Method for improving geometric analysis contact search efficiency

Abstract

The invention relates to a method for improving geometric analysis contact search efficiency and stability of clearance revolute pair dynamic characteristics and the like. The method comprises the following steps: as for a clearance revolute pair finite element model, performing NURBS curve modeling and using a parameterization method on the contact boundary; setting a numerical integration pointat the bearing contact boundary; for any integral point on the bearing contact boundary, calculating the distance between the integral point and each end point on the rotating shaft contact boundary,comparing the sum of the distances between the two end points of each curve section and the integral points, locating the arc section with the minimum distance sum is the contact arc section where theprojection point so that contact search amount can be reduced to one fourth of that of a conventional algorithm. Parameter values corresponding to two end points of an arc section where a projectionpoint is located and a shorter distance from an integral point are selected as initial values of nonlinear iteration, so that the stability of iterative search is improved.

Description

Technical field [0001] The present invention relates to computer-aided engineering analysis, and more specifically, to a method for improving the contact search efficiency and stability during the dynamic finite element analysis of the clearance rotation pair. The method can be used for time-advancing engineering simulation to assist Users improve the efficiency and stability of analysis when improving the design of engineering products (for example, automobiles, airplanes, machine tools, and robots). Background technique [0002] Due to factors such as design, manufacturing, processing, wear, etc., it is inevitable that there will be gaps in rotating pairs in mechanical systems (for example, automobiles, airplanes, machine tools, and robots). The clearance causes frequent contact and collision between the bearing and the rotating shaft during the relative movement, and introduces phenomena such as vibration, noise, and wear in the system, which seriously affects the accuracy of ...

AI Technical Summary

Problems solved by technology

If the traditional finite element method is used, for each integration point on the contact boundary of the bearing, all the elements on the boundary of the rotating shaft are searched once, the workload of nonlinear iteration is large, the calculation efficiency is not high, and there is a stability problem of iteration, it is possible As a result, the contact area cannot be found correctly, which affects subsequent calculations

Images