Studies of influence of raihead profiles on dynamics of freight car running on curved track
Journal Title: Технічна механіка, Техническая механика, Technical Mechanics - Year 2015, Vol 3, Issue 3
Abstract
The present paper deals with advantages of asymmetric railhead profiles on the curved track. The research under consideration has been aimed at analyzing the influence of introducing changes to railhead profiles of the inner and outer rail on wheel sets rolling and dynamic parameters of the freight car running on the curved track. For this purpose we used a mathematic model of the freight car motion, which took into consideration geo-metrical parameters of contacting surfaces, with provision for setting various profiles of wheels and rails. The possibility of changing the wheel rolling radius due to shifting the point of the wheel-rail contact is viewed as a mechanism of the influence of the railhead profile on entering the curved track. New asymmetric railhead pro-files have been used ensuring the contact of wheels with the outer rail along the maximum rolling radius and with the inner rail along the minimum admissible rolling radius, which allows a better entering the curve. According to the simulation results the functional dependencies of dynamic parameters of the freight car on the speed of its movement along the curved track with two versions of railhead profiles have been derived. The calculations demonstrated that during the freight car movement along the curved track with asymmetric railhead profiles the improvement of the dynamic parameters is registered. The use of asymmetric profiles would allow an increase in differences of the wheel rolling radii while entering the curve, thus positively influencing both wheel/rail in-teractions and dynamic performance of a freight car.
Authors and Affiliations
N. Bezrukavyi
Keywords
Related Articles
- EP ID EP355846
- DOI -
- Views 63
- Downloads 0
Numerical simulation of axially symmetric flow around bodies of simple configurations using hierarchy grids
A variation of the statistic Monte-Carlo method for the stationary statement, namely test particles method (TPM), is considered. The study objective is to develop the TPM using computations on hierarchy grids. The replac...
Numerical studies of paralleling test particles method using statistic independent tests
The test particles method (TPM) as a version of the Monte-Carlo statistic method for the stationary state-ment is considered. Nonparalleling a sequential algorithm of the TPM as large independent subproblems (LISs) has b...
Development and full-scale tests of unified sound suppressors for small arms
The paper deals with information about the authors’ works on the improvement of the firearm sound sup-pressor design and optimization of the performance. Designs of unified sound suppressors developed by the authors a...
Model Problems for Class of Systems for Mutual Positioning Spacecraft and Payload
The class of systems for mutual positioning a spacecraft and payload is considered. It can include the exist-ing systems for transportation of a payload relative to an orbital spacecraft using an anthropomorphic manipula...
Model of motion of small radial space tetheredsystem by the action of aerodynamic moment
The possibility of using the electrodynamic space tethered systems (EDSTS) for deorbiting the space debris is currently being studied extensively. However, a preliminary analysis demonstrated the instability of a radial...