Nonlinear Dynamic Response of High Speed Ball Bearings Due to Surface Waviness and Unbalanced Rotor

2006 ◽  
Vol 7 (2) ◽  
Author(s):  
S. P. Harsha ◽  
C. Nataraj
Keyword(s):  
Dynamic Response ◽  
Nonlinear Dynamic ◽  
High Speed ◽  
Ball Bearings ◽  
Surface Waviness ◽  
Nonlinear Dynamic Response ◽  
Unbalanced Rotor

Study on the Pair’s Characteristics of Web Press’s Fold System in High Speed

2011 ◽  
Vol 311-313 ◽  
pp. 1398-1403
Author(s):  
Ying Cai Yuan ◽  
Yan Li ◽  
Yi Ming Wang
Keyword(s):  
Dynamic Response ◽  
Nonlinear Dynamic ◽  
High Speed ◽  
Dynamic Performance ◽  
Dynamics Model ◽  
Nonlinear Dynamic Response ◽  
Response Characteristics ◽  
Fold System ◽  
Main Factors ◽  
Dynamic Response Characteristics

In high speed, the web press’s fold mechanism appears nonlinear dynamic response characteristics, which seriously affect the fold system’s stability and precision. The clearance and roller’s deformation are the main factors to cause the nonlinear dynamic response. To study the influence of clearance and roller’s deformation, the hypothesis of rigid role and spring combination is put forward. Based on the hypothesis, the dynamics model of fold system with clearance is established by kinematics and dynamics analysis. Through the dynamics model of fold system, the situation of pair clearance and roller’s deformation can be obtained, and the influence to the dynamic performance of fold system can be easily got.

Influence of Lubricant Traction Coefficient on Cage's Nonlinear Dynamic Behavior in High-Speed Cylindrical Roller Bearing

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
Wenhu Zhang ◽  
Sier Deng ◽  
Guoding Chen ◽  
Yongcun Cui
Keyword(s):  
Dynamic Response ◽  
Dynamic Behavior ◽  
Nonlinear Dynamic ◽  
High Speed ◽  
Roller Bearing ◽  
Mass Center ◽  
Nonlinear Dynamic Response ◽  
Traction Coefficient ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller

In this paper, the formulas of elastohydrodynamic traction coefficients of four Chinese aviation lubricating oils, namely, 4109, 4106, 4050, and 4010, were obtained by a great number of elastohydrodynamic traction tests. The nonlinear dynamics differential equations of high-speed cylindrical roller bearing were built on the basis of dynamic theory of rolling bearings and solved by Hilber–Hughes–Taylor (HHT) integer algorithm with variable step. The influence of lubricant traction coefficient on cage's nonlinear dynamic behavior was investigated, and Poincaré map was used to analyze the influence of four types of aviation lubricating oils on the nonlinear dynamic response of cage's mass center. The period of nonlinear dynamic response of cage's mass center was used to assess cage's stability. The results of this paper provide the theoretical basis for selection of aviation lubricating oil.

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