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橡胶的黏弹性和阻尼对空气弹簧垂向动刚度的影响。

Influence of rubber's viscoelasticity and damping on vertical dynamic stiffness of air spring.

机构信息

School of Mechanical Electrical Engineering, Wenzhou University, Wenzhou, 325035, China.

Zhe Jiang Sensen Auto Parts LTD, Wenzhou, 325204, China.

出版信息

Sci Rep. 2023 Jun 19;13(1):9886. doi: 10.1038/s41598-023-36904-9.

DOI:10.1038/s41598-023-36904-9
PMID:37337015
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10279713/
Abstract

Using the diaphragm-type air spring as the research object. The ratio of the vertical stiffness change caused by compressed air to the total vertical stiffness change was calculated, and it was determined that the nonlinearity of air spring vertical stiffness was mainly caused by the deformation stiffness of the rubber airbag. The variation law of vertical dynamic stiffness of air spring was predicted by theory: due to the material's viscoelasticity, the vertical dynamic stiffness rises as the excitation frequency rises, and the vertical dynamic stiffness decreases with the increase of excitation amplitude due to the damping of the material. An air spring finite element analysis (FEA) and experiment were conducted. The results show that the vertical dynamic stiffness obtained through simulation and experiment is consistent with the theoretical prediction, when various factors such as material nonlinearity, element coupling, and stiffness value sensitivity were considered. This proves that the predicted vertical dynamic stiffness variation law is reliable. The vertical dynamic stiffness obtained from both simulation and experiment showed a strong correlation in numerical values, which verified the accuracy of the FEA model of air spring established in this paper.

摘要

以膜式空气弹簧为研究对象。计算了压缩空气引起的垂直刚度变化与总垂直刚度变化的比值，确定空气弹簧垂直刚度的非线性主要是由橡胶气囊的变形刚度引起的。通过理论预测了空气弹簧垂直动刚度的变化规律：由于材料的粘弹性，垂直动刚度随激励频率的升高而升高，并且由于材料的阻尼，垂直动刚度随激励幅值的增大而减小。对空气弹簧进行了有限元分析（FEA）和实验。结果表明，当考虑材料非线性、单元耦合和刚度值灵敏度等各种因素时，通过模拟和实验获得的垂直动刚度与理论预测一致。这证明了所预测的垂直动刚度变化规律是可靠的。模拟和实验得到的垂直动刚度在数值上具有很强的相关性，验证了本文建立的空气弹簧有限元模型的准确性。

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