华北水利水电大学学报（自然科学版）2025，Vol.46Issue(5)：53-59,7.DOI:10.19760/j.ncwu.zk.2025073
地心泵站水泵压力脉动激励下厂房振动特性分析与评价
Analysis and Evaluation of Powerhouse Vibration Characteristics Induced by Pressure Pulsation of Pumping Units in Dixin Pumping Station
摘要
Abstract
[Objective]In order to investigate the effect of pressure pulsation of pumping units on the structure of the Dixin pumping station powerhouse of the Beibu Gulf Water Resources Allocation Project,this study analyzes and evaluates the vi-bration characteristics of the powerhouse induced by pressure pulsation of the pumping units in Dixin pumping station.[Method]Pressure pulsation loads obtained from the model test were applied to the full flow passages of the 3#and 4#unit sections of the pumping station powerhouse.The loads were treated as a harmonic load,and the structural vibration response of the powerhouse was calculated under different pressure pulsation frequencies using the harmonic response analysis method.The structural safety was analyzed and evaluated according to the control standards of powerhouse structural vibration.[Results]The results showed that the vibration response of the powerhouse under normal head was much smaller than that under abnormally low head.The vibration response amplitude under low-frequency excitation was larger than that under high-frequency excitation.Under low-frequency excitation,the vibration response was mainly in the vertical direction,while under high-frequency excitation,significant horizontal vibration occurred.The largest vibration response was observed at the genera-tor-level floor,near the hole of the crane and at the upper foundation of the machine pier.[Conclusion]Under abnormal low head condition,vibration acceleration exceeds human health standards,and vibration mitigation measures should be imple-mented during operation.The vibrations of each floor plate are relatively pronounced when the excitation frequency is 9 times and 18 times the rotational frequency.The maximum vibration response of the floor plate is observed at the windshield level.关键词
泵站厂房/压力脉动/谐响应分析/振动特性/安全评价Key words
pumping station powerhouse/pressure pulsation/harmonic response analysis/vibration characteristics/safety evaluation分类
建筑与水利引用本文复制引用
刘帅,邓舒文,高琳,王玉川,樊红刚..地心泵站水泵压力脉动激励下厂房振动特性分析与评价[J].华北水利水电大学学报（自然科学版）,2025,46(5):53-59,7.基金项目
国家自然科学基金项目(51879140) （51879140）
广东粤海粤西供水有限公司科技项目(CD88-ZJ10-2022-0045). （CD88-ZJ10-2022-0045）
