[1]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),2016,37(1):1-6.[doi:10.11830/ISSN.1000-5013.2016.01.0001]
　LI Zhinong,XIA Hengheng,XIAO Yaoxian.Stiffness Characteristics Analysis of a Rotor With Slant Crack[J].Journal of Huaqiao University(Natural Science),2016,37(1):1-6.[doi:10.11830/ISSN.1000-5013.2016.01.0001]
点击复制

斜裂纹转子刚度特性分析()
分享到：

《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第37卷
期数:
2016年第1期
页码:
1-6
栏目:
出版日期:
2016-01-03

文章信息/Info

Title:
Stiffness Characteristics Analysis of a Rotor With Slant Crack
文章编号:
1000-5013(2016)01-0001-06
作者:
李志农;  夏恒恒;  肖尧先
南昌航空大学 航空制造工程学院, 江西 南昌 330063
Author(s):
LI Zhinong;  XIA Hengheng;  XIAO Yaoxian
School of Aeronautical Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China
关键词:
斜裂纹;  转子刚度;  时变特性;  开裂纹;  呼吸裂纹
Keywords:
slant crack;  rotor stiffness;  time-variant characteristics;  open crack;  breaking crack
分类号:
TH133
DOI:
10.11830/ISSN.1000-5013.2016.01.0001
文献标志码:
A
摘要:
在材料力学和断裂力学的基础上,运用应变能释放率的方法,得出斜裂纹的刚度矩阵.讨论在裂纹全开的状态时,裂纹倾角、轴细长比和裂纹深度对转轴刚度的影响,并对裂纹处于旋转时的开闭情况及相应轴的刚度变化规律进行研究.结果表明:当裂纹处于全开状态时,随着裂纹倾角的增大,裂纹的刚度随之减小,轴刚度的变化随着裂纹深度的增大更加显著;当裂纹处于开闭状态时,随着裂纹深度的增加,轴的刚度不再一直减小,而是有一定规律的波动,即时变特性,此时,轴的耦合振动随之增强,转子的动力特性变得愈加复杂.
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 angle. And the shaft stiffness changes more significantly with the increase of the crack depth; when the crack is in the opening 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 dynamic characteristics of the rotor becomes increasingly complex.

参考文献/References:

[1] GASCH R.A survey of the dynamic behavior of a simple rotating shaft with a transverse crack[J].J Sound and Vibration,1993,160(2):313-332.
[2] 高建民,朱晓梅.转轴上裂纹开闭模型的研究[J].应用力学学报,1992,9(1):108-112.
[3] PAPADOPOULOS C A,DIMAROGONAS A D.Coupled longitudinal and bending vibrations of a rotating shaft with an open crack[J].Journal of Sound and Vibration,1987,117(1):81-93.
[4] 曾复,吴昭同.含横向裂纹简单转子刚度的计算[J].机械科学与技术,1999,18(5):745-747.
[5] 林言丽.斜裂纹转子动力学特性的研究[D].北京:清华大学,2008:20-25.
[6] DARPE A K.Dynamics of a Jeffcott rotor with slant crack[J].Journal of Sound and Vibration,2007,303(1):1-28.
[7] DARPE A K,GUPTA K,CHAWALA A.Coupled bending, longitudinal and torsional vibrations of a crack rotor[J].Journal of Sound and Vibration,2004,269(1/2):33-60.
[8] 何为,任兴民,杨永锋.横向裂纹轴耦合刚度分析[J].振动与冲击,2007,26(12):44-48.
[9] SEKHAR A S.Crack identification in a rotor system: A model-based approach[J].Journal of Sound and Vibration,2004,270(4):887-902.
[10] 王宗勇,林伟,闻邦椿,等.开闭裂纹转轴刚度的解析研究[J].振动与冲击,2010,29(9):69-72.

备注/Memo

备注/Memo:
收稿日期: 2015-07-10
通信作者: 李志农(1966-),男,教授,博士,主要从事智能检测方面的研究.E-mail:lizhinong@tsinghua.org.cn.
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(SKLMT-KFKT-201514)
更新日期/Last Update: 2016-01-20