某泵站厂房振源识别与振动成因  

Identification of vibration source and causes of vibration in a pumping station building

作　　者：李航[1] 沈振中[1] 马保泰 姚皓铮 LI Hang;SHEN Zhenzhong;MA Baotai;YAO Haozheng(College of Water Conservancy&Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《南水北调与水利科技（中英文）》2020年第5期151-156,共6页South-to-North Water Transfers and Water Science & Technology

摘　　要：针对某灌溉泵站水泵多机组运行时输水管道中产生涡带、涡流及水力脉动等流体现象,致使泵站厂房产生较大振动的问题,通过建立泵站厂房结构的三维有限元模型,应用ABAQUS软件和Lanczos方法提取泵站厂房结构模态,分析泵站厂房的自振频率和振型,探究厂房产生振动的振源和振动成因,从而确定泵站厂房可能振源的产生机理、频率特征,并与该泵站机组主要激振源频率的理论计算值校核分析,确定振源。结果显示:该泵站机组激振源频率和厂房结构的若干阶自振频率存在共振现象。此研究成果可为该泵站厂房维修和补强加固提供理论依据。In order to solve the problem of vortex belt,vortex and hydraulic pulsation in the water delivery pipeline of an irrigation pump station when multiple units are running,the pump house has a large vibration.Through the establishment of a threedimensional finite element model of the structure of the pumping station building,using ABAQUS software and Lanczos method to extract the structural mode of the pumping station building,the natural vibration frequency and vibration mode of the pumping station building are analyzed.The vibration source and the cause of the vibration of the power house are determined,and the possible vibration source and frequency characteristics of the pumping station are determined.The vibration source is verified and analyzed with the theoretical calculation value of the main excitation source frequency of the pumping station unit.The results show that:there is resonance phenomenon between the excitation source frequency of the pumping station unit and the natural vibration frequency of the powerhouse structure.The research results can provide a theoretical basis for the maintenance and reinforcement of the pumping station.

关 键 词：泵站 振源 有限元法 LANCZOS方法 成因分析 

分 类 号：TV314[水利工程—水工结构工程]