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马,域域回国Am◇个778本840口97O口Y8白日由模型人布局1,=命令:pasteclip指定插入点:命令:取消*命令:75.6782,28.1149,0.0000画4+模型Q中,四上utoCAD经典图3承受集中载荷的简支梁 图4 机器安装示意图 答案 解:重物可视为一个集中的质量块,而梁则可视为一个没有质量的弹簧。重物落到梁上以后可将此系统视为一...