Road load test method and system

Abstract

The invention discloses a road load test method and system. The method comprises the steps of: with a sample vehicle running on roads on a test site, extracting an original road load spectrum; filtering the original road load spectrum, and obtaining the road load spectrum which has been filtered; based on a multi-body dynamics automobile model and in accordance with road load spectrum which has been filtered, obtaining the road load spectrum for carrying out the simulation through virtual iteration technology; through load decomposition, obtaining load data at each preset connection point of the vehicle body and a chassis; and based on the load data, calculating a first fatigue endurance value of each preset connection point. The method can obtain the actual original road load spectrum on different test sites, and based on the actual original road load spectrum, can calculate the fatigue life value, and can further predict a more accurate fatigue life of the vehicle, which can effectively increase the fatigue endurance of the vehicle body and provide the effective basis for the optimization and improvement of a vehicle structure in vehicle design.

Description

technical field [0001] The invention relates to manufacturing technology, in particular to a road load testing method and system. Background technique [0002] With the continuous progress of modern automobile research and development and manufacturing technology, people have higher and higher requirements for the fatigue durability of automobile structures. Fatigue durability is usually improved by evaluating the fatigue life of the vehicle body structure during the vehicle design phase. [0003] The existing method for evaluating the fatigue life of automobile body structure is to first use the empirical load of extreme working conditions as the vehicle load data, and then establish a virtual model of the whole vehicle to carry out fatigue life simulation analysis on the load data, and find the points with lower fatigue life on the car body And improve in the car design, in order to improve fatigue durability. Among them, the extreme working condition experience load ref...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a road load testing method and system, which is used to solve the problem that the empirical load of the existing extreme working conditions is used as the vehicle load data, and the fatigue life of the vehicle body cannot be accurately predicted, resulting in the inability to effectively improve the fatigue durability of the vehicle body

Images