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Numerical Simulation of Contact Characteristics of Ball Bearing Based on Thermomechanical Coupling Model

Author: RongQi
Tutor: LinTengZuo
School: Chongqing University
Course: Mechanical Design and Theory
Keywords: Ball bearings Heat coupling Thermo-mechanical coupling Dynamic contact Finite Element Method
CLC: TH133.33
Type: Master's thesis
Year: 2008
Downloads: 291
Quote: 2
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Abstract

Bearing with low frictional torque, power loss, easy maintenance, long life and other characteristics, it is extremely important basic pieces of machinery. With the rapid development of industrial technology, the rising demand for rolling bearing performance. Rolling flux coupled thermo-mechanical coupling and dynamic analysis of the research is still in its infancy, is the focus of current research. Thesis topics from the National Natural Science Foundation of China. Combining the theory of fluid mechanics, heat transfer, contact mechanics, structural dynamics, system for high-speed rolling bearings, bearing multibody static contact, the contact heat transfer, dynamic contact characteristics were studied. The main research work are as follows: ① discussed rolling ball bearings contact analysis model different forms of meshing calculations; through the scroll ball bearings multibody static contact finite element analysis, radial load displacement field stress and strain fields. (2) model for a single rolling element and raceway contact application APDL prepared raceway curvature to optimize the design of the command stream file. Meet the strength of the premise, the first-order optimization method rolling ball bearing raceway curvature optimized design, its elastic deformation under load has been reduced. ③ establish the finite element model of a rolling ball bearing cavity lubricating oil heat coupled analysis of the contours of the temperature field and velocity field of the fluid. The thermal boundary conditions, boundary conditions combined with structural mechanics, thermo-mechanical coupling model the contact characteristics numerical simulation of rolling bearings, the contact stress between the rolling element ferrule, deformation and bearing temperature field. Compare with the analysis of the results when the temperature is not taken into account, bearing friction heat rolling ball bearing deformation and contact stress. ④ comprehensive consideration of the impact of bearing radial load and speed, the application of ANSYS / LS-DYNA software to establish a rolling ball bearings multi-body dynamic contact finite element model; explicit dynamic finite element method is applied to the inner ring different speed rolling ball The stress distribution of the dynamic response and rolling element bearing dynamic contact analysis, come to a rolling ball bearings during operation. ⑤ Application Java and ANSYS / APDL language to develop a set of parametric modeling, meshing, boundary conditions, graphical display in one of the rolling ball bearings modeling and analysis procedures. Can easily and quickly build parameterized finite element model, ANSYS finite element analysis software to aggregate the rolling ball bearings static contact analysis, thermo-mechanical coupling analysis and dynamic contact analysis, reasonable calculations.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Moving parts > Bearing > Rolling
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