泵房结构动力参数反演的模型分析

泵房结构的动力结构参数反演对于评价泵房结构的健康状态尤为重要,以淮安三站为工程背景,进行泵房结构的动力参数反演。根据现场的实测一阶频率及实测的加速度峰值,基于改进遗传算法进行泵房结构的参数反演,并通过比较简化模型及弹簧约束两种模型对反演泵房结构材料参数结果的影响,得到更为合理的计算模型。该模型更加符合工程实际概况,提高了有限元正分析的精确度,从而为反演分析建立良好基础。计算结果证明,和简单模型相比较,弹簧约束模型更符合实际情况,计算结果更准确。

The model analysis on dynamic parameters inversion of pump room structure

Dynamic parametric inversion plays an essential role in evaluating the health ststus of pump room structure, Huai''an third station was taken as the engineering background for pump structure dynamic parameter inversion. According to the measured first order frequency and the measured acceleration peak value, parameter inversion of pump room structure was carried out on bases on improved genetic algorithm. The more reasonable calculation model was obtained by comparing the effects of the material parameters of pump structure inversion between simplified model and spring constraint model. Reasonable calculation model was more in line with the actual situation of the project and could improve the accuracy of finite element analysis, so as to establish a good foundation for the inversion analysis. The results show that the spring constraint model is more realistic and the result is more accurate than the simple model.