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基于环境激励的ERA方法在网架结构振动测试中的应用研究

, PP. 176-182

Keywords: 随机减量法,NExT法,ERA,网架结构,环境激励,模态参数

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Abstract:

基于环境激励的结构振动测试的方法中ERA方法是重要的时域分析方法。本文主要是以随机减量法(RD)和NExT两种数据处理方法结合ERA算法,对绥化学院正在建的网架结构的基本模态参数进行测试。通过分析比较得出RD/ERA和NExT/ERA较直接ERA有更高的精度,且实测分析结果与有限元分析结果较吻合。为网架结构在环境激励下用ERA方法测试模态参数提供了实验依据。

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