Representation and analysis of control surface freeplay nonlinearity

被引：65
|
作者：
Vasconcellos, R. [2 ]
Abdelkefi, A. [1 ]
Marques, F. D. [2 ]
Hajj, M. R. [1 ]
机构：
[1] Virginia Polytech Inst & State Univ, Dept Engn Sci & Mech, Blacksburg, VA 24061 USA
[2] Univ Sao Paulo, Lab Aeroelast, Sao Carlos, SP, Brazil
来源：
JOURNAL OF FLUIDS AND STRUCTURES | 2012年 / 31卷
基金：
美国国家科学基金会; 巴西圣保罗研究基金会;
关键词：
Aeroelasticity; Control surface; Freeplay nonlinearity; Experimental identification; Duhamel formulation; Poincare section; BEHAVIOR; AIRFOIL; IDENTIFICATION;
D O I：
10.1016/j.jfluidstructs.2012.02.003
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Different representations for a control surface freeplay nonlinearity in a three degree of freedom aeroelastic system are assessed. These are the discontinuous, polynomial and hyperbolic tangent representations. The Duhamel formulation is used to model the aerodynamic loads. Assessment of the validity of these representations is performed through comparison with previous experimental observations. The results show that the instability and nonlinear response characteristics are accurately predicted when using the discontinuous and hyperbolic tangent representations. On the other hand, the polynomial representation fails to predict chaotic motions observed in the experiments. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：79 / 91
页数：13
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