中国农村水利水电Issue(1)：140-146,151,8.DOI:10.12396/znsd.2500225
基于有限元分析的离心泵转子系统振动模态分析及强度校核
Vibration Modal Analysis and Strength Check of Centrifugal Pump Rotor System Based on Finite Element Analysis
摘要
Abstract
In order to avoid resonance in the operation of centrifugal pump rotor,based on the principle and method of modal analysis,a three-dimensional model of air and water rotor system was established by using finite element software.The vibration characteristics,stress distribution and fatigue failure of centrifugal pump rotor system during operation were discussed from three aspects:modal analysis,calculation of critical speed and fatigue characteristic analysis.The research conclusions are as follows:The blade passing frequency is 37.5 Hz,while the first and second order natural frequencies of the centrifugal pump rotor system in water are 60.78 and 60.81 Hz respectively,so the possibility of resonance of the centrifugal pump in the working process is small.The first-order critical speed and second-order critical speed of the rotor system are 592.6 and 627.4 r/min respectively,which is much larger than the rated speed,so the centrifugal pump rotor system is stable and reliable,and will not resonate during operation.According to the fatigue characteristic analysis of rotor system,the maximum stress value of blade and pump shaft is below the safe allowable stress limits,which meets the requirements of strength design.Under the action of stress amplitude,any position of the pump shaft structure can withstand 109 maximum cycles,and there is no high cycle fatigue failure under low stress during normal operation.关键词
模态分析/转子系统/临界转速/疲劳破坏/共振Key words
modal analysis/rotor system/critical speed/fatigue failure/resonance分类
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周文杰,王忠赞,路莅枫,李四伟,戴劲,党梦帆,孙典,郑源,叶长亮..基于有限元分析的离心泵转子系统振动模态分析及强度校核[J].中国农村水利水电,2026,(1):140-146,151,8.基金项目
国家自然科学基金重点项目(52339006) （52339006）
国家自然科学基金项目(52271275). （52271275）
