考虑水体压缩性的椭圆柱体地震动水压力分析  

EARTHQUAKE INDUCED HYDRODYNAMIC PRESSURE ON ELLIPTICAL CYLINDER SURROUNDED BY COMPRESSIBLE WATER

作　　者：王丕光[1] 赵密[1] 杜修力[1] WANG Pi-guang;ZHAO Mi;DU Xiu-li(Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124

出　　处：《工程力学》2018年第7期55-61,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51708010;51421005;51678015)

摘　　要：地震作用下水与柱体结构的相互作用会对结构产生动水压力,该文研究椭圆柱体的地震动水压力。首先,基于椭圆坐标系推导了椭圆柱体地震动水压力的解析解;其次,通过ABAQUS声固耦合方法验证了提出的椭圆柱体地震动水压力的解析解,算例表明两者误差在1%左右;最后,引入无量纲参数数频率、宽深比和长短轴比,定量分析了水体压缩性对地震动水压力的影响。Hydrodynamic pressure on cylinders would occur during water-cylinder interaction when the cylinders are subjected to earthquake actions.The hydrodynamic pressure on elliptical cylinders was investigated in this study.Firstly,the analytical solution for earthquake induced hydrodynamic pressure on the elliptical cylinder was derived in elliptical coordinate system.Secondly,the proposed analytical solution was verified by the acoustic-structure coupling method in commercial finite element software ABAQUS.The numerical examples indicated that the proposed analytical solutions were in good agreement with the numerical solutions.Thirdly,the influence of water compressibility on hydrodynamic pressure is analyzed quantitatively by introducing dimensionless parameters including the frequency ratio,width-depth ratio and ratio of long to short axis of the ellipse.

关 键 词：地震 动水压力 椭圆柱体 水体压缩性 辐射波浪理论 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]