摘要
水下振动台是振动台型式的一种改进,即在传统振动台系统上增建台上水池系统,反力基础仍是水下振动台系统中的重要组成部分。为研究水池系统对振动台反力基础动力响应的影响,针对河海大学水下振动台的反力基础设计方案,采用有限元动力时程法,对比分析有水、无水工况各反力基础设计方案下的动力响应,并对反力基础周边隔振措施的有效性进行分析。结果表明,台上水体会略微增大反力基础的动力响应;反力基础周围设置隔振带可有效降低反力基础外围地面的加速度响应。研究成果可为水下振动台反力基础设计提供参考。
Underwater shaking table is an improvement upon traditional shaking table.Though a water pool and its corresponding system are built out on the table,the foundation of shaking table is still an important part of the whole system.According to the underwater shaking table constructed in Hohai University,the finite element dynamic time history method was implemented to analyze the dynamic response of the foundation of shaking table and compare the dynamic response of different design schemes when water was involved or not.The results show that the water on table can increase the dynamic response of shaking table foundation slightly.Besides,whether there is water or not,the acceleration response of the ground around the foundation can be significantly reduced by placing vibration isolation belt.The research results can provide reference for the design of the foundation of shaking table.
作者
牛志伟
王若灿
郑人逢
NIU Zhi-wei;WANG Ruo-can;ZHENG Ren-feng(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Experimentation Center,Hohai University,Nanjing 210098,China)
出处
《水电能源科学》
北大核心
2019年第2期95-98,21,共5页
Water Resources and Power
基金
国家重点研发计划(2016YFC0401601)
中央高校基本科研业务费专项资金资助(2018B44914)
关键词
水下振动台
反力基础
动力响应
有限元模型分析:流固耦合
underwater shaking table
counterforce foundation
dynamic response
FEM analysis
fluid-solid coupling
作者简介
牛志伟(1979-),男,博士、副研究员,研究方向为水工结构抗震分析及振动台试验,E-mail:nzw@hhu.edu.cn.
