【结构动力学第4课】2.1单自由度振动方程的建立：刚度法、柔度法、虚功法、重力和基础运动的影响

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A 37-minute video from 李小平老师: “【结构动力学第4课】2.1单自由度振动方程的建立：刚度法、柔度法、虚功法、重力和基础运动的影响”.

Video by 李小平老师, played through YouTube's embedded player.