The equivalent conicity is the key indicators in the vehicles and multi-body dynamics simulation, and also in the vehicle's performance evaluation or acceptance testing. But it does not take into account the nonlinear contact influence, different reduction algorithms cause that technological exchanges and the vehicle's performance evaluation results are inconsistent and it is necessary to improve and simplify the description. Based on the overview of the parameters of the equivalent conicity, This article presents the contrast and comparative analysis of the two calculations of quasi-linear function of KLINGEL and the linear regression of the rolling radii difference function, also shows the influence of the contact nonlinearities on the wheel/rail contact geometry with the calculation of three CRH wheel/rail pairs(XP55,S1002CN and LMA) used the two methods, and also recommended that a unified algorithm should be adopted in order to lay a good foundation for engineering practice and theory research.
Implicit gas-kinetic unified algorithm based on multi-block docking grid for multi-body reentry flows covering all flow regimes
