洪屏抽水蓄能电站地下厂房结构动力响应分析  

Analysis on Dynamic Responses of Underground Powerhouse Structure of Hongping Pumped-storage Station

作　　者：刘建[1] 伍鹤皋[1] 傅丹[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《水力发电》2014年第8期109-112,共4页Water Power

基　　金：国家自然科学基金资助项目(51179141);国家自然科学基金资助项目(51309030)

摘　　要：结合洪屏抽水蓄能电站地下厂房实际,建立三维有限元模型,采用模态分析方法分析厂房结构的自振特性,基于谐响应法分析地下厂房结构在各种工况机组动荷载作用下的动力响应,并根据国内相关文献及国外的相关标准提出了振动控制标准。研究结果表明,洪屏地下厂房结构自振频率较高,出现厂房整体性振动的可能性较小;在机组振动荷载作用下机墩和楼板结构的振动响应较大,但机墩和楼板结构的振幅、振动速度和加速度等均在允许范围内,地下厂房结构的设计是合理的。The three-dimensional finite element model for the underground powerhouse of Hongping Pumped-storage Power Station is established to analyze the natural vibration characteristics of powerhouse structure by using modal analysis method, and the dynamic responses of the powerhouse structure under a variety of operation conditions are studied by means of harmonic response analysis method. The vibration control standards are also proposed for the powerhouse in accordance with relevant domestic studies and foreign standards. The results show that the structure of Hongping underground powerhouse has high natural vibration frequencies and the overall vibration of powerhouse structure is less likely to appear, and the dynamic responses of generator pedestal and floor structures under generating units＂ dynamic loads are bigger than the other structures of powerhouse, but the amplitude, speed and acceleration of vibration are within allowable range. The design of underground powerhouse structure is reasonable.

关 键 词：地下厂房 自振特性 动力响应 振动标准 洪屏抽水蓄能电站 

分 类 号：TV743[水利工程—水利水电工程] TV731.6