Analysis of Influence of Air Damping Mesh Elastic Pad on Vehicle-Track Dynamic Performance
The static stiffness and damping coefficient of the air damping mesh pad can be flexibly adjusted by adjusting the key structural parameters.Finite element calculations show that the static stiffness of the air damping mesh pad in-creases with the increase of throttle hole size or air chamber volume ratio,while the damping coefficient decreases ac-cordingly.Compared with the traditional pad,the air damping mesh pad has lower stiffness and greater damping.A dy-namic model of vehicle-track system was established with its accuracy being verified by field tests.Dynamic calculations show that the corresponding vertical vibration acceleration of rail,track bed,and car body,as well as vertical wheel-rail force,and derailment coefficient will all decrease with the decrease of throttle hole size or air chamber volume ratio,while the vertical rail displacement will increase.Additionally,the air damping mesh pad,with better vibration reduction performance compared with the groove pad,can effectively reduce the vertical vibration acceleration,wheel and rail ver-tical force,and derailment coefficient caused by train passing,which is conducive to ensuring the safe and stable train operation and plays a certain role in protecting the under-rail structure.
elastic padair dampingstiffness and dampingparameter analysisdynamic response
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