A simulation method for checking bolt safety factor

Abstract

A bolt safety factor check simulation method, comprising the following steps: use rigid elements to simulate the bolt holes of two sheet metal parts that need to be connected, and establish a rod element to simulate the screw rod of the bolt; Rod unit number; extract two shear forces and one axial force of each bolt, select the bolt type and grade, and check the tensile strength of the bolt through the corresponding axial force of each bolt; through limited The meta-software simulation calculates the slip limit and slip load, and calculates the anti-slip safety factor; the bolt tensile safety factor is calculated through the extracted bolt axial force and allowable load. The invention realizes the digitization, parameterization and precision of bolt safety check and type selection by checking the safety factor of the bolts.

Description

technical field [0001] The invention relates to a bolt safety factor check method, in particular to a bolt safety factor check simulation method. Background technique [0002] Batteries, electric motors, and engines are major sources of critical components on vehicles. For example, the weight of a general battery pack is more than 200-300kg. When fixing the battery on the frame, R&D workers often focus on the strength of the battery pack bracket and the frame, while ignoring the bolts of the connecting parts on the battery pack bracket. security issues. This will lead to two situations when the bolts on the battery bracket are selected: the bolts are too large or the bolts are not selected enough. If the bolt size is too large, it will cause the frame to expand, but the frame is often a standard hole, not only the bolts are overkill, but also increase the strength risk of the frame caused by the frame expansion; if the bolt size is too small, it is easy to cause the bolt t...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention proposes a bolt safety coefficient check simulation method, which can effectively and more reasonably select the bolt type, realize the digitalization of the bolt type selection, and realize fast simulation calibration of a large number of bolts in advance Nucleation and optimization, fast and accurate, that is, the accurate selection of bolts can be placed in the design stage to avoid the problem of oversized or undersized bolts in the later stage

Images