437 Theoretical Analysis of the Vibration Characteristics of an Air Spring with Damping Effect by a Circular Tube

Abstract

This paper proposes a simple but accurate method for calculating the vibration properties of an air spring employing a circular tube to produce a damping force ， Air springs are very colnmon in rail ， automotive ， and vibration isolation applicatiQns ， because they have many advantages over metal springs ， Air spring dealt with this study consists of two tanks and a circular tube which connect them ． By using the circular tube ， the reservoir tank becomes more flexible ， and the apphcation range of an air spring extends ． However， the vibration prediction is dif 且cult ， because the fluid flow in circular tube is very complex ． In addition ， it has two resonance peaks though mass is one ． To soive these problems ， we propose the anaiytical method and theoretlcal equations that predict vibration properties of an air spring accurately ， To validate the utility of theoretical equations ， the theoretical values are compared wlth experimental values