摘要
以拉西瓦拱坝为工程背景,采用加重橡胶,建立了大比尺(1∶100)的水弹性模型,全面模拟了"坝体-地基-库水-动荷载"四位一体流固耦联的振动系统。利用该水弹性模型,采用先进的测试手段和数据分析处理软件,对拉西瓦拱坝的模态以及多种泄洪工况下拱坝的振动响应进行全面的测试和分析。采用流激振动反分析方法,求得泄洪振动的等效荷载,得到整个结构的动力响应,最后对泄洪诱发的坝体振动影响作出了评估。
Scale effect exists in the model experiment, so large-scale model is generally utilized to reduce the scale effect. Based on Laxiwa arch dam, the hydroelastic model with a scale of 1：100 is built, which is made of weighted rubber. The fluid-structure coupling system consisted of dam, foundation, water and fluctuatinon pressure is simulated overall. Some advanced testing equipment, technique and data processing software were used. O- verall test and analysis of the modals and vibration response of dam and appurtenant structure under several working conditions were performed. The equivalent load is determined by inverse analysis method for flow induced vibration, then the dynamic response of the dam is obtained and influence of flow-induced vibration is assessed .
出处
《中国工程科学》
2008年第11期23-29,共7页
Strategic Study of CAE
基金
国家杰出青年科学基金项目(50725929)
国家自然科学基金项目(50539060
50679052)
关键词
拉西瓦拱坝
水弹性模型
流激振动
振动响应
反分析
Laxiwa arch dam
hydroelastic model
flow-induced vibration
vibration response
inverse analysis
