科研之友
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摘要
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 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 were established by combining a geometrical analysis approach with a mechanical analysis method. The test device of structural parameters was built, and the validity of unified prediction models of structural parameters were verified by experiments. It reveals that the effective volume and its change rate, effective area of CAS have positive correlation with the key design parameters, but the change rate of effective area is positively correlated with the arc length of single convolution and negative correlation with effective flange radius, which provides guidance for lower stiffness design of CAS. It further points out that 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 design guidance for improving the load capacity of CAS under the premise of keeping the working pressure unchanged. The results lay a foundation for 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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单位汽车仿真与控制国家重点实验室; 华南理工大学
