Modal Parameter Global Identification Weighting with Complete Modal Shapes
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摘要: 提出了整體頻響函數的新概念(GFRF).以振型平方和的形式對全部頻響函數進行加權組合,建立了多輸入多輸出模態參數的識別模型.仿真驗算的分析結果表明,該方法具有精度高,一致性好,能分離密集模態和消除隨機噪聲等優點,可以應用于大型復雜結構的試驗模態分析.Abstract: A concept of global frequency response function(GFRF) has been presented.The MIMO modal parameter identification modal has been established,based on the weighting sum of modal shape squares.The analytical results of artificial example show that the proposed method has the advantages of accuracy,consistency,separating closely-spaced modes and eliminating random noise.This method can be used for experimental modal analysis of large or complicated structure.
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Key words:
- modal parameter /
- identification /
- test modal analysis
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