多场耦合求解非线性气动弹性的研究综述

AN OVERVIEW OF CFD/CSD COUPLED SOLUTION FOR NONLINEAR AEROELASTICITY

非线性气动弹性分析中,涉及到非线性流体动力学和非线性结构动力学的耦合问题.阐述了国内外应用计算流体动力学(computational fluid dynamics,CFD)/计算结构动力学(computational structural dynamics, CSD)耦合求解技术来处理非线性气动弹性问题的研究现状,全面分析了流体域和结构域的非线性特征模拟技术、高效网格运动策略、耦合界面相容性条件、耦合计算效率及降阶技术、气动弹性实验及算法验证、多学科耦合求解等关键技术,总结了相关最新研究的方法和成果,对比分析了其优缺点并提出了展望.

The coupled dynamics （CSD） related problems between computational fluid dynamics （CFD） and computational structural to nonlinear aeroelastieity are highly nonlinear in time domain. The main numerical techniques and algorithms of CFD/CSD coupled solution for nonlinear aeroelasticity are presented in this paper, including nonlinear behavior simulation technique in fluids and structure, effective grid deformation strategies, consistent fluid/structure interface treatment, computational efficiency with reduced order model method, well documented aeroelastic experiments for aeroelastic code validation, and multidisciplinary coupled solution. Recent studies are summarized and compared and significant conclusions are drawn. CFD/CSD coupled method, due to its favorable numerical characteristic, will surely become a predominant tool for solving nonlinear aeroelasticity problems.