水利学报2017，Vol.48Issue(9)：1073-1081,9.DOI:10.13243/j.cnki.slxb.20170592
挡水结构水下爆炸作用的离心模型试验
Centrifuge modeling on dynamic response of water retaining structure by underwater explosion
摘要
Abstract
Underwater explosion consists of two procedures,i.e.shock wave and bubble oscillation,both of which take up approximately 50 ％ of the explosive energy and would cause severe damage to structures.A satisfaction in similarities of both shock wave and bubble oscillation is only possible in centrifuge.Container for underwater explosion in centrifuge should be as large as possible to minimize boundary effects.Shock wave,bubble oscillation,and the induced dynamic responses of structure are recorded by water pressure sensor,high speed camera,accelerometers and strain gauges.This paper compares the difference between the shock load and dynamic responses of air blast and underwater explosion.Then,by changing the centripetal acceleration,gravity effects on the bubble impulse are investigated.The research also finds that there is linearity between the peak strain bubble oscillation and bubble impulse.Thus,the effects of gravity should be considered in the simulation of bubble pulse on structure.关键词
水下爆炸/冲击波/气泡脉动/离心机/冲量Key words
underwater explosion/shock wave/bubble oscillation/centrifuge/impulse分类
建筑与水利引用本文复制引用
胡晶,陈祖煜,魏迎奇,张雪东,梁建辉,黄志杰..挡水结构水下爆炸作用的离心模型试验[J].水利学报,2017,48(9):1073-1081,9.基金项目
国家自然科学基金重点项目(51339006) （51339006）
