Stability analysis of an aeroelastic system with friction

作     者：Tan Tiancai Li Min Liu Baihui 

作者机构：School of Aeronautic Science and Engineering Beihang University 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2013年第26卷第3期

页      面：624-630页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：the Fundamental Research Funds for the Central Universities(No.YWF-10-01-B05) 

主　　题：Critical aerodynamic damping Dissipated energy Hysteresis spring friction Input energy Stability 

摘      要：In this paper, harmonic balance method, exact formulation and numerical simulation method are adopted to study the effects of different friction stiffness on the stability of 1.5 degrees of freedom aeroelastic system. On this basis, the expressions of input energy and dissipated energy are deduced, and the energy method is used to reveal the mechanisms of the stable boundary and unstable boundary existing in the system and the effects of different friction stiffness on the stability of the system. Studies have shown that the stability region and the critical aerodynamic damping ratio of the system rise with the increase of the friction stiffness, while the friction stiffness has little effect on the stability boundary. In the analysis of the stability of system, the results of harmonic balance method, exact formulation and Newmark of numerical simulation method are in good agreement. Compared with exact formulation and numerical simulation method, the concept and conclusion of harmonic balance method are simple in the system stability analysis.