摘要
对结构动载荷反演问题进行了灵敏度分析,将结构动态载荷表示为一系列参数的形式。针对过程中存在的不适定问题,利用遗传算法的全局寻优能力获得最佳的参数,从而确定结构的动态输入载荷。这种方法将此动力学的反问题转化为结构动力学正计算,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。仿真结果说明提出的识别方法是有效的。
Based on the response sensitivity analysis on the identification of structural dynamic load,structural dynamic load was expressed as a series of parameters. To overcome the ill-posed problem during the process,the structural dynamic input load can be determined using the optimal parameters obtained by Genetic Algorithms. In the proposed method,the dynamics inverse problem was converted into the structural dynamics analysis and calculation,this can overcome the disadvantages of illconditioned matrix inverse,accumulated error and sensitive to initial conditions,etc. The numerical simulation result shows the proposed method is feasible.
出处
《机械强度》
CAS
CSCD
北大核心
2015年第4期593-597,共5页
Journal of Mechanical Strength
基金
教育部高等学校博士学科点专项科研基金(优先发展领域)(20126102130004)资助~~
关键词
载荷识别
灵敏度分析
微种群遗传算法
Force identification
Sensitivity analysis
Micro-genetic algorithms
