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| A study on unified prediction models and influence laws of structural parameters for convoluted air spring |
| CHEN Junjie1,2, YIN Zhihong2,3,GUO Konghui3, ZHANG Lei4 |
1.School of Mechanical and Electrical Engineering，Jiangxi University of Science and Technology，Ganzhou 341000，China;
2. School of Mechanical and Automotive Engineering，South China University of Technology，Guangzhou 510641，China;
3. State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130025，China;
4. Product Development Center，Jiangxi Isuzu Motors Co.，Ltd.，Nanchang 330100，China |
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Abstract Structural parameters of convoluted air spring (CAS) are key factors on affecting its mechanical properties. Solving the problem of structural parameters identification is the key way to calculate the load capacity and stiffness characteristics of CAS. Taken the arc length of single convolution and effective flange radius of bead plate as the key design parameters, unified prediction models of structural parameters of CAS based on the key design parameters are established by combining geometrical analysis approach with mechanical analysis method. The test device of structural parameters is built, and the validity of unified prediction models of structural parameters are verified by experiments. It is revealed that the effective volume and its change rate, effective area of CAS are positive correlation with key design parameters, but the change rate of effective area is positive correlation with the arc length of single convolution and negative correlation with effective flange radius, which provides a guide for lower stiffness design of CAS. It is further pointed out that the effective flange radius has more significant influence on structural parameters of CAS than arc length of single convolution. Increasing the effective flange radius can significantly increase the effective area and significantly improve load capacity of CAS, which also provides a design guide for improving the load capacity of CAS under the premise of keeping the working pressure unchanged. The research results lay a foundation for the accurate calculation of structural parameters and mechanical properties of CAS in the design stage, and also provide theoretical support for the design and optimization of structural parameters of CAS.
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Received: 29 July 2020
Published: 28 December 2021
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