Application of Transient Aerodynamics to the Structural Nonlinear Flutter Problem
Application of Transient Aerodynamics to the Structural Nonlinear Flutter Problem
复制标题
瞬态空气动力学在结构非线性颤振问题中的应用
DOI：
10.2514/3.45703
复制
发表时间：
1988
影响因子：
2.2
通讯作者：
W. Eversman
中科院分区：
文献类型：
--
作者：
L. Brase;W. Eversman
本文提出了一种结构非线性颤振问题的瞬态时域解法。线性标准折合频率和瞬态颤振解之间的良好的协议，获得了一个简化的两个自由度系统与Theodorsen二维不可压缩非定常空气动力学和一个多自由度系统与三维可压缩非定常空气动力学。瞬态解，然后利用开发一种方法，精确地包括结构非线性的影响。这种方法提供了使用相同的详细结构和空气动力学模型进行线性和非线性分析的能力。
A method is presented for the transient, time domain solution of the structural nonlinear flutter problem. Excellent agreement between the linear standard reduced frequency and transient flutter solutions is obtained for both a simplified two-degree-of-freedom system with Theodorsen two-dimensional incompressible unsteady aerodynamics and a multiple-degree-of-freedom system with three-dimensional compressible unsteady aerodynamics. The transient solution is then utilized to develop an approach for precisely including the effects of structural nontinearities. This approach provides the capability of using the same detailed structural and aerodynamic models for both linear and nonlinear analyses.