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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。
In order to avoid problems such as inverse pathology of the matrix generated during traditional load identification and sensitivity to initial value and accumulated error, the genetic algorithm is applied to the load identification process, and the inverse problem of this kinetics is converted into the structural dynamics which is being calculated. Genetic algorithm is used to optimize the optimal parameters to obtain the estimated load time history. Through the simulation calculation, the error of the vibration response and the measured response calculated by the identified load is 7%. The result shows that the identification method proposed in this paper is effective.