基于确定性模型的渡槽材料参数反演分析

Back Analysis of Material Parameters of Aqueduct Based on Deterministic Model

针对传统反演方法分析各分量时不能很好反映实际情况的问题,提出以气温和水温为边界条件确定温度分量,并考虑短期水荷载对时效分量的影响,建立渡槽运行期位移确定性监测模型。依托克孜河渡槽充水试验位移监测资料,利用Midas软件、多元回归分析及Fortran程序计算得到渡槽位移监测模型各分量因子表达式及各测点的弹性模量、温度膨胀系数。结果表明,模型各分量结果均具有较高精度,各分量对槽身竖向位移的影响大小为水压>温度>时效;基于此得到的渡槽材料参数更加符合实际,计算过程明了可靠,该方法具有一定理论意义及参考价值。

Aiming at the shortcoming that the traditional inversion method cannot reflect the actual situation well when analyzing each component,this paper proposes to determine the temperature component with air temperature and water temperature as the boundary conditions.Considering the impact of short-term water load on the time-dependent component,displacement deterministic monitoring model in operating period was established.Relying on the displacement monitoring data of the water filling test of the Kezi River aqueduct,Midas software,multiple regression analysis and Fortran program were used to calculate the component factors of the aqueduct displacement monitoring model and the elastic modulus and temperature expansion coefficient of each measuring point.The results show that the results of each component of the model have high accuracy and influence of each component on the vertical displacement of the tank body is ranked as water pressure>temperature>aging;The material parameters of the aqueduct obtained are more realistic,and the calculation process is clear and reliable.Thus,this method has certain theoretical significance and reference value.