重力坝动水压力模型试验的数值重构研究  

Numerical reconstruction research on hydrodynamic pressure model test for gravity dam

作　　者：王铭明[1,2] 陈健云 WANG Mingming;CHEN Jianyun(Faculty of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116023,China)

机构地区：[1]昆明理工大学电力工程学院,昆明650500 [2]西安理工大学,省部共建西北旱区生态水利国家重点实验室,西安710048 [3]大连理工大学,近海与海岸工程国家重点实验室,辽宁大连116023

出　　处：《振动与冲击》2020年第10期192-197,227,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51669008,51969010);国家重点研发计划项目(2017YFC0404903);省部共建西北旱区生态水利国家重点实验室开放基金课(KFKT-15)。

摘　　要：由于试验设备及模型材料的限制,在重力坝动力模型试验中采用在坝体模型上游安置水箱内盛满水的方法模拟重力体-库水系统相互作用的效果存在误差。为此,采用流固耦合模型对重力坝动水压力模型试验进行数值重构分析的方法,研究了用上游水箱中盛满水模拟地震作用下原型库水对坝体动力作用产生误差的原因。研究结果表明,水箱内水体密度及可压缩性是导致试验中坝体-水库系统相互作用效果偏小的两个原因,其水体密度偏小更为主要因素。据此,提出了修正上述误差的三种可行且准确的方法。Due to restrictions on experimental equipment and model material, there is certain error in the dam-reservoir interaction simulated by placing water-filled tank on the upstream side of dam model in the dynamic model test of gravity dam. For this reason, the error analysis was performed by numerical reconstruction of hydrodynamic pressure model test adopting the fluid-solid coupling model. It was found that the water compressibility and its low density are the reason for the error. Among which the water density is smaller is the more important factor. Then three feasible error modified methods were proposed by numerical analysis.

关 键 词：数值重构 动水压力 模型试验 模型材料 坝体-库水相互作用 

分 类 号：TV122[水利工程—水文学及水资源]