微压休闲舱加强筋布局优化及轻量化研究

Research on Stiffener Layout Optimization and Lightweight of Micro-Pressure Leisure Cabin

针对现有民用压力舱体存在质量过大,在模拟不同工况时因刚强度不足而发生失效,结构安全性较低的问题,这里以休闲舱结构为研究目标,深入研究其结构的静动态性能。通过构建多目标函数模型并在HyperMesh软件中定义,进行静动态拓扑优化,并获取舱体的单元密度图,分析确定其薄弱区域,同时对休闲舱加强筋结构重新布局并建模;为实现结构轻量化目标,通过构建尺寸优化的函数模型,对各区域加强筋和舱体壁面厚度参数进行优化。优化结果显示:优化后的休闲舱质量减少11.58%,前三阶固有频率分别提高了8.06%、8.34%、9.68%,最大变形量减少0.633mm,最大等效应力降低10.8MPa,在提高舱体结构安全性的同时实现了一定程度的轻量化。

Aiming at the weight and the malfunction,and the insufficient rigidity and strength of existing civil pressure cabins under simulated diferent working condition,which reduces structural security,the analysis will test the static and dynamic performance of the leisure cabin's structure.To obtain the unit density map of the cabin,determine the weak area and re-model the leisure cabin stiffener structure,a multi-objective function model in HyperMesh software is built and topological optimization under the static and dynamic loads is individually presented.In order to achieve structural lightweight,build a function model for an optimized size,the parameters of the stiffeners and the thickness of the cabin wall in each area is optimized.After analyzing,it presents that the first three natural frequencies are increased by 8.06%,8.34%,and 9.68%respectively,the weight of the optimized leisure cabin is reduced by 11.58%,the maximum deformation 0.633mm,and the maximum equivalent stress 10.8MPa.A certain degree of weight reduction is achieved while improving the safety of the cabin structure.