A Dynamic Equivalent Modeling Method of Ball Bearing Based on Adams

Abstract

The invention discloses a ball bearing dynamics equivalent modeling method based on ADAMS, comprising the following steps: 1) establishing a three-dimensional stereogram of the ball bearing, and importing the three-dimensional model into ADAMS; Connecting rods, add a slip pair between each ball center of mass and the connecting rod, and then use Boolean operations to synthesize all the connecting rods into a connecting rod member to replace the cage of the original model, modify the quality attribute parameters of the connecting rod member and set it to Zero; 3) A ball with a radius smaller than the ball is built into each ball of the ball bearing, and a ball joint is added to constrain the ball and the built-in ball; the quality attribute parameter of the built-in ball is changed to zero. Under the premise of ensuring correct modeling and not affecting the dynamic simulation results, the present invention accurately simulates the complex rotation of the ball during the actual operation of the bearing; greatly simplifies the modeling steps, greatly reduces the simulation operation time, and improves the simulation reliability and Simulation efficiency.

Description

technical field [0001] The invention relates to a dynamic modeling method of a ball bearing, in particular to an ADAMS-based dynamic equivalent modeling method of a ball bearing. technical background [0002] The bearing mechanics model has gone through three stages of development: static analysis model, quasi-static analysis model and dynamic analysis model. In the early days, the static analysis model was only established based on the ideal motion state and simple motion relationship, so it was difficult to accurately predict and describe the motion state of the bearing. The quasi-static analysis model is relatively complete, and can effectively predict motion parameters such as rolling element speed, bearing fatigue life, bearing deformation and stiffness, and can basically meet engineering needs, but it cannot analyze the transient instability of bearings, nor can it fully describe the dynamic performance of bearings . The dynamic analysis model can not only effectivel...

AI Technical Summary

Problems solved by technology

However, in the modeling process based on ADAMS, the mechanical characteristics of the internal components of the ball bearing during operation are very complicated: the ball inside the bearing has both revolution around the bearing axis and rotation around its center of mass axis; The contact between the rolling elements and the inner and outer rings and the cage is a multi-body contact problem. In addition, the contact between the inner ring of the bearing and the shaft, and the contact between the outer ring of the bearing and the bearing housing will affect the internal parts of the bearing.

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