复合材料层合板的颤振预测和模态交叉分析

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (20) : 7-11.

论文

复合材料层合板的颤振预测和模态交叉分析

王战玺，秦现生，白晶，李靖

作者信息 +

Flutter Detection and Mode Coupling Analysis of Composite Laminated Plate WANG Zhan-Xi, QIN Xian-Sheng, LI Jing and ZHANG Xue-Feng

WANG Zhan-Xi, QIN Xian-Sheng, LI Jing and ZHANG Xue-Feng

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文章历史 +

摘要

根据颤振分析的有限元理论，将特征向量定位法应用到复合材料层合板的颤振预测和模态交叉分析。该方法利用特征向量正交性的衰减性质，以特征向量角作为依据来判定颤振临界值。建立了复合材料壁板的有限元空气动力模型，编制了相应的算法，分别使用频率耦合法和特征向量定位法进行颤振预测分析。结果表明，所得的颤振频率和临界气动压力参数与传统颤振分析方法计算结果精度相当，能够实现模态的实时追踪，并从本质上避免了模态交叉问题对颤振预测的影响。

Abstract

The eigenvector orientation method is used to solve flutter detection and mode coupling problem of composite laminated plate based on the Finite Element Theory. By using the attenuating orthogonality between two related eigenvectors, this method tracks the angle of two eigenvectors to detect flutter boundary. The finite element aerodynamic model of composite laminated plate is built, and the corresponding arithmetic program is designed. Both of the coalescence of frequencies method and the eigenvector orientation method are used to analyze the flutter detection. The results illustrate that the flutter frequency and the critical aerodynamic pressure parameter are in good agreement with those obtained by using classical flutter analysis method, and the mode shapes can be easily tracked in real-time flutter prediction by using this method. It is proved that the influence arisen from mode coupling can be constitutionally avoided in eigenvector orientation method for detection of the flutter boundary.

导出引用

王战玺;秦现生;白晶;李靖. 复合材料层合板的颤振预测和模态交叉分析[J]. 振动与冲击, 2012, 31(20): 7-11

WANG Zhan-Xi;QIN Xian-Sheng;LI Jing and ZHANG Xue-Feng. Flutter Detection and Mode Coupling Analysis of Composite Laminated Plate WANG Zhan-Xi, QIN Xian-Sheng, LI Jing and ZHANG Xue-Feng[J]. Journal of Vibration and Shock, 2012, 31(20): 7-11