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.
2012, Vol. 31 
