水利学报2017，Vol.48Issue(9)：1118-1125,8.DOI:10.13243/j.cnki.slxb.20170178
水力机械运行中的拍振和共振问题探讨
Study on the issues of beat vibration and resonance in hydraulic machinery
摘要
Abstract
Beat vibration and resonance are common natural phenomena and they have great danger to the stable operation of turbine.But there is confusion about differences between beat vibration and resonance,and some false signals of beat vibration could not be recognized.It is necessary to study these issues and provide foundation for solving the unstable problems of turbine.The basic principle of beat vibration wave is introduced,and the frequency and amplitude of beat vibration are illustrated by analyzing several special cases.The basic features of beat vibration and resonance are analyzed as well as the differences of disturbing frequency and natural frequency.It is found that,resonance will not occur if the disturbing frequency is close to the natural frequency or if two different disturbing waves have the same frequency.Besides,unsound collected signals and high frequency carrier wave could cause false beat vibration.The method of avoiding false beat vibration by increasing collecting frequency,as well as the method of recognizing and identifying the beat vibration wave according to its natural features,are given out.关键词
水力机械/压力脉动/拍振/共振/拍频/扰动频率/固有频率Key words
hydraulic machinery/pressure fluctuation/beat vibration/resonance/beat frequency/disturbing frequency/natural frequency分类
建筑与水利引用本文复制引用
徐洪泉,廖翠林,王万鹏,李铁友..水力机械运行中的拍振和共振问题探讨[J].水利学报,2017,48(9):1118-1125,8.基金项目
中国水利水电科学研究院科研专项(HM0145B45B432016) （HM0145B45B432016）
