高拱坝减震控制的动力耦合理论与数值仿真  

Theory and numerical simulation of multi-field dynamic coupling of high arch dam seismic control

作　　者：刘浩吾[1,2] 陈江[1] 杨朝晖[3] 孙曼[4] 

机构地区：[1]四川大学水利水电学院,成都610065 [2]四川大学水力学与山区河流开发保护国家重点实验室,成都610065 [3]阿拉斯加大学,安克雷奇,工学院 [4]四川大学电气信息学院,成都610064

出　　处：《水力发电学报》2009年第5期163-168,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金重大研究计划"重大工程的动力灾变"培育项目(90715026)

摘　　要：提出了高拱坝气幕减震控制的动力耦合理论和非线性三场耦合数值仿真方法,能适用于耦合场的一般条件,包括气体的状态方程及其非线性和热力学特性。基于动力增量方法,构建了非线性三场耦合的有限元算法。完成了高305m锦屏双曲拱坝的气幕控震的时程分析,计算结果较为合理可信,在相当程度上验证了理论方法的正确性;同时表明,气幕控震削减动水压的效能十分显著,可达75%-90%。A theory and numerical simulation method of liquid-gas-solid multi-field dynamic coupling of high arch dam seismic control are presented. The theory can be applied to the general conditions of multi-field coupling, including the equation of state of gas and its thermodynamic characteristics and nonlinearity. By adopting the dynamic increment approach, a finite element method is constructed for the solution of nonlinear multi-field coupling, and it is applied to the time domain analysis of air-cushion seismic control for Jinping arch dam, a double-curvature dam of 305m in height. The computational results seem convincing, which verifies the theory and solution to a considerable extent. The results suggest that the technique of air-cushion isolation can remarkably reduce the hydrodynamic pressure on a high dam by 75 % - 90 %.

关 键 词：结构动力学 高拱坝减振控制 气幕隔震 液-气-固多场动力耦合理论 动水压力 

分 类 号：TV312[水利工程—水工结构工程]