The Method of Improving the Accuracy of Finite Element Analysis of Transmission Housing

Abstract

The invention relates to a method for improving the accuracy of finite element analysis of transmission housings. The method includes establishing an assembly finite element model composed of main components such as clutch housings, transmission housings, upper covers, and gears, and applying gears to the meshing nodes of the gears. The meshing force, which fixes the clutch housing bolt holes connected to the flywheel housing, imposes a constraint on the rotational freedom of the gear shaft between all gears and the corresponding support bearings on both sides, and completely interrupts the transmission of torque from the gear shaft to the housing bearing holes. path. In the present invention, the freedom of rotation of the gear shaft is constrained between all the gears and the corresponding supporting bearings on both sides, which avoids the relative rotation or tendency of relative rotation between the bearing and the bearing hole, and solves the problem that the stress in the bearing hole of the shell is too large, so that The finite element simulation of the transmission casing is more realistic, which effectively improves the accuracy of the finite element analysis of the casing, thereby achieving the purpose of improving product design accuracy, reducing product test frequency, and saving product development costs.

Description

technical field [0001] The invention relates to a method for improving the precision of finite element analysis of auto parts, in particular to a method for improving the precision of finite element analysis of a transmission housing. Background technique [0002] As an important basic component, the transmission housing should have sufficient strength to resist the loads such as the gear meshing force caused by the strong torque of the engine and the inertia force of the transmission caused by uneven road surfaces, so as to support the gear shaft and protect the gear transmission mechanism to meet the requirements of the entire vehicle. The purpose of different torque and speed requirements of the transmission. [0003] At present, the finite element method is widely used in the strength checking method of the transmission case. It first converts the gear shaft torque into the gear meshing force (including radial force, axial force, and circumferential force) according to t...

AI Technical Summary

Problems solved by technology

During this process, since the gear shaft is an elastic body, the gear shaft will undergo torsional deformation. When the torsional deformation passes through the bearing, the finite element model of the bearing and the finite element model of the bearing hole will rotate relative to each other, or have a tendency to rotate relative to each other. This causes misalignment and extrusion between multiple smaller planes in the finite element mesh model of bearings and bearing holes that are in contact with each other, thus consuming part of the torque

The dislocation and extrusion of the finite element model of the bearing and the bearing hole will cause the expansion of the bearing hole in the radial direction of the shell, resulting in the deformation of the bearing hole being inconsistent with the actual situation, and the structural stress is too large, which will eventually lead to a decrease in the simulation accuracy of the finite element analysis of the shell The problem

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