Study on longitudinal force simulation of heavy-haul train. Issue 4 (3rd April 2017)

• Record Type: Journal Article
• Authors: Chang, Chongyi; Guo, Gang; Wang, Junbiao; Ma, Yingming
• Is Part Of: Vehicle system dynamics. Volume 55:Issue 4(2017:Apr.)
• Page Start: 571
• Page End: 582
• Publication Date: 2017-04-03
• Subjects: Non-linear oscillation -- Newmark-β method -- equilibrium iteration method -- draft gear -- hysteretic characteristic; Motor vehicles -- Dynamics -- Periodicals; Electronic journals; 629.231
• DOI: 10.1080/00423114.2016.1269183
• Languages: English
• ISSNs: 0042-3114

Abstract

ABSTRACT: The longitudinal dynamics model of heavy-haul trains and air brake model used in the longitudinal train dynamics (LTDs) are established. The dry friction damping hysteretic characteristic of steel friction draft gears is simulated by the equation which describes the suspension forces in truck leaf springs. The model of draft gears introduces dynamic loading force, viscous friction of steel friction and the damping force. Consequently, the numerical model of the draft gears is brought forward. The equation of LTDs is strongly non-linear. In order to solve the response of the strongly non-linear system, the high-precision and equilibrium iteration method based on the Newmark- β method is presented and numerical analysis is made. Longitudinal dynamic forces of the 20, 000 tonnes heavy-haul train are tested, and models and solution method provided are verified by the test results.