藕节形耐压壳体强度与稳定性分析及优化设计

结合有限元理论,利用基于试验点的设计方法对藕节形耐压壳体进行优化设计。基于试验点的优化设计的相关理论,利用正交试验设计确定25组试验点。利用参数化建模的方法建立25组试验点对应的藕节形耐压壳体的三维模型。基于有限元理论,利用Workbench对其强度及稳定性进行分析,得到各试验点参数对应的最大应力、临界失稳载荷及壳体质量。根据有限元分析结果,构造最大应力、临界失稳载荷及壳体质量关于球心间距半径比、厚度及切弧角的响应面;利用遗传算法,结合构造的响应面,对藕节形壳体进行优化设计并利用Workbench对其进行校核,验证所设计壳体的安全性。

Analysis and Optimization Design of Strength and Stabilityof Multiple Intersecting Spheres Pressure

Combined with the finite element theory, the optimization design of multiple intersecting spheres pressure hull is conducted with the design method based on the test points. Based on the relevant theory of optimization design of test points, 25 groups of test points are determined with the orthogonal test design.The three-dimensional model of multiple intersecting spheres pressure hull corresponding to 25 test points is established with the parameterization modeling method. Based on the finite element theory, its strength and stability are analyzed with Workbench to obtain the maximum stress, critical buckling load, and hull mass corresponding to the parameters of each test point. According to the results of finite element analysis, the response surfaces of maximum stress, critical buckling load, and hull mass related to the spherical center spacing radius ratio, thickness, and cutting arc angle are constructed. Using the genetic algorithm, combined with the constructed response surfaces, the optimization design of multiple intersecting spheres hull is conducted and is checked with Workbench to verify the safety of designed hull.