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我们前面的例子里，相当于地面加速度是 0.16g，也就是说，我们近似认为， 地震到来的这 48 秒内，地面加速度一直是 0.16，没有变化。但实际上呢，真实地震加速度 的变化非常不规律，其实是上面的这个图形，一会儿是+0.1，一会儿+0.5，一会儿又是 0， 一会儿又是-0.4，随时间变化非常剧烈
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owner: bian222 - (no access) - 地震力是怎么算出来的111.pdf, p31


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