高拱坝气幕隔震效果的三维数值模拟  

3D numerical simulation of air-cushion isolation effects on high arch dams

作　　者：陈江[1] 张少杰[1] 刘浩吾[1] 

机构地区：[1]四川大学水电学院,成都610065

出　　处：《振动与冲击》2009年第11期134-138,209,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金重大研究计划资助项目(批准号:90715026)

摘　　要：对锦屏一级拱坝进行了气幕隔震效果的三维数值模拟,其中气幕单元采用拉格朗日法中的位移格式,库水单元采用欧拉法中的压力场格式,坝体与气幕的交界面自动满足位移协调条件,气幕与库水交界面满足力的平衡条件。数值仿真结果表明:气幕显著降低了上游坝面的动水压力,气幕厚度越大,隔震效果越好。与无气幕时相比,气幕厚度为1 m、3 m、5 m时,动水压力分别降低了77.1%、83.3%、87.7%,位移反应也相应降低。因此,气幕隔震技术在水工建设中有很好的推广前景。3D numerical simulation was carried out for Jinping arch dam to discuss the effect of air-cushion isolation.The displacement formulation in Lagrangian approach and the pressure formulation in Eular approach were applied to air-cushion and reservoir respectively.The displacement compatibility was satisfied automatically on the interface between dam and air-cushion.The force equilibrium condition was satisfied on the interface between air-cushion and reservoir.Numerical simulation results show that the air-cu...

关 键 词：动水压力 气幕隔震 高拱坝 流固耦合 

分 类 号：TV642.4[水利工程—水利水电工程]