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建立了一种基于CFD/CSD(computational fluid dynamics/computational structure dynamics)耦合的多学科优化设计方法.该方法采用结构有限元方程进行结构特性分析,同时采用数值求解N-S方程方法获得气动载荷,保证了设计结果的可信性,并采用基于代理模型的优化设计方法解决了采用高精度模型后计算量太大的问题.采用RBF(径向基函数)插值方法进行流固耦合界面数据插值,保证了传递过程中的能量守恒.利用建立的优化设计方法对一典型的翼身组合体进行了气动和结构优化设计,算例表明在满足约束条件的前提下优化后阻力和质量分别减小了5.0%和4.2%,证明了该方法的有效性.
A multidisciplinary optimization design method based on the coupling of CFD / CSD (computational fluid dynamics / computational structure dynamics) is proposed.The structural FEA method is used to analyze the structural characteristics and the numerical solution of the NS equation is used to obtain the aerodynamic loads The reliability of the design results and the optimal design method based on the agent model to solve the problem of too much computation after using the high-precision model.It uses the RBF (radial basis function) interpolation method to interpolate the fluid-solid interface data to ensure The energy conservation in the process of transmission is optimized.The aerodynamic and structural optimization design of a typical wing-body assembly is established by using the optimized design method.The calculated results show that the resistance and the mass of the optimized wing-body assembly are reduced by 5.0% And 4.2%, which proves the effectiveness of this method.