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这相当于把这个三层房子拆成了三个一层房子。三层房子每层的层高是 h,质量是 m。而拆分之后的第一个房子,对应于第一振型,质量 2.74m,高度 2.25h,周期 0.547 秒; 第二个房子对应第二振型,质量 0.22m,高度-0.80h,周期 0.195 秒;第三个房子对应第三 振型,质量 0.03m,高度 0.55h,周期 0.135 秒。 注意到,对于三层房子,质量与高度的乘积之和等于 而对于三个单层房子,它们的质量与高度的乘积之和为
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owner: bian222 - (no access) - 地震力是怎么算出来的111.pdf, p69


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