一种高效的阻尼器优化设计方法

An Efficient Optimal Design Method for Dampers

以隔离非线性方法为基础,并对基于种群的可行性遗传算法进行改进,提出了一种高效的阻尼器优化设计方法。首先基于隔离非线性方法基本思想,分别推导了附加位移型和速度型阻尼器消能减震结构的隔离非线性控制方程;随后,采用基于种群可行性约束优化遗传算法对其中的初始种群生成方法及交叉、变异、选择算子进行改进,以提高算法在可行域边界附近的搜索能力;最后,通过对某钢结构增设金属阻尼器进行工程加固,验证了该方法的准确性和高效性。结果表明:新方法拓展了隔离非线性方法的应用范围,提高了遗传算法在可行域边界附近的搜索能力和设计中的计算效率,是一种高效的阻尼器优化设计方法。

Based on inelasticity-separated finite element method(IS-FEM)and the improvement of genetic algorithm based on population feasibility,an efficient optimal design method for dampers was proposed.Firstly,based on the basic idea of IS-FEM,the isolation nonlinear control equations of structure equipped with displacement-based dampers and velocity-based dampers were derived respectively.Then,the constrained optimization genetic algorithm based on population feasibility was adopted and the population initialization method,crossover,mutation and selection operators were modified to improve the searching ability near feasible region boundary.Finally,a steel structure retrofit project with metallic yielding dampers was taken as example to verify the accuracy and efficiency of the proposed method.The results show that the new method expands the application range of IS-FEM,improves the search ability of genetic algorithm near the boundary of feasible region,and improves the calculation efficiency in design.The proposed method is an efficient optimization design method of damper.