摘要
结构损伤检测问题常常可转化为数学上的约束优化问题。采用粒子群算法(PSO)求解约束优化问题,可求解结构损伤检测问题。首先介绍基本粒子群算法,然后建立结构损伤检测问题的数学模型,采用悬臂梁单损伤和多损伤的数值仿真研究,验证了粒子群算法求解结构损伤检测问题的可行性,最后针对实际结构振型测试时振型的非完备性,直接利用非完备振型,求解损伤检测问题,数值仿真结果表明,利用非完备振型,仍可得到较好的检测结果。
Structural damage detection can often be converted into the problem of constrained optimization. Since the particle swarm optimization （PSO） algorithm is effective for the constrained optimization problem, it can also be a useful method for structural damage detection. The theory of PSO is in-st explained in this paper, and then the mathematic model of structural damage detection is proposed. The numerical simulation of a cantilever, in beth single and multi damage, shows that PSO is valid for structural damage detection. In light of the incompletion of model shapes of the real structure, the incomplete model is used to calculate the objective function. The results suggest that the method doesn＇ t need the reduction of the finite elemental model and the model shape expansion, and is successful for structural damage detection.
出处
《武汉科技大学学报》
CAS
2006年第4期415-418,共4页
Journal of Wuhan University of Science and Technology
关键词
粒子群算法
损伤检测
约束优化
悬臂梁
PSO
structural damage detection
constrained optimization
cantilever beam
