部件级多组件结构系统的整体式拓扑布局优化

基于多组件结构系统整体式拓扑布局优化设计方法,研究了同时含有部件布局、组件布局、主结构框架构型和部件结构构型4类设计变量的复杂系统协同优化设计问题,是整体式拓扑布局优化设计面向复杂飞行器结构系统设计的拓展。采用多点约束(MPC)模拟组件、部件及支撑结构之间的刚性连接,采用有限包络圆方法(FCM)解决组件之间、组件与设计域边界之间的几何干涉问题。通过整体式拓扑布局的刚度优化设计,部件和组件均可以获得优化的布局位置,同时主结构框架构型和部件结构构型获得优化的结构样式,充分体现了整体式拓扑布局优化设计方法应用于复杂结构系统设计的能力。

Integrated layout and topology optimization design of multi-component systems with assembly units

The purpose of this paper is to introduce assembly units into the existing integrated layout and topology optimization design of multi-component systems. Considering a complex system in which several components and assembly units are placed in a specified design domain, the aim of the design is to find the optimal position and orientation of each component and those of the assembly units, as well as the configuration of the structure that supports and interconnects the components and assembly units, which significantly extends the integrated layout and topology optimization design facing complicated aircraft and aerospace structure systems. The multi-point constraints (MPC) is used to simulate the rivets or bolts connections among the components, assembly units and the supporting structures. The finite-circle method (FCM) is applied to avoiding the overlaps among the components and those between components and boundaries of the design domain. The positions and orientations of the components and the assembly units are optimized together with the configuration of the supporting structures simultaneously through the proposed method. The optimized designs have shown the ability of integrated layout and topology optimization method in designing complicated aircraft and aerospace structure systems.