曲柄连杆活塞机构的活塞上受力 F=400N ，不计所有构件的重量。为能使机构在图示位置平衡，则在曲柄上加的力偶矩 M 应等于 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/f4dd4a5aba5d46eb8db4abe14baffe19.png
举一反三
- 图示机构中，作用有力偶矩为M的力偶和水平力P。机构尺寸如图示。试求机构在图示位置平衡时，M与P的关系为 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/b60df8f36a094da6836b108873495e85.png
- 图示曲柄连杆机构，已知曲柄OA长L，重量不计，连杆AB长2L，重P，受矩为M的力偶和水平力Ｆ的作用，在图示位置平衡。若用虚位移原理求解，则必要的虚位移之间的关系为___________，力F的大小为_____________________。<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/be06434307bd424abfc4ebfe02661f7a.png" /> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/b8e7b964d1c84aeca7b22ddef4de87a2.png" />;<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/a584946cde17410c945d6611ff2113b5.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/1aaef24e28ee477ab25dae0a400bf23f.png" />;<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/f3b395453e1d48bdadff2e37dfbbb626.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/be37912822f0451bb15639b7fa0589f1.png" />;<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/6d1112b5c1b4446b93578138388ed79f.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/89b7bcef6b51410cb624a654747d56ee.png" />;<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/0e2b78f437914a1eb8327d13185eaedf.png" />
- 图示曲柄连杆机构，已知曲柄OA长L，重量不计，连杆AB长2L，重P，受矩为M的力偶和水平力Ｆ的作用，在图示位置平衡。若用虚位移原理求解，则必要的虚位移之间的关系为___________，力F的大小为_____________________。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/be06434307bd424abfc4ebfe02661f7a.png
- 组合梁如图示。已知q=2kN/m ， F=10kN , 求固定端 A 处的约束力偶 M A 等于 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/3dc88c1d09c94a299948b91b63cfed38.png
- 图所示悬臂梁，当单独作用力F时，截面B的转角为θ，若先加力偶M，后加F，则在加F的过程中，力偶M 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201705/0751af63a760476db1a5c27b259ab298.jpg