中南大学学报（自然科学版）2017，Vol.48Issue(8)：2002-2009,8.DOI:10.11817/j.issn.1672-7207.2017.08.006
含拉杆裂纹的组合转子性能退化机理
Performance degradation mechanism of combined rotor considering crack in rod
摘要
Abstract
The degradation of combined rotor,as the core part of gas turbine,has great effect on gas turbine's performance.Crack of the rod is one of the main reasons which cause performance degradation of combined rotor,while few relevant study has been reported at present.In order to get combined rotor's bending natural frequency variation with time,dynamic features of combined rotor with cracked rod was analyzed considering interface contact effect.By describing degradation path of cracked rotor through defining degradation degree parameters,performance degradation quantitative evaluation of combined rotor was realized.In order to get the degradation characteristics of combined rotor,unbalance response analysis of combined rotor in different degradation degree was conducted,and the results verify the theoretical analysis at the same time.The results show that the degradation of combined rotor is extremely slow in the stable degradation stage,the significant transition point which leads to fault occurs when the degradation reaches a certain extent,and the number of rods and disks and the position of crack in the rod have great influence on the degradation of combined rotor.The results provide theoretical reference for structure design of combined rotor and determining the damage location of rotor rod.关键词
组合转子/裂纹/接触界面/退化量/固有频率Key words
combined rotor/crack/contact interface/degradation degree/natural frequency分类
机械制造引用本文复制引用
王艾伦,张海彪,李雪鹏,罗真..含拉杆裂纹的组合转子性能退化机理[J].中南大学学报（自然科学版）,2017,48(8):2002-2009,8.基金项目
国家重点基础研究发展计划(973计划)项目(2013CB035706) （973计划）
中南大学机电工程学院研究生创新项目(2014scxjj14)(Project(2013CB035706) supported by the National Basic Research Development Program (973 Program) of China （2014scxjj14）
Project(2014sexjjl4) supported by the Graduate Innovation Project of College of Mechanical and Electrical Engineering of Central South University) （2014sexjjl4）
