The research of this dissertation is focused on how to solve the 3 - dimensional compressible navier - stokes equations by the implicit finite difference algorithm and to simulate numerically the unsteady subsonic and transonic viscous flows around rigid and elastic wings . on the base of them the aeroelastic characterictics of an elastic wing have been studied 本文的主要工作是用隐式有限差分法求解三维非定常紊流n - s方程组,数值模拟刚性机翼及弹性机翼的亚、跨、超音速定常及非定常粘性绕流,并在此基础上研究了弹性机翼的气动弹性问题。
The conventional model construction method , rational functional approximation method , ca n ' t describe the nonlinear effect of the nonlinear unsteady aerodynamics . so the reduced order model based on volterra series for linear and nonlinear unsteady aerodynamics was investigated and applied to the model construction and active control law design of aeroelastic system 针对气动伺服弹性分析与设计中传统的有理函数拟合法不能够有效地描述非线性效应的问题,本文研究了基于volterra级数的非定常气动力降阶模型( rom )及其在气动弹性系统主动控制律设计中的应用。
Secondly , the static aeroelastic problems and jig - shape design , as a kind of multi - disciplinary design optimization ( mdo ) , are investigated for sweep wing and super - critical wing . numerical results are in good agreement with other reference data . the method and the program presented in this paper are verified 分别以某后掠机翼和超临界机翼为算例,对机翼的静气动弹性问题以及基于静气动弹性的型架外形优化设计和飞行姿态确定进行研究,计算结果和有关文献的结果进行了比较,吻合很好。