Research on Time-varying Stiffness Characteristics of the Rotating Shaft with Transverse and Slant Crack
LIU Changli1;Li Cheng 2;ZHOU Shaoping1; XIA Chunming1
1. School of Mechanical Engineering, Key Lab of Safety Science of Pressurized System, Ministry of Education, 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
Abstract：The dynamic equations of the cracked rotor system were established using finite element method. Based on the approach of strain energy release rate, the stiffness matrix of the crack element was derived. The breathing behavior of the crack was represented by taking into account the opening and closing of the crack using stress intensity factor. The detailed researches were done on the characteristics of the breathing rules of transverse and slant cracks and the time-varying stiffness of the cracked element in a steady rotating period. The increase on the surface crack depth raises the variation of the stiffness of the cracked shaft. The characteristics of stiffness variation of the shaft with transverse or slant crack are not the same. Compared with the transverse crack, the slant crack will lead to more and greater coupled vibration. And the dynamic performance of the rotor will be more complicated.
刘长利;李诚;周邵萍;夏春明. 直斜裂纹转轴的时变刚度特性研究*[J]. , 2011, 30(3): 165-170.
LIU Changli;Li Cheng;ZHOU Shaoping;XIA Chunming. Research on Time-varying Stiffness Characteristics of the Rotating Shaft with Transverse and Slant Crack. , 2011, 30(3): 165-170.
2011, Vol. 30 
