厚壁圆筒自增强优化的另一种方法

ANOTHER METHOD OF SELF - REINFORCE- MENT OPTIMAZATION OF THICK WALL CY- CLINDER

文献中给出的厚壁圆筒(或管)强度设计和自增强优化分析的方法均是分步进行的,即:先按有关强度设计规范确定厚壁圆筒径比K,然后确定最佳弹-塑性界面半径rcopt。这样,不仅计算速度慢而且精度偏低。据此,给出一种“双变量”自增强优化分析方法。选择K和rcopt为设计变量,强度和几何方面的限制为约束条件,综合应力最小为目标函数。并用TurboC语言编制相应的计算程序,同时给出K及rcopt的适宜值。结合高强度钢(4333M4 钢)给出算例,在算例中建议一种双线性应力-应变曲线的简捷画法,应用十分方便。

The methods of thick wall cylinder (tube) strength design and self-reinforcement optimization analysis given by literature were in progress step by step, that was: at first the K (ratio of thick wall cylinder and radius ) was determined by relative strength design code, then the optimum elasticity - plastic interface radius rcopt was determined. So not only the calculation speed was slow, but also the accuracy was low. Accordingly a self-reinforcement optimization analysis method with “double variable” was given. Select K and rcopt as the design variables, strength and geometric limit as the constraints, minimum comprehensive stress as the objective function. By the use of corresponding calculation program compiled by TurboC language, and the given suitable values of K and rcopt, the calculation example of high strength steel (4333M4) was given. A simple and easy description of double linear stress-strain curve was proposed, and was very convenient for use.