一种基于遗传算法的时域内稳态动载荷识别方法  

A genetic algorithm based method for steady-state dynamic force identification in time domain

作　　者：常晓通[1] 闫云聚[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,西安710129

出　　处：《应用力学学报》2012年第3期274-277,352,共4页Chinese Journal of Applied Mechanics

摘　　要：为避免传统载荷识别过程中产生的矩阵求逆病态和对初值敏感及累计误差等问题,将遗传算法应用到载荷识别过程中,将此动力学的反问题转化为结构动力学正计算,并且利用遗传算法进行寻优得到最优参数,从而得到待识别载荷时间历程的估计。通过仿真计算,所识别载荷计算振动响应与测量响应的误差为7%,结果表明本文提出的识别方法是有效的。The traditional methods for dynamic force identification are often ill-posed or ill-conditioned.Thus,it is hoped that the genetic algorithm based method proposed in this paper can overcome these disadvantage.The inverse problem is converted to regular structural dynamics and the estimation of the load-time history can be obtained on condition the optimal parameters is found and optimized by genetic algorithm.By numerical simulation,the error between the calculated response and the actual response is about 7%,which shows the effectiveness of the proposed method.

关 键 词：动态载荷识别 时域分析 优化 遗传算法 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程]