ANSYS优化方法在拱坝封拱温度设计中的应用

Application of ANSYS optimization methods in design of joint closure temperature of arch dams

ANSYS优化方法对不同的问题有着不同的计算效率。首先以弹性力学半圆环温度应力为例,研究在不同内半径下,圆环温度应力最小的优化问题。通过设置三组初始温度来比较不同优化方法的精度和收敛性,计算结果表明:零阶法+一阶法的组合优化效果最好。以此为基础结合建立拱坝封拱温度优化计算模型,选取三种方法进行求解,计算表明上述组合法可以得到拱坝最优封拱温度,在特定条件下零阶法也能满足要求。

The ANSYS optimization methods have different computational efficiency for different problems. In this paper, the temperature stress of semi-circular ring in elastic mechanics is taken as an example to study the optimization problem of minimum temperature stress under different inner radii. The accuracy and convergence of different optimization methods are compared by setting three initial temperatures. The results show that the combination of sub-problem method and first-order method is the best. Based on this conclusion, the optimal calculation model of joint closure temperature for arch dam is established, and three methods are selected. The calculation shows that the above - mentioned combination method can obtain the optimal joint closure temperature, and the sub-problem method can meet the requirement under certain conditions.