高扬程泵站压力管道振动测试及分析  

Vibration Source Characteristics of High-lift Pumping Station

作　　者：刘尚蔚[1] 郭佳[1] 张建伟[1] 朱良欢 

机构地区：[1]华北水利水电大学,河南郑州450011

出　　处：《人民黄河》2016年第4期140-143,148,共5页Yellow River

基　　金：国家自然科学基金资助项目(51009066);河南省高等学校青年骨干教师资助计划项目(2012GGJS-101);河南省科技攻关项目(142102310122;142300410177;132102310320);华北水利水电大学研究生创新计划项目(YK2014-05)

摘　　要：以甘肃景电提灌工程二期泵站的代表性压力管道为对象,研究高扬程泵站压力管道的振源组成及其影响。通过理论分析并结合原型观测数据,对机组运行及开机关机过程中产生的结构振动频率进行识别,确定其动荷载来源。分别统计泵站结构主要部位振动达峰值时不同频率所占比重,计算实测工况各振源对总振动响应的贡献。结果表明:压力管道在开机启动进水瞬间主要振源是水流激励,在稳定运行期间主要振源是机械振动,在停机停水的瞬间主要振源是电磁振动。Taking the typical pressure pipe of second stage pumping station of the irrigation project in Jingdian as research object, this paperanalyzed the vibration source composition of the structure and its influence. Based on prototype observation data and theoretical analysis,structural vibration frequency during running processes, starting-up and shutdown process were identified and dynamic load source wasdetermined. Furthermore, the contributions of different frequencies were calculated when vibrations of the main measured points reached themaximum values. The contributions of the measured frequency bands energy to whole vibration response were also examined. The results showthat hydraulic excitation is the main vibration source during starting-up process; mechanical vibration is the main vibration source duringrunning process; electromagnetic vibration is the main vibration source during shutdown process.

关 键 词：高扬程泵站 压力管道 振源 振动频率 振动响应 

分 类 号：TV675[水利工程—水利水电工程]