GB/T 22038-2018 in English
VALIDMethod of automobile tyre static contact pressure distribution
- Issued on:2018-12-28
- Implemented on:2019-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
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《GB/T 22038-2018汽车轮胎静态接地压力分布试验方法》由TC19（全国轮胎轮辋标准化技术委员会）归口，TC19SC1（全国轮胎轮辋标准化技术委员会汽车工农业机械轮胎轮辋分会）执行，主管部门为中国石油和化学工业联合会。
Introduction
GB/T22038—2018 Standard Overview
GB/T22038—2018 "Test Method for Static Ground Pressure Distribution of Automobile Tires" is an important technical standard in the automobile industry, which is mainly used to guide the ground pressure distribution test of automobile tires under static conditions. This article will provide you with a comprehensive interpretation from four aspects: the background of standard revision, key points of technical updates, equipment requirements and implementation suggestions.
Standard Formulation Background and Technology Evolution Analysis
The GB/T22038 standard was originally issued in 2008, mainly specifying the test method for static ground pressure distribution of automobile tires. With the development of tire technology and the improvement of technical requirements, some clauses of the original standard can no longer meet existing needs.
The 2018 version of the standard has made important updates in the following aspects:
- The definition of the term "radial force" has been modified, and the tire force coordinate system has been introduced.
- The test step requirements for the light absorption method have been added.
- The test equipment accuracy requirements have been optimized, including the pressure gauge accuracy and the accuracy control of the displacement measurement system.
- The calculation formula for the saturation of the contact print pattern has been added.
Comparative Analysis of Standard Frameworks
| Technical Requirements | GB/T22038—2008 | GB/T22038—2018 | Update Notes |
|---|---|---|---|
| Definition of Radial Force | Force Coordinate System Not Clearly Defined | Introduction of tire force coordinate system (Figure 1) | Optimization of technical details |
| English corresponding word for contact surface | - | Modified to "contactpatch" | International standard unification |
| Equipment accuracy requirements | ±1° | ±0.05° | Improved accuracy |
Practical application case analysis
Taking a well-known tire company as an example, the accuracy of the ground pressure distribution test was significantly improved by combining the light absorption method and the sensitive film method. The specific steps are as follows:
- Prepare test equipment: loading device, positioning device, force/displacement measurement system
- Install the tire and adjust it to the standard air pressure
- Apply radial load and maintain a speed of (50±2.5) mm/min until the target load is reached
- Record key parameters such as footprint area, contact length and width
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