基于混合优化策略的结构损伤识别方法

Structure Damage Identification Based on Hybrid Optimization Strategy

根据结构损伤后的动力特性 (包括频率和振型 )实测数据 ,提出了基于混合优化策略的结构损伤识别方法 .所建立的混合优化策略将收敛速度快的局部优化搜索方法与具有全局搜索能力的人工神经网络方法相结合 ,解决了局部优化搜索方法的局部极值问题和全局优化搜索方法收敛速度慢的问题 .

Based on hybrid optimization strategy, the parameter identification algorithm was presented according to the measured data on vibrating frequency and mode shapes in the damaged structure. The proposed algorithm combines the local optimum method which has fast convergence ability, with the neural networks which have global optimum ability. By doing this, the local minimization problem from the local optimum method can be solved, and the convergence speed from the global optimum method can be improved. The research has a practical significance for the solution of non-uniqueness and instability of inverse problem.