| 非线性二元机翼气动弹性近似解析研究 |
| |
| 引用本文： | 李道春,向锦武.非线性二元机翼气动弹性近似解析研究[J].航空学报,2007,28(5):1080-1084. |
| |
| 作者姓名： | 李道春 向锦武 |
| |
| 作者单位： | 北京航空航天大学,航空科学与工程学院,飞机所,北京,100083 |
| |
| 基金项目： | 国家自然科学基金
,
教育部跨世纪优秀人才培养计划 |
| |
| 摘 要： | 建立了不可压流动中多项式迟滞非线性二元机翼的气动弹性运动方程，然后利用谐波平衡法进行了求解。与数值积分结果比较分析表明，在系统发生二次分叉以前，谐波平衡法可以准确地预测极限环振荡的频率和振幅,通过频谱分析与时间响应历程讨论了谐波平衡法产生误差的原因。另外还研究了弹性轴位置对颤振特性的影响，随着弹性轴不断靠近翼弦中点，俯仰振幅不断增大，而沉浮振幅则存在一个极小值点。
|
| 关 键 词： | 非线性气动弹性 极限环振荡 谐波平衡法 迟滞非线性 颤振 |
| 文章编号： | 1000-6893(2007)05-1080-05 |
| 修稿时间： | 2006年8月4日 |
Nonlinear Aeroelastic Analysis of Airfoil Using Quasi-analytical Approach |
| |
| LI Daochun,XIANG Jinwu.Nonlinear Aeroelastic Analysis of Airfoil Using Quasi-analytical Approach[J].Acta Aeronautica et Astronautica Sinica,2007,28(5):1080-1084. |
| |
| Authors: | LI Daochun XIANG Jinwu |
| |
| Institution: | The Aircraft Institute, School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics |
| |
| Abstract: | The dynamical equation of a two-dimensional airfoil with polynomial hysteresis nonlinearity is built in an incompressible flow.Then the harmonic balance method(HB)is used to solve the equation.According to a comparison with the results from numerical time marching integration,it is shown that the harmonic balance method can accurately predict the frequency and amplitude of flutter before the second bifurcation appeared.The power spectral density and time history are used to investigate the applicability of harmonic balance method.The effect of the elastic axis is also investigated.With the elastic axis closing to the airfoil midpoint,the pitch amplitude increases slightly while the plunge amplitude fluctuates with an extremum. |
| |
| Keywords: | nonlinear aeroelasticity limit circle oscillation harmonic balance method hysteresis nonlinearity flutter |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空学报》浏览原始摘要信息 |
| 点击此处可从《航空学报》下载免费的PDF全文 |
