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| 带有结构非线性的跨音速翼型颤振特性研究 | |
| 引用本文： | 杨永年,叶正寅. 带有结构非线性的跨音速翼型颤振特性研究[J]. 计算物理, 2002, 19(2): 173-176 |
| 作者姓名： | 杨永年 叶正寅 |
| 作者单位： | 西北工业大学114信箱, 陕西 西安 710072 |
| 基金项目： | 国家自然科学基金资助项目 |
| 摘 要： | 以非定常N-S方程为主管方程,采用时间推进的方法,计算翼型振荡的瞬态非定常气动力,并与带有结构非线性的颤振方程耦合求解,计算了带有结构刚度非线性(间隙型,三次型刚度非线性)和结构阻尼非线性(三次型阻尼非线性)的结构响应特性和颤振特性.计算研究表明,由于同时具有结构和气动非线性,振荡极限环和气动力极为复杂. |
| 关 键 词： | 跨音速颤振 结构非线性 N-S方程 |
| 文章编号： | 1001-246X(2002)02-0173-04 |
| 收稿时间： | 2000-04-25 |
| 修稿时间： | 2000-04-25 |
AN INVESTIGATION OF AIRFOIL FLUTTER CHARACTERISTICS WITH STRUCTURE NONLINEARITY AT TRANSONIC SPEED |
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| YANG Yong-nian,YE Zheng-yin. AN INVESTIGATION OF AIRFOIL FLUTTER CHARACTERISTICS WITH STRUCTURE NONLINEARITY AT TRANSONIC SPEED[J]. Chinese Journal of Computational Physics, 2002, 19(2): 173-176 | |
| Authors: | YANG Yong-nian YE Zheng-yin |
| Affiliation: | Northwestern Polytechnical Universtity, Xi'an 710072, P R China |
| Abstract: | An analysis method of the airfoil flutter system with nonlinear structure at transonic speeds is presented. The unsteady aerodynamic forces are calculated by Navier-Stokes equations. The time histories of structure responses of airfoil are solved by coupling the Navier-Stokes equations and flutter equations. The systems with gap stiffness, cubic type stiffness and cubic structure damping are investigated. The calculated results show that the influence of the structure nonlinearity on flutter speed is sensitive. Due to both the structure and aerodynamic nonlinearity in the flutter system, the oscillation characterstics become very complex. |
| Keywords: | transonic flutter nonlinear structure Navier-Stokes equations |
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