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International Journal of Applied Mechanics and Engineering

The Journal of University of Zielona Góra

Editor-in-Chief: Walicki, Edward

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CiteScore 2016: 0.12

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2353-9003
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The Dynamic Characteristic and Hysteresis Effect of an Air Spring

F. Löcken
  • Corresponding author
  • Helmut-Schmidt-Universität: Institut für Maschinenelemente und Rechnergestützte Produktentwicklung Holstenhofweg 85, 22043 Hamburg, GERMANY
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/ M. Welsch
  • Helmut-Schmidt-Universität: Institut für Maschinenelemente und Rechnergestützte Produktentwicklung Holstenhofweg 85, 22043 Hamburg, GERMANY
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Published Online: 2015-03-11 | DOI: https://doi.org/10.1515/ijame-2015-0009

Abstract

In many applications of vibration technology, especially in chassis, air springs present a common alternative to steel spring concepts. A design-independent and therefore universal approach is presented to describe the dynamic characteristic of such springs. Differential and constitutive equations based on energy balances of the enclosed volume and the mountings are given to describe the nonlinear and dynamic characteristics. Therefore all parameters can be estimated directly from physical and geometrical properties, without parameter fitting. The numerically solved equations fit very well to measurements of a passenger car air spring. In a second step a simplification of this model leads to a pure mechanical equation. While in principle the same parameters are used, just an empirical correction of the effective heat transfer coefficient is needed to handle some simplification on this topic. Finally, a linearization of this equation leads to an analogous mechanical model that can be assembled from two common spring- and one dashpot elements in a specific arrangement. This transfer into ”mechanical language” enables a system description with a simple force-displacement law and a consideration of the nonobvious hysteresis and stiffness increase of an air spring from a mechanical point of view.

Keywords : air springs; dynamic characteristic; transfer thermodynamic to mechanic

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About the article

Received: 2014-05-07

Accepted: 2014-12-09

Published Online: 2015-03-11

Published in Print: 2015-02-01


Citation Information: International Journal of Applied Mechanics and Engineering, ISSN (Online) 1734-4492, DOI: https://doi.org/10.1515/ijame-2015-0009.

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© 2015. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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