Simulation analysis theory and experimental verification of air-cushion isolation control of high concrete dams  

作　　者：LIU HaoWu ZHANG ShaoJie CHEN Jiang SUN Man SUN Lei LI Yi 

机构地区：[1]College of Hydraulic and Hydraueleetric Engineering, Sichuan University, Chengdu 610065, China [2]State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China [3]College of Electric and Information, Siehuan University, Chengdu 610065, China [4]Nuclear Power Institute of China, Chengdu 610072, China

出　　处：《Science China(Technological Sciences)》2011年第11期2854-2868,共15页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 90715026)

摘　　要：To focus on the key scientific problem of process control of dynamic catastrophe of high dams,presented for the first time are the modelling theory of liquid-gas-solid tri-phase coupling of the air-cushion isolation control of high dams and its numerical simulation method,and theoretical description of the complicated dynamics problem of the tri-phase coupling-thermodynamics state-material-contact bi-nonlinearity,as well as the simulation analysis of the key effects of dynamic catastrophe of the air-cushion isolated high dam engineering.The analytic solution of plane-wave with rigid-dam body was created.The simulation comparison of dynamic catastrophe processes of 305 m Jinping arch dam with and without seismic control was carried out,and the results were basically in agreement with that obtained from the large shaking table tests,and verify each other.The entire air-chamber and optimized air-cushion with varying thickness were presented to develop a optimization method.The large shaking table tests of the isolated dam model,which is satisfied with the basic dynamic similarity relations,were performed for the first time.The test data seemed to be convincing and were in agreement with the dynamic simulation results of the tested model,thereby providing an experimental verification to the simulation theory and method.The combination experiments of theoretical model and physical model demonstrated that the hydrodynamic pressure of high arch dams can be reduced by more than 70% as well as the first and third principle stresses of the dam body reduced by more than 20%-30%,thereby the global anti-seismic capacity of the high dam being improved significantly.The results have shown that the air-cushion isolation is the prior developing direction of structural control technology of high concrete dams.

关 键 词：air-cushion isolation of high concrete dam liquid-gas-solid multi-field coupling material-geometry bi-nonlinearity large shaking table test hydrodynamic pressure 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术] TV642[自动化与计算机技术—计算机科学与技术]