显式算法中三维黏弹性人工边界应用及输水隧洞动力响应分析OACSTPCD

In order to ensure the stability and efficiency of dynamic response analysis of large and complex three-dimensional finite element models combined with two-dimensional viscoelastic boundary theory and its stability improvement method in the explicit analysis of dynamics a three-dimensional viscoelastic artificial boundary method suitable for ABAQUS/Explicit module is proposed and the vibration characteristics of high-speed train vibration load on existing hydraulic tunnels are studied on the basis of three-dimensional viscoelastic boundaries based on the interchange project of a water transmission tunnel and adjacent high-speed rail tunnels.The results show that when the dynamic explicit analysis is adopted the viscoelastic artificial boundary with improved stability has a good energy absorption effect which satisfies the resilience energy of distant foundations the dynamic influence of vibration load on water conveyance tunnel decreases with the increase of operating distance and the extreme values of dynamic response of each section appear in the center of bottom plate.