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guyuege

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[求助] Rayleigh阻尼系数怎么确定?

如题,我在abaqus中采用直接阻尼计算过,但是不同的阻尼系数对结果影响较大,采用Rayleigh阻尼也试过,a取的3,b取的0,但是衰减不明显。通过查阅资料,找到了计算方法,但是需要各阶振型的临界阻尼,而临界阻尼系数不知怎么获得。
       上面是我最近模拟的过程,可能中间就出现了问题,期望各位大神来指路!
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