图示平面构架,不计各杆自重。已知:物块M重FP,悬挂如图示,不计小滑轮D的尺寸与质量,A、E、C均为光滑铰链,L1= 1. 5m,L2=2m。则支座B的约...

作者: tihaiku 人气: - 评论: 0
问题 图示平面构架,不计各杆自重。已知:物块M重FP,悬挂如图示,不计小滑轮D的尺寸与质量,A、E、C均为光滑铰链,L1= 1. 5m,L2=2m。则支座B的约束力为:
选项 A.FB=3FP/4(→) B.FB=3FP/4(←) C.FB=FP(←) D.FB=0
答案 A
解析 解:取构架整体为研究对象,列平衡方程:∑MA(F) = 0,FB *2L2 - FP* 2L1= 0。

相关内容:平面,构架,各杆,自重,物块,滑轮,尺寸,质量,铰链,支座,的约

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