Limit cycle oscillation suppression of 2-DOF airfoil using nonlinear energy sink  

作　　者：郭虎伦 陈予恕 杨天智 

机构地区：[1]School of Mechanical Engineering, Tianjin University [2]Tianjin Key Laboratory of Nonlinear Dynamics and Chaos Control [3]School of Astronautics, Harbin Institute of Technology [4]Department of Engineering Mechanics, Shenyang Aerospace University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2013年第10期1277-1290,共14页应用数学和力学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.11172199);the KeyProgram of Tianjin Natural Science Foundation of China(No.11JCZDJC25400)

摘　　要：This paper presents a novel mechanical attachment, i.e., nonlinear energy sink （NES）, for suppressing the limit cycle oscillation （LCO） of an airfoil. The dynamic responses of a two-degree-of-freedom （2-DOF） airfoil coupled with an NES are studied with the harmonic balance method. Different structure parameters of the NES, i.e., mass ratio between the NES and airfoil, NES offset, NES damping, and nonlinear stiffness in the NES, are chosen for studying the effect of the LCO suppression on an aeroelastic system with a supercritical Hopf bifurcation or subcritical Hopf bifurcation, respectively. The results show that the structural parameters of the NES have different influence on the supercritical Hopf bifurcation system and the subcritical Hopf bifurcation system.This paper presents a novel mechanical attachment, i.e., nonlinear energy sink （NES）, for suppressing the limit cycle oscillation （LCO） of an airfoil. The dynamic responses of a two-degree-of-freedom （2-DOF） airfoil coupled with an NES are studied with the harmonic balance method. Different structure parameters of the NES, i.e., mass ratio between the NES and airfoil, NES offset, NES damping, and nonlinear stiffness in the NES, are chosen for studying the effect of the LCO suppression on an aeroelastic system with a supercritical Hopf bifurcation or subcritical Hopf bifurcation, respectively. The results show that the structural parameters of the NES have different influence on the supercritical Hopf bifurcation system and the subcritical Hopf bifurcation system.

关 键 词：two-degree-of-freedom （2-DOF） airfoil FLUTTER limit cycle oscillation （LCO）suppression nonlinear energy sink （NES） 

分 类 号：V215.34[航空宇航科学与技术—航空宇航推进理论与工程]