计算机工程与应用 ›› 2013, Vol. 49 ›› Issue (19): 250-253.

• 工程与应用 • 上一篇    下一篇

基于进化策略有频率禁区的结构优化设计方法

程沙沙,苏国韶,燕柳斌   

  1. 广西大学 土木建筑工程学院 工程防灾与结构安全教育部重点实验室,南宁 530004
  • 出版日期:2013-10-01 发布日期:2015-04-20

Structural optimization design method with frequency forbidden zone using evolution strategy

CHENG Shasha, SU Guoshao, YAN Liubin   

  1. Key Laboratory of Disaster Prevention and Structural Safety, School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
  • Online:2013-10-01 Published:2015-04-20

摘要: 有频率禁区的桁架结构优化设计是在结构保证静态强度的前提下,通过调整构件的截面或节点坐标来改变结构的动力特性,从而避开激振频率带宽。自适应协方差矩阵进化策略(CMA-ES)算法是一种寻优效率高、鲁棒性好的全局优化算法,对处理复杂的非线性多维度的优化问题有很好的适应性。在考虑工艺可行性的基础上,结合有限元分析软件,提出了基于CMA-ES算法的有频率禁区的桁架结构优化设计方法。算例研究表明,该方法是可行的,与传统优化方法、粒子群优化方法相比较,具有全局寻优性能好、效率高的优点。

关键词: 频率禁区, 结构优化, 桁架, 自适应协方差矩阵进化策略算法(CMA-ES)

Abstract: For depart frequency bandwidth, the method is to adjust component sections or nodes’ coordinates to change the dynamic characteristics on premise of static intensity being satisfied, so called optimization design of truss structure with frequency forbidden zone. Covariance Matrix Adaptation Evolution Strategy(CMA-ES), which is a global optimization algorithm with the advantages of high efficiency and robustness, has become a powerful tool for solving highly nonlinear multidimensional optimization problems. Combining finite element method, an optimal method of truss structure with frequency forbidden zone based on CMA-ES algorithm is proposed. The results of examples show that the method is feasible and has the merits of excellent global optimization performance and efficiency compared with traditional and Particle Swarm Optimization(PSO) method.

Key words: frequency forbidden zone, structural optimization, truss, Covariance Matrix Adaptation Evolution Strategy(CMA-ES) algorithm