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优化方法采用内罚函数法。每个响应面用简化阻尼牛顿法求解搜索方向。在一维搜索中采用有关函数分别迫近目标函数和各约束函数·利用图形系统在计算机终端显示输入及输出数据,程序中优化模块与结构分析模块间用接口模块连接,使优化和有限元分析紧密结合起来。实践结果表明,使用上述优化方法,计算稳定,收敛性好。经过7次迭代,机身最优设计方案重量比原方案减轻了14.3％,结果是令人满意的。
The optimization method uses the penalty function method. Each response surface uses a simplified damping Newton method to find the search direction. In the one-dimensional search, the relevant functions are respectively approached to the objective function and each constraint function. · The graphic system is used to display the input and output data at the computer terminal. The optimization module and the structural analysis module are connected by the interface module in the program so that the optimization and finite element analysis are close Combined. The practical results show that using the above optimization method, the calculation is stable and the convergence is good. After 7 iterations, the weight of the optimal design of the fuselage was reduced by 14.3% compared with that of the original solution. The result was satisfactory.