = Iy C: Iy1 = 0.5Iy D: Iy1 < 0.5Iy
- 图示正方形对x,y轴的惯性矩阵和惯性积分别为Ix,Iy和Ixy,下列结论中哪些是正确的?( ) (1)Ix=Iy; (2)Ix’=Iy’; (3)Ix=Ix’; (4)Ixy=Ix’y’http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/06df735ae8734b3f995cf9274f091650.png
- 设图示截面对y轴和x轴的惯性矩分别为Iy、Ix,则二者的大小关系是https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/78eaf7d77a9243b49f003db9b3f190f5.png
- 如图所示,已知直径为d的圆形ABCD对x,y轴的惯性矩和惯性积分别为Ix=Iy=πd4/64,Ixy=0,则下列结论中哪些是正确的? (1)半圆形ABC对x,y轴的惯性矩和惯性积分别为Ix=Iy=πd4/128,Ixy=0; (2)直角扇形0AB对x,y油的惯性矩和惯性积分别为Ix=Iy=πd4/256,Ixy=0; (3)扇形0ABCD对x,y油的惯性矩和惯性积分别为Ix=Iy=πd4/256,Ixy>0。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201808/df368c7326e7437e8a2e3265b096f8e3.png
- 下面两图对各自形心轴y、z的惯性矩关系为( )。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/f0496bc00b7e4849bad877f533b27645.png