Model processing method for two-dimensional finite element analysis of cylindrical part and storage medium

Abstract

The invention discloses a model processing method for two-dimensional finite element analysis of a cylindrical part and a storage medium. The two-dimensional finite element analysis precision of the cylindrical part can be improved. According to the model processing method for the two-dimensional finite element analysis of the cylindrical part, multiple pairs of polygons located in the plane where the cross section of a cylinder is located are used as equivalent sections of the circular section of the cylindrical part, and the multiple pairs of polygons are in axial symmetry with respect to a first axis passing through the circle center of the circular section; the plurality of polygons are arranged adjacent to each other in a direction away from the first axis from the first axis on each side of the first axis, and the intersecting lines between the adjacent polygons are shorter further away from the first axis. The size of each polygon is determined so as to satisfy the condition that the total area of the plurality of pairs of polygons is equal to the total area of the circular cross-section and the condition that the total moment of inertia of the plurality of pairs of polygons is equal to the moment of inertia of the circular cross-section.

Description

technical field [0001] The present invention relates to a model processing method and a storage medium for two-dimensional finite element analysis of cylindrical parts. Background technique [0002] In mechanical equipment in different fields such as aerospace, ground gas turbines, construction machinery, etc., different parts are often connected by bolt structures. Bolts play the role of transmitting loads and maintaining connections. Once failure, it will affect the stability of mechanical equipment connections. This can lead to catastrophic accidents such as increased vibration and parts flying off. Therefore, in the stage of structural finite element analysis in mechanical design, it is necessary to carry out refined modeling of bolts to improve analysis accuracy and support part design. The screw is a cylindrical part with a certain length on the bolt and screw and a spiral groove on the outer surface. It cooperates with the nut to generate a preload load and bears loa...

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Problems solved by technology

For example, if Figure 4 As shown, if the radius of the screw is r, then the existing mass equivalent method sets the equivalent parts of the screw as Figure 5 The cylinder shown has a rectangular section with thickness t=πr / 2 and height h=2r. Therefore, the section moment of inertia of the equivalent component I=(1 / 3)πr 4 (representing the bending stiffness), and the theoretical moment of inertia of the screw I=(1 / 4)πr 4 Inconsistency, i.e. there is a difference in bending stiffness, which in turn affects the analysis results

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