摘要
为了解决汽轮机叶轮受到汽流等激振作用时产生共振现象造成汽轮发电机组动静碰摩等故障,甚至更为严重的机组事故问题,本文基于共振法原理,对汽轮机模拟叶轮进行调频激振,提出一种以布置于叶轮上的细沙来表示模拟叶轮振型的模态测试实验分析方法,并将实验振型与解析计算和有限元计算结果进行对比分析,验证实验可靠性.研究表明,应用所提的实验方法可以直观准确地反映汽轮机模拟叶轮的振型,分别为轮盘系统的振动特性分析与制造加工提供实验基础与技术支持.
To solve the problem of turbine stator rub and even serious accident arising from the excitation resonance, frequency modulation excitation of a simulated turbine impeller was carried out based on the resonance principle. An experimental analytic approach is presented by arranging fine sand on impeller to simulate the vibration mode of impeller. Comparing with the finite element calculation, the results show that this experimental method can intuitively and accurately reflect the vibration of simulated turbine impeller. It may provide technical support and experiment basis for the vibration characteristic analysis and manufacturing process of the roulette system.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第9期1298-1302,1314,共6页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金重点资助项目(51335003)
国家自然科学基金资助项目(51275081)
沈阳市科技计划高新技术产业发展与科技攻关计划项目(F13-01-21-00)
关键词
叶轮振型
模态分析
共振法
有限元分析
振型测试
impeller vibration type
modal analysis
resonance method
finite element analysis
vibration type test
