华侨大学学报（自然科学版）Issue(1)：1-6,6.DOI:10.11830/ISSN.1000-5013.2016.01.0001
斜裂纹转子刚度特性分析
Stiffness Characteristics Analysis of a Rotor With Slant Crack
摘要
Abstract
The stiffness matrix of the slant crack was obtained based on material mechanics and fracture mechanics theory through the use of strain energy release rate method.While the crack is fully open,the influence of the crack angle,the axial slenderness ratio and the crack depth on the stiffness of the shaft was discussed.At the same time,the opening and closing conditions in the rotating state and the stiffness change law of the corresponding shaft were studied.The results show that,when the crack is in the fully open state,the stiffness of the crack decreases with the increase of the crack an-gle.And the shaft stiffness changes more significantly with the increase of the crack depth;when the crack is in the open-ing and closing state,with the increase of the crack depth,the shaft stiffness is no longer decreases,but there is a certain law of fluctuation,which is time-varying characteristics,in this case,the shaft coupling vibration also increases,the dy-namic characteristics of the rotor becomes increasingly complex.关键词
斜裂纹/转子刚度/时变特性/开裂纹/呼吸裂纹Key words
slant crack/rotor stiffness/time-variant characteristics/open crack/breaking crack分类
机械制造引用本文复制引用
李志农,夏恒恒,肖尧先..斜裂纹转子刚度特性分析[J].华侨大学学报（自然科学版）,2016,(1):1-6,6.基金项目
国家自然科学基金资助项目（51265039，51075372，50775208）；江西省研究生创新专项资金资助项目（YC2014-S390）；江西省教育厅科技计划项目（GJJ12405）；重庆大学机械传动国家重点实验室开放基金 （）
