基于虚拟仪器的桩基动力学模型参数识别系统

Parameter identification system of pile foundation dynamic model based on virtual instrument

为了快捷、准确地获取桩基横向动力学模型的参数,通过建立桩基激振理论模型,并求解得到桩基测点加速度响应的理论结果;利用激振方法,用加速度传感器获取桩基测点加速度响应的试验结果;通过计算桩基测点加速度响应理论结果和试验结果的动态时间弯曲(dynamic time warping,DTW)距离的均方根,将问题转换为目标函数的寻优问题;利用遗传算法进行桩基模型参数的寻优;为解决参数识别过程中复杂数据的运算问题,实现工程实用化,通过COM组件实现MATLAB与LabVIEW混合编程,开发出一套桩基模型参数智能识别系统软件。最后,通过算例说明本研究方法是有效的,且具有工程实践意义。

In order to obtain the parameters of lateral dynamic model of pile foundation quickly and accurately,the theoretical model of pile foundation excitation was established to get the theoretical results of a cceleration response of pile foundation measuring points;the acceleration response test results of pile foundation measuring points were obtained using the excitation method by acceleration sensor;through calculating the root mean square of the dynamic time warping(DTW)distance of the theoretical and experimental results of a cceleration response of pile foundation measuring points,the problem was transformed into an optimization problem of the objective function;genetic algorithm was used to optimize the p arameters of the pile foundation model;in order to solve the operational problem of c omplex data in the process of parameter identification and realize the engineering practicality,the COM component was used to realize the mixed programming of MATLAB and L abVIEW,and a set of parameter intelligent identification system software of pile foundation model was developed.Finally,the effectiveness and engineering practical significance of the method was illustrated by an example.