POSTINSTABILITY BEHAVIOR OF A 2-DIMENSIONAL AIRFOIL WITH A STRUCTURAL NONLINEARITY

被引：82

作者：

PRICE, SJ

LEE, BHK

ALIGHANBARI, H

机构：

[1] McGill University, Department of Mechanical Engineering, Montreal, QC

[2] National Research Council, High Speed Aerodynamics Laboratory, Institute for Aerospace Research, Ottawa, ON

[3] McGill University, Department of Mechanical Engineering, Montreal, QC

来源：

JOURNAL OF AIRCRAFT | 1994年 / 31卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.2514/3.46664

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

A two-dimensional airfoil with a free-play nonlinearity in pitch subject to incompressible flow has been analyzed. The aerodynamic forces on the airfoil were evaluated using Wagner's function and the resulting equations integrated numerically to give time histories of the airfoil motion. Regions of limit cycle oscillation are detected for velocities well below the linear flutter boundary, and the existence of these regions is strongly dependent on the initial conditions and properties of the airfoil. Furthermore, for small structural preloads, narrow regions of chaotic motion are obtained, as suggested by power spectral densities, phase-plane plots, and Poincare sections of the airfoil time histories. The existence of this chaotic motion is strongly dependent on a number of airfoil parameters, including, mass, frequency ratio, structural damping, and preload.

引用

页码：1395 / 1401

页数：7

共 18 条

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