Road load testing method and system

A technology of load testing and road load spectrum, applied in the field of manufacturing process, can solve the problems such as the inability to effectively improve the fatigue durability of the vehicle body and the inability to accurately predict the fatigue life of the vehicle body, and achieve the effect of improving the fatigue durability and accurate prediction of the vehicle body

Active Publication Date: 2018-03-13
BAIC MOTOR CORP LTD
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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

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  • Road load testing method and system
  • Road load testing method and system

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. figure 1 For the flow chart of the first embodiment of the road load testing method of the present invention, please refer to figure 1 , the invention provides a road load testing method, comprising:

[0024] Step 101, the prototype vehicle moves on the road of the proving ground, and extracts the original road load spectrum through the sensors arranged at the preset positions of the body and chassis and the sextant fixed on the rim adapter;

[0025] Specifically, the original road load spectrum extracted by the sextant includes the force and torque of the sample car in the X, Y, and Z directions on roads with different strengths, where the X direction is the direction parallel to the longitudinal axis of the vehicle body, and the Y direction is the direction parallel to the longitudinal axis of the vehicle body. A direction is a direction parallel to t...

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Abstract

The present invention provides a road load testing method and system, comprising: a prototype vehicle moves on a test field road to extract an original road load spectrum; filtering the original road load spectrum to obtain a filtered road load spectrum; Based on the multi-body dynamics model of the vehicle, according to the filtered road load spectrum, the road load data for simulation is obtained through virtual iteration technology; through load decomposition, each preset connection point on the body and chassis is obtained The load data; according to the above load data, calculate the first fatigue life value of each preset connection point. This method can obtain the real original road load spectrum on different proving ground roads, and calculate the fatigue life value according to the real original road load spectrum, predict the fatigue life of the car more accurately, and effectively improve the fatigue durability of the car body. It provides an effective basis for the optimization and improvement of the vehicle body structure.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/007
Inventor 张立玲郭九大刘明卓黄黎
Owner BAIC MOTOR CORP LTD
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