文献类型：期刊文献

英文题名：Dynamics characteristics of rotor with breathing crack using finite element method

作者：Liu, Changli[1]; Xie, Pengru[1]; Zhou, Shaoping[1]; Li, Cheng[2]; Zheng, Jianrong[1]

机构：[1] School of Mechanical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] State Key Lab of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China

年份：2011

卷号：31

期号：2

起止页码：185

外文期刊名：Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis

收录：EI(收录号：20112214022816)

语种：英文

外文关键词：Stress intensity factors - Finite element method - Strain energy - Surface defects - Stiffness matrix - Strain rate

摘要：A finite element model of a Jeffcott rotor with cracks was studied. Based on the approach of strain energy release rate, a stiffness matrix of the rotor with a crack was derived. The breathing behavior of the crack was represented considering the opening and closing of the crack using stress intensity factor. The unbalance responses of the rotor with transverse and slant cracks were analyzed, as well as the actual breathing behavior of the crack in a steady-state rotating cycle. The time of the opening and closing of the slant crack is longer than that of the transverse crack, and the time of the slant crack in fully closed and fully open states is also longer than that of the transverse crack. The surface crack depth increases with 1X and 2X harmonic components of the cracked shaft, but there is a little change of the 3X harmonic component.