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Modal Analysis Using Operating Modal Identification Method

机译:使用运行模态识别方法的模态分析

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摘要

Sometimes it is very difficult for some large-scale operating structures to measure the input forces. Modal parameters must be estimated on response-only. A poly-reference time-domain operating modal identification complex exponential method is presented since cross-correlation functions have the same form as impulse response functions. Then a poly-reference frequency-domain operating modal identification method is proposed in this paper. An experiment on an aircraft model is performed to verify the proposed schemes. The results show that both outlined schemes can extract the parameters from output-only and the modal parameters extracted by proposed frequency-domain method are more accurate than those by presented time-domain complex exponential method.
机译:有时,某些大型操作结构很难测量输入力。模态参数必须仅在响应时估算。由于互相关函数具有与脉冲响应函数相同的形式,因此提出了一种多参考时域操作模式识别复指数方法。然后提出了一种多参考频域工作模式识别方法。在飞机模型上进行了实验,以验证所提出的方案。结果表明,两种概述的方案都可以仅从输出中提取参数,并且所提出的频域方法所提取的模态参数比所提出的时域复指数方法更准确。

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