Influence of the Water Simplification Method to U-shaped Aqueducts Dynamic Characteristic

The influence of water in aqueduct on the construction cannot be ignored when calculating the aqueduct dynamic characteristics.With an aim at some aqueduct in South-to-North Water Diversion Middle Route Project，the numerical analysis model is established on the basis of the additional mass principle and the displacement-press format of the FSI system，and also，the dynamic characteristic are analyzed.