PERIODICITIES CHANGES OF NONLINEAR OSCILLATORY BEHAVIOR OF A FLUTTERING PLATE WITH PERIODICITY RATIO AND PERIODICITY CHANGE RATE

摘要

This study focuses on diagnosing the periodicity change of nonlinear dynamic responses of a fluttering plate excited by high-velocity air flow. The number and changing multiple-periodicities of the system with the implementation of Periodicity Ratio (PR) are investigated. The multiple-periodicity diagram is generated such that the periodicities and nonlinearity of the systems with respect to the system parameters can be graphically studied. The results of the research show that the number of period of periodicity of the systems increases when certain system parameters increase. Transitional characteristics of the systems are also investigated with Periodicity Change Rate as well.