用马赫数对高速转向架空气弹簧刚度修正计算的探讨

Inquiry into the Calculation on Correction of High speed Truck Air spring stiffness with Mach Number

以往的转向架空气弹簧刚度计算式未计入行车时的空气动力效应,用其计算高速转向架空气弹簧刚度时须进行马赫数修正。文中阐述了高速列车空气动力效应所引发的背压降对空气弹簧装置的影响,导出了以马赫数表示的背压降计算式及空气弹簧刚度修正式。

The calculation formula for truck air spring stiffness do not count the air dynamic effect during train runnign.When such formula are used to cal- culate air spring stiffness of high speed trucks,they should be corrected with Mach number.In this paper,the effects of back pressure drop induced by the air dynamic effect of high speed trains on the air spring system are described,the calculation for- mula of back pressure drop expressed with Maeh number and correction formula for air spring stiffness are deduced.