A、<img width='67' height='63' src='/s/tiw/p3/UpLoadImage/2019-07-15/d2fcb0d5-608d-436a-b20a-505ad8f6eac4.png'>
B、<img width='68' height='75' src='/s/tiw/p3/UpLoadImage/2019-07-15/c9cf17c6-674f-416f-b5df-8dbca0cd5825.png'>
C、<img width='68' height='64' src='/s/tiw/p3/UpLoadImage/2019-07-15/cf1c58c7-ec5d-4176-9b18-0b9c7688d2b2.png'>
D、<img width='73' height='65' src='/s/tiw/p3/UpLoadImage/2019-07-15/8897dc21-d729-420f-87e5-bc69fee572c7.png'>
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试题解析
体系可沿水平方向发生振动。m处为刚节点,在m处施加水平向右的单位力,由图乘法求得体系的柔度为:
故体系的自振频率为: