Investigation of Dynamic Processes of Rolling Stock–Track Interaction: Experimental Realization

Abstract

The dynamic process of the railway track–rolling stock interaction is characterized by time-dependent dynamics that are determined by both the varying characteristics of the interaction objects and the varying climatic conditions. This study investigated the effect of different groups of influence on the dynamic process, with a view towards the reduction of the cases of randomness during the registration of the process in experiments and an expansion of the understanding of the processes happening during the assessment of the registered data. The static nature of the rolling stock has been demonstrated to be not uniform and to influence the scattering of dynamic values under the variation of vertical and horizontal forces due to the characteristics of a rolling stock. The position of the rolling stock truck relative to the track axis during the movement of the rolling stock has been shown to enhance static non-uniformity. The results of the longitudinal force measurements under the three-point and Schlumpf methods have suggested that it is necessary to investigate the process of rail warping under the action of the rolling stock wheels. To enhance the output of the experiments, it is proposed to consider not only the stiffness of the basis of the oscillatory processes that imitate the physical process of oscillation of the system elements by means of the oscillation amplitude, but also the time of response to the oscillation process by using and assessing the triggering time rather than the frequencies of the oscillation processes.

Modeling the interaction of the rolling stock and the track in the emergency braking mode of a passenger train

“…Contact interaction is used in models to simulate the interaction of side bearings, center plate-thrust center-pivot, and coupler-plate and coupler-auto coupler [13]. When describing the contact interaction of bodies, it is assumed that an infinite plane is associated with one of the contacting bodies, and a set of contact points is associated with the second body.…”

“…The purpose of the next stage was to determine the influence of the shape of the unevenness on the behavior of the rolling stock. A series of numerical experiments were carried out for the movement of a single wagon [31]. When assessing the traffic safety of a single passenger car, due to the small effect on transverse vibrations, braking and longitudinal forces are not taken into account.…”

Dynamic Sustainable Processes Simulation to Study Transport Object Efficiency

“…Based on the elasticity theory and propagation of elastic waves, a method has been developed for determining the processes that lead to a change over time in local values of deformations and displacements inside elements [70,81,92,133,134]. The main advantage of the proposed modeling method is the use of the ability of elastic waves to propagate the energy of force actions (impulses) in space and time.…”

An Estimation of the Energy Savings of a Mainline Diesel Locomotive Equipped with an Energy Storage Device

“…Modeling is important in creating modern equipment for vehicles [31,32] and rail transport systems in general [32][33][34]. Mathematical modeling is widely used, in particular, for the study of rolling stock [35][36][37], traction power supply systems [38][39][40], infrastructure objects [41][42][43], traffic safety assessment [44,45], transportation process management [46], etc. The priority is mathematical modeling that does not require the production of physical prototypes of equipment and systems.…”