Vehicle bench test load spectrum analysis method based on virtual test field

Abstract

The invention discloses a vehicle bench test load spectrum analysis method based on a virtual test field. The method comprises the following steps: establishing a digital test field durable pavement model; establishing a digital tire model; establishing a vehicle multi-body dynamic model, and performing calibration; simulating a virtual test field, and extracting a virtual load signal; preprocessing and counting the dynamic load; and carrying out test bed load spectrum conversion based on amplitude cumulative frequency. According to the method, dynamic load data of key parts such as a vehicle body and a chassis suspension can be obtained through virtual test field simulation in the early stage of vehicle development, the dynamic load is preprocessed, then compression and pseudo damage evaluation are performed on the load, and finally, a multi-stage constant-amplitude load spectrum is equivalently converted, so the standard load spectrum for the fatigue durability test of the rack test bed is manufactured, full verification of fatigue durability analysis of the vehicle rack is ensured, and the product forming quality is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle bench durability tests, in particular to a method for analyzing the load spectrum of a vehicle bench test based on a virtual test field. Background technique [0002] In the process of automobile development, in order to check the strength or service life of automobile structural parts, road tests and indoor bench tests have become important links in the structural durability design of key parts such as chassis and body. Due to the long cycle and high cost of real vehicle verification, OEMs generally require parts factories to complete bench tests, and some powerful OEMs will provide road maps to parts factories to complete bench tests. The traditional method is to carry out the road spectrum collection test on the real vehicle proving ground after the assembly of the first development vehicle is completed, obtain the six-component force of the wheel center, acceleration and other data as the inpu...

AI Technical Summary

Problems solved by technology

This method must assemble a prototype vehicle and conduct a road spectrum collection test on a real vehicle proving ground. The cycle is long and the cost is high. However, this method is easily limited by the site and climate environment, and leads to a lag in the durable development process, which is inconvenient for the vehicle body. and chassis components structural adjustment and rapid optimization

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