基于流固耦合的高耸进水塔动水压力分布研究

英文篇名：Study on Hydrodynamic Pressure Distribution of High Intake Tower Based on Fluid-structure Interaction
中文刊名：水力发电
英文刊名：Water Power
作者：黄虎 ; 李昇 ; 张建伟
英文作者：Huang Hu1 ; Li Sheng2 ; Zhang Jianwei1(1.North China University of Water Resources and Electric Power ; Zhengzhou 450011 ; Henan ; China ; 2.Hydropower and Water Resources Planning and Design General Institute ; Beijing 100120 ; China)
中文关键词：进水塔 ; 流固耦合 ; 动水压力 ; 非线性分布
英文关键词：intake tower ; fluid-structure interaction ; hydrodynamic pressure ; nonlinear distribution
出版日期：2012-06-12
机构：华北水利水电学院水利学院;水电水利规划设计总院;
年：2012
期：06
出版单位：水力发电

摘要

根据水体的不可压缩假定,计入重力波和水体自由表面影响,采用流固耦合理论结合时程分析法对高耸进水塔结构动响应进行研究,结果表明,在地震荷载作用下,水体对水中结构的影响具有明显的非线性。水体不仅产生一定的附加质量作用,同时还存在一定的惯性耦合作用;进水塔动水压力沿高程呈非线性分布,且塔体内外同高程动水压力值不同,但沿高程分布曲线的包络线都呈近似半双曲线形式,动水压力最大值出现在水体自由表面以下一定距离处。所得结论对正确认识结构在地震荷载的反应、指导结构设计有重要意义。
The distribution of hydrodynamic pressure of high intake tower is analyzed by using fluid-structure interaction theory and time-history method after assuming the water body can not be compressed and considering the effects of gravity waves and water free surface.The results indicate that the interaction between water and structure is nonlinear under the action of seismic loads.The water not only acts in the form of the added mass,but also the inertial coupling effect.The distribution of hydrodynamic pressure is nonlinear along the elevation of intake tower,and the hydrodynamic pressure is different at the outside and inside of tower with same elevation.The envelope curve of hydrodynamic distribution is closed to half-hyperbola,and the maximum hydrodynamic pressure has a certain meters below the free surface of water body.The study is significant to correctly understand the responses of structure to seismic loading and guides the structural design.

引文

[1]张社荣,黄虎.考虑地震行波效应的大型水电站高耸进水塔群响应分析及碰撞研究[J].水利学报,2009,40(9):1120-1126.
    [2]邱流潮,张立翔.地震作用下拱坝_库水耦合振动动水压力分析[J].水动力学研究与进展A,2000,15(1):94-103.
    [3]缪国平,刘应中.水波及其与结构物的相互作用[J].水动力学研究与进展A,2000,15(2):156-162.
    [4]黄信,李忠献.动水压力作用对深水桥墩地震响应的影响[J].土木工程学报,2011,44(1):65-73.
    [5]席仁强,陈国兴,王志华.考虑流固耦合的水中结构物地震反应方法[J].世界地震工程,2009,25(2):60-67.
    [6]陈江,张少杰,闵兴鑫.坝体-库水相互作用的流固耦合分析[J].西南科技大学学报,2009,24(1):13-19.
    [7]岳宝增,刘延柱.带自由液面Navier-Stokes流动问题的ALE分步有限元方法[J].水动力学研究与进展:A辑,2003,18(4):463-469.
    [8]陈大宏,李炜.自由表面流动数值模拟方法的探讨[J].水动力学研究与进展:A辑,2001,16(2):216-223.
    [9]王国辉,柴军瑞,杜成伟.坝库系统流固耦合数值分析方法简述[J].水利水电科技进展,2009,29(4):89-93.
    [10]王建军,李其汉,朱梓根,等.自由液面大晃动的流固耦合数值分析方法研究进展[J].力学季刊,2001,22(4):447-54.
    [11]王进廷,杜修力,张楚汉.重力坝-库水-淤砂-地基系统动力分析的时域显示有限元模型[J].清华大学学报:自然科学版,2003,43(8):1112-1115.
    [12]Westergaard H M.Water Pressures on Dams During Earthquakes[J].Trans,Amer.soc.Civ.Eng,1933,98:418-433.
    [13]Chora A K.Hydrodynamic pressures on dams during earthquake[J].J.Eng.Mech.Div.,ASCE,1967,93(EM6):205-223.
    [14]Chopra A K,Chakrabarti P.Earthquake analysis of concrete gravitydams including dam-water-foundation interaction[J].EarthquakeEngng.Struct.Dyn.,1981,9(4):363-383.
    [15]王进廷.高混凝土坝-可压缩库水-淤砂-地基系统地震反应分析研究[D].北京:中国水利水电科学研究院,2001.