文章摘要
孙志斌.带有缺陷的轴流水轮机叶片的动力特性分析[J].江西水利科技,2015,(1):30-34
带有缺陷的轴流水轮机叶片的动力特性分析
Dynamic behavior analysis of axial-flow turbine blades added dynamic stress
  
DOI:
中文关键词: 轴流叶片  动应力 缺陷  动态特性
英文关键词: Axial-flow turbine blade  Dynamic stress  Defect  Dynamic behavior
基金项目:
作者单位
孙志斌 江西省水利科学研究院
江西省水工安全工程技术研究中心 
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中文摘要:
      流体交变载荷产生的动应力是产生叶片裂纹的重要因素,严重影响了电站的安全生产和机组的稳定运行。本文通过加载交变动应力的瞬态强度分析,研究了缺陷叶片的动应力幅值及缺陷位置处的应力集中现象,量化出缺陷叶片在缺陷处的应力集中数值。本文在对比正常叶片和缺陷叶片之间存在的固有频率差异前提下,通过CFD数值计算和FEM强度分析,获得了两种叶片出现最大动应力时刻的危险点,并对比了它们动应力幅值差异。
英文摘要:
      The dynamic stress produced by fluid alternating load is the important factor of appearing blade cracks,which seriously affected the station safety and the stable operation of the unit.Based on analyzing the transient intensity of loading alternating dynamic stress,the dynamic stress amplitude of the defect blade and stress concentration phenomenon of defect location are studied.The stress concentration values of the defects at the defect turbine blade is calculated.Based on comparing the natural frequency difference between normal blade and defect blade and through CFD numerical calculation and intensity analysis of FEM,the dangerous points of maximum dynamic stress on this two kinds of blades appeared and the dynamic stress amplitude difference between them is compared.
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