硬质合金内衬的组合超高压简体优化设计

研究了硬质合金内衬的多层组合超高压筒体的强度优化设计.以等强度理论为设计原则,建立了以各外层径比(外径与内径的比值)为变量,容器总径比为约束,弹性承压能力最大为目标的优化设计数学模型.应用Lagrange乘子法进行优化,得到了各层最优径比公式及最大内压公式.在此基础上,从叠加原理出发,推导了不同材料多层容器的层间缩套压...     

OPTIMAL DESIGN OF VERTICAL PRESSURE VESSELS WITH SUPPORTING CYLINDRICAL OR CONICAL SKIRT

The optimal design of vertical pressure vessels supported by skirts is presented. The optimization model assumes two stages of different diameters connected through a conical reducer and it has a supporting skirt which can be cylindrical or conical. The design variables are the thicknesses and lengths of individual shell tiers and the bottom diameter of the supporting skirt. The objective function is the weight of the shell tiers. The constraints are the allowable stresses and deflection of the vessel. A computer program has been developed which combines simplified pressure vessel design procedures with the techniques of nonlinear mathematical programming to solve the optimal design problem. The program is applied to the design of several pressure vessels.     

一类（0，1）规划问题的定界组合算法及其在离散变量结构优化设计中的应用

本文提出了求解一类线性（０，１）规划问题的定界组合算法。本算法首先根据约束条件对组合的下界进行定界，在搜索过程中再根据目标函数对其上界进行定界，因而在搜索过程中删除了大量的非可行组合及非最优组合，大大地减少了计算工作量，提高了计算效率。