Structural modal parameter identification under ambient vibration is becoming the main research area.
基于环境振动的结构模态参数识别方法正逐渐成为国内外研究的一大热点。
A new method called direct eigensystem realization algorithm (DERA) is developed for structural modal parameter identification.
本文提出了一种新的结构模态参数识别算法，称为直接特征系统实现算法(DERA)。
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 testability and high measure precision.
由于结构频率测试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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