A digital simulation method for flutter analysis (Q1066718)

This paper presents a digital simulation method which yields the flutter speed, the flutter frequency, and the subcritical response of a system. The flutter system can be considered as a control system comprising a number of linear hysteresis elements, and the model of the digital simulation is obtained. The subcritical responses of all elements of the system are determined by the Runge-Kutta method, and all eigenvalues and eigenvectors are obtained by the QR method. Some numerical results are given. The flutter and frequency calculated by the present method and those by the V-g method agree quite well. Moreover, it yields the responses of all elements of the system unobtainable with other methods. These numerical results show that the digital simulation method for studying a flutter system is feasible, accurate, and convenient.