基于Preisach滞后模型的地面沉降预测分析

Forecasting analysis of land subsidence based on the Preisach hysteretic model

针对由抽水引起的地面沉降的滞后现象,本文充分利用控制理论中的Preisach模型的非线性迟滞特点,建立了地面沉降的Preisach滞后模型,应用到地面沉降的模拟和预测中。实例分析表明,Preisach滞后模型应用到地面沉降预测上是可行的,模型具有预测精度高、计算效率高的优点,对抽水引起的地面滞后性沉降的模拟和预测具有可操作性。

Considering the hysteresis of land subsidence caused by groundwater overpumping,a Preisach model of land subsidence is proposed based on the characteristics of the Preisach model of nonlinear hysteresis in control theory. The calculation results show that the Preisach model is a feasible approach for land subsidence.The application shows that it is of the advantage of high accuracy and efficiency of forecasting,and it has practical value in prediction of land subsidence caused by groundwater overpumping.