基于参数化的水下航行器外形稳健性优化

摘要

为提高设计方案的稳健性和设计效率,本文将参数化设计和稳健性引入到某型水下航行器外形设计中.在设计了水下航行器阻力参数化分析流程的基础上,采用最优拉丁超立方法选取样本点进行阻力计算,利用响应面模型对样本点进行拟合,得到精度满足工程需要的艇体阻力近似模型.建立了水下航行器外形多目标优化模型,采用NSGA-III多目标优化算法进行确定性多目标优化求解.在考虑了外形设计过程中典型制造误差的基础上,开展外形稳健性优化求解.结果表明:稳健性优化与确定性优化相比,艇体阻力上升了12.34%,总包络体体积增加了51.98%,提高了水下航行器的稳健性.%In this study,to improve the robustness of a design scheme and the design efficiency,parametric design and robustness are optimized to design the shape of an underwater vehicle.Based on the resistance parameterization analysis of the underwater vehicle design, sample points were selected using the optimal Latin Hypercube method for resistance calculation and were fitted by a response surface model.An approximate hull resistance model that meets engineering demand was obtained.A multiobjective optimization model on the shape of underwater vehicle was established and the NSGA-III multiobjective optimization algorithm was adopted to solve deterministic multiob-jective optimization.Considering typical manufacturing errors in a shape design process,the robust optimization so-lution was performed.Compared with deterministic optimization,the hull resistance of robust optimization increased by 12.34%,and the total envelope volume increased by 51.98%.The robustness of the underwater vehicle was improved.