摘要
基于CFD/CSD的高精度气动弹性方法计算了某大柔度机翼的气动弹性问题,分析了结构非线性对计算精度的影响。基于CFD/CSD的气动弹性方法具有精度高的显著优点,因此很适合用于分析飞行器气动弹性问题,但庞大的计算量所带来的计算效率问题限制了该方法的应用。近年来,随着计算机计算能力的快速提高以及流体结构求解算法的发展,基于CFD/CSD的气动弹性计算方法得到了越来越广泛的应用。大柔度飞行器在飞行状态下结构变形很大,呈现出很强的结构非线性,此时必须考虑结构非线性对气动弹性计算结果的影响。文章对线性和非线性计算结果进行了比较,认为对于大柔度飞行器结构,考虑结构非线性对基于CFD/CSD气动弹性方法仿真精度的提高有着重要的意义。
Based on the CFD/CSD method, the aeroelasticity of a flexible wing was calculated, and the effect of structural nonlinearity on the precision of the calcnlation was analyzed. The aeroelastic simulation based on CFD/ CSD method is very suitable for analyzing aircraft aeroelastic problems due to its high precision. However, the disadvantage of very large amount of calculation limits its application. In recent years, with the improvement of the computer capability and the development of CFD/CSD solving algorithm, the method has been used widely. The influence of structural nonlinearity on the aeroelasticity must be considered, since the deformation of flexible aircraft structure is evident on flight state, and the structural nonlinear character is obvious. Through comparing the linear with nonlinear results, it can be seen that for a flexible aircraft the structural nonlinearity has significant effect on the precision of aeroelastic simulation based on CFD/CSD method.
出处
《机械科学与技术》
CSCD
北大核心
2009年第5期657-660,共4页
Mechanical Science and Technology for Aerospace Engineering
基金
航空科学基金项目(20060953013)资助
