图示为一不计自重的托架,B处是铰链支座,A处是光滑接触;托架在载荷F =2kN的作用下处于平衡。已知尺寸如图所示,则A处的约束反力大小等于( )。http://edu-image.nosdn.127.net/B501403E435AD546CFACAA4365AA4B80.jpg?imageView&thumbnail=890x0&quality=100
举一反三
- 直角杆自重不计,尺寸如图,受已知力偶m作用,处于平衡。B处为光滑面接触。则铰链A处的约束反力大小等于() A: m/(2l) B: m/l C: ml D:
- 平面结构如图,C处为铰链,各杆自重不计,已知:F = 80 kN,q = 20kN/m , M = 60 kN.m,求支座A铅垂方向的约束反力FAx为 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201805/5a0554c5d85a4e1aba19bbb210db1ea5.png
- 图示杠杆机构中B处为螺栓联接,材料许用切应力为 http://edu-image.nosdn.127.net/_PhotoUploadUtils_7a3baa2d-246b-4ad6-b430-80e66d36fa83.png,不考虑挤压,已知支座B处约束力为http://edu-image.nosdn.127.net/_PhotoUploadUtils_b090252d-7a1d-49ae-9a9f-329e8bee92a6.png ,则螺栓最小直径为( )。http://edu-image.nosdn.127.net/49782124E78AD442DDD9D71CDF6FC533.png?imageView&thumbnail=890x0&quality=100http://edu-image.nosdn.127.net/BA4A589CA9C97E38D218216266737FE0.png?imageView&thumbnail=890x0&quality=100
- 如图所示超静定梁支座B处的约束反力为:( )。http://...il=890x0&quality=100
- 图示楔形块A、B,自重不计,接触处光滑,则A、B均处于平衡。540bb0c77419e11556e047e131f846cc.jpg