Multidisciplinary Design Optimization of A Human Occupied Vehicle Based on Bi-Level Integrated System Collaborative Optimization

The design of Human Occupied Vehicle （HOV） is a typical multidisciplinary problem, but heavily dependent on the experience of naval architects at present engineering design. In order to relieve the experience dependence and improve the design, a new Multidisciplinary Design Optimization （MDO） method ＂Bi-Level Integrated System Collaborative Optimization （BLISCO）＂ is applied to the conceptual design of an HOV, which consists of hull module, resistance module, energy module, structure module, weight module, and the stability module. This design problem is defined by 21 design variables and 23 constraints, and its objective is to maximize the ratio of payload to weight. The results show that the general performance of the HOV can be greatly improved by BLISCO.

BLISCO方法在载人潜水器设计中的应用

结合两级集成系统综合方法(Bi-Level Integrated System Synthesis)和协同优化(Collaborative Optimization)方法的主要特点,提出了一种新的多学科设计优化方法—两级集成系统协同优化方法(Bi-Level Integrated Sys-tem Collaborative Optimization,BLISCO)。它的关键思想是将设计变量分为系统级设计变量和子系统设计变量,并在保留协同优化方法协同机制的同时,用子系统耦合输出响应的加权和代替一致性约束作为子系统优化的目标函数。通过电子封装优化设计问题验证了BLISCO的收敛性、准确性以及鲁棒性。最后,文中将BLISCO方法应用于载人潜水器的多学科设计优化,大大提升了载人潜水器的总体综合性能。

基于近似模型的两级集成系统协同优化方法

在两级集成系统协同优化(BLISCO)方法的基础上提出了一种基于近似模型的BLISCO方法,该方法在继承了BLISCO方法优点的同时,具有能够减少设计优化过程中仿真分析和计算次数、平滑设计空间数值噪声、加快收敛速度等优点。通过两个算例,针对子系统存在耦合和不存在耦合两种情况对所提出方法进行了测试,分析结果表明,采用基于近似模型的BLISCO方法可以快速、准确地获得最优解,且综合性能优于原BLICO方法和相关文献所提出的方法。