水下控制系统电子模块壳体结构优化及试验验证

摘要

According to the lightweight requirements for subsea electronic modules (SEM) in control systems,SEM structure scheme was determined,and the design of its pressure shell structure was carried out.Finite element analysis for the failure mode of the SEM shells was conducted,and the failure type was determined to be yield failure.On the basis of the work above,the equation of response surface model of SEM shells was established using a multi-objective optimization method based on response surface equation.Overall optimal solution of the equation was obtained by applying Pareto genetic algorithm,hence the optimized parameter values of shells as well.Finally,a prototype was fabricated based on the optimized structure,and high pressure tank tests were carried out.The results show that the mass of the optimized SEM is smaller than that of the previous one by 24.8％,and meets the strength and stability requirements,achieving the goal of lightweight.The results of the research work here have good reference significance for electronic module shell structure design of deepwater control systems.%基于水下控制系统电子模块(SEM)轻量化的要求,确定了SEM结构方案,并对其耐压壳体进行了结构设计.对SEM壳体的失效模式进行了有限元分析,确定了其失效形式为屈服失效.在此基础上,采用一种基于响应面方程的多目标优化法建立了SEM壳体的响应面方程模型,应用Pareto遗传算法得到了响应面模型方程的全局最优解,从而得到壳体优化后的参数值;最后将所设计的SEM壳体采用优化后的结构尺寸加工制造成实体,并对其进行了高压舱试验验证,结果表明,优化后的SEM壳体质量较优化前降低了24.8％,且满足其在强度和稳定性方面的要求,实现了SEM轻量化的目标.本文研究成果对深水水下控制系统电子模块壳体结构设计具有较好的借鉴意义.