Hunting stability analysis of a railway vehicle system using a novel non-linear creep model

• DOI: 10.1177/0954409712445540
• Publication Date: 2012-04-28T01:59:22Z
• Authors: Yung-Chang Cheng
• Keywords: Constant (computer programming)

A non-linear creep model that considers non-constant coefficients vary as a function of vehicle speed is derived using Hertz contact theory, Kalker’s linear theory and heuristic model. The proposed created by modifying the adding moment semi-axis lengths in non-linearity saturation constant. In this paper, modeled system with 28 degrees freedom, taking into consideration lateral displacement, vertical roll angle yaw each wheelset, truck frames car body. To analyze respective effects major parameters on dynamics, degree-of-freedom (DOF) reduced to 25-DOF model, excluding designated subsets parameters. accuracy present analysis verified comparing six-DOF current numerical results literature. suspension critical hunting speeds evaluated currently traditional are illustrated. most cases, obtained show new greater than Additionally, higher