The variation of structural frequency before and after the damage is believed to be a most available and widely used modal parameter because of its easy testing and high measure precision.
由于结构频率容易测试并且有较高的测量精度，因此成为损伤识别中广泛应用的模态参数。
The variation of structural frequency before and after the damage is believed to be a most available and widely used modal parameter because of its easy testing and high measure precision.
由于结构频率容易测试并且有较高的测量精度，因此成为损伤识别中广泛应用的模态参数。
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