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作业解析 1

作业解析 1. 已知： 吊起的 No.20a 普通热轧槽钢以等减速度下降，若在 0.2s 时间内速度由 1.8m/s 降至 0.6m/s ，已知 l =6m ， b =1m 。. 试求： 槽钢中最大的弯曲正应为力。. 作业解析 1. 解： No.20a 槽钢的线密度 ρ =22.63 kg/m. 加速度. 分布惯性力集度：. 静载荷（自重）集度. 总载荷集度. 作业解析 1. 总载荷集度. 梁上最大弯矩：. =4×22.63(9.8+6)=1430N·m. 梁横截面的上最大正应力：.

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作业解析 1

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  1. 作业解析1 已知：吊起的No.20a普通热轧槽钢以等减速度下降，若在0.2s时间内速度由1.8m/s降至0.6m/s，已知l=6m，b=1m。 试求：槽钢中最大的弯曲正应为力。

  2. 作业解析1 解：No.20a槽钢的线密度 ρ=22.63 kg/m 加速度 分布惯性力集度： 静载荷（自重）集度 总载荷集度

  3. 作业解析1 总载荷集度 梁上最大弯矩： =4×22.63(9.8+6)=1430N·m 梁横截面的上最大正应力：

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