Car body dynamic intensity analysis method

Abstract

The invention provides a vehicle body dynamic strength analysis method, comprising the following steps: a, simultaneously measure the acceleration information of a solid wheel center and the acceleration and strain information at key points on the vehicle body; b, taking the acceleration information at the solid wheel center as the external load input information of a simulation model, and then simulating the acceleration and strain results of the key points on the vehicle body based on the external load input information; c, comparing the actually measured acceleration and strain information of the key points on the vehicle body with the simulation result; d, adjusting the simulation model based on the comparison result; and e, through the adjusted simulation model, obtaining the stress and strain information of each component of the complete vehicle and carrying out fatigue life analysis on the components.

Description

technical field [0001] The invention relates to an analysis method, in particular to a vehicle body dynamic strength analysis method. Background technique [0002] The structural reliability of automobiles and parts is a matter of great concern to automobile manufacturers and users, and road reliability tests are an important means to investigate the reliability of complete vehicles and parts. In terms of reliability test, three types of tests are generally carried out: actual road test; proving ground test; indoor bench test. The actual road test period is too long, the test field test period is long and the repeatability is poor, and the indoor bench test period is short and repeatable but the equipment is expensive. [0003] The external loads on the vehicle are dynamic loads that change with time, most of which are cyclic random loads, and the dynamic loads will cause dynamic stress on many components of the vehicle, eventually leading to fatigue failure of the componen...

AI Technical Summary

Problems solved by technology

There are two ways to measure the road load of a vehicle: one is to measure the local stress and strain. This method directly arranges the strain gauges at the high stress and strain points of the parts. The measurement results can be directly used for the calculation of fatigue damage, but the results cannot be converted to other parts

The second is to measure the external load of the vehicle. This method generally uses a wheel force sensor to measure the six component forces acting on the wheel axle head as the load of the vehicle on the road, but measuring the six component forces at the wheel axle head is more complicated and costly. high

Images