高HD值压力管道取消伸缩节地震动力分析  

Seismic Dynamic Analysis on Canceling Expansion Joints of Penstock with High HD Value

作　　者：吴海林[1] 杨威妮[1] 周宜红[1] 

机构地区：[1]三峡大学水电工程施工与管理湖北省重点实验室,湖北宜昌443002

出　　处：《水电能源科学》2009年第4期100-103,共4页Water Resources and Power

基　　金：教育部科学技术研究基金资助重点项目(208092);三峡大学科学基金资助项目(0620070006)

摘　　要：针对大型水电站厂坝间设置伸缩节造价高、制造、施工、维护难、运行期止水技术问题突出,采用三维有限元法建立了某大型水电站的有限元整体模型,分析评价了保留和取消伸缩节两种方案的自振特性,采用振型分解反应谱法计算分析了外包软垫层的伸缩管过缝方案在Ⅷ度设防烈度下的动力响应,并将地震动力响应与静力计算结果叠加,综合评价了伸缩管过缝结构的安全性,为取消压力管道伸缩节的可行性分析提供了依据。An overall finite element model of a large scale hydropower station is established by three-dimensional finite element method. Firstly,modal analysis is made,which evaluates the vibration characteristics of two schemes, namely retaining expansion joints and canceling expansion joints. And then, under the action of 8 degrees earthquake,dynamic response of expansion pipe is calculated by using mode-superposition response spectrum method. Finally,with the superposition of the seismic dynamic response and the results of static calculation,comprehensive safety evaluation of expansion pipe is made, so a basis for studing the feasibility of canceling expansion joints is provided.

关 键 词：大型水电站 压力管道 伸缩节 有限单元法 动力分析 

分 类 号：TV741[水利工程—水利水电工程] TV732.44