Ambient vibration test is the main method of detecting a large bridge structure, Modal parameters is important to determine the health status of the bridge.
环境振动试验是检测大型桥梁结构的主要方法，检测得到的模态参数是判定桥梁健康状况的重要依据。
The method is used for detecting nonlinearity of machinery vibration signal time series, the result is consistent with the practice.
采用该方法对设备振动信号进行非线性检验，检验结果与实际情况相符。
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