Theoretical study into efficiency of the improved longitudinal profile of frogs at railroad switches
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 4, Issue 1
Abstract
<p>We have developed a comprehensive method to prolong the time of operation of frogs at railroad switches, based on the consideration of a longitudinal profile of the frog, the magnitude of dynamic forces and normal stresses.</p><p>We have improved a longitudinal profile of the frog, brand 1/11, project 1740, by the method of surfacing under field operation conditions. The slopes of a trajectory after the passage of an average statistical wheel over the proposed profile amount to 3.7 ‰ instead of 10 ‰ for a standard profile of the frog.</p><p>It was established that increasing a load on the frog to 60 % at the expense of a deflection under the frog beam leads to the accelerated disarrangement of the frog, as a result of fatigue defects at the rolling surface, while the cost of frog operation in this case increases by five times.</p><p>We modeled a dynamic interaction between the rolling stock and a standard, as well as the proposed, longitudinal profiles of frogs. Calculation of dynamic processes of the nonlinear interaction between the rolling stock and a standard profile of the frog and the profile restored by surfacing, showed that the magnitude of forces for the proposed frog at the motion speed of 150 km/h is 50 % lower compared with a standard longitudinal profile. At linear simulation of dynamic additions of forces, the magnitude of forces decreases for the proposed profile to 30 %.</p><p>We employed a graphical method to calculate the magnitudes of axial inertia moments and the moments of resistance in the characteristic cross sections of the frog. The estimation of the stressed-strained state of the frog was performed using equations of five moments for a continuous beam on elastic point supports. It was established that stresses at the static calculation of the frog are low and are much less than the maximum permissible magnitude of stresses for a given grade of steel. Therefore, we can argue that the frog works under a load at the expense of existing reserve of strength.</p>
Authors and Affiliations
Vitalii Kovalchuk, Mykola Sysyn, Julia Sobolevska, Olga Nabochenko, Bogdan Parneta, Andriy Pentsak
Keywords
Related Articles
- EP ID EP528047
- DOI 10.15587/1729-4061.2018.139502
- Views 66
- Downloads 0
Application of intelligent processing of data flows under conditions of river navigation
<p>Implementation of a context-oriented approach for intelligent processing of navigation data flows in operation of water vehicles was considered. The initial sample of processing data flows in the conditions of the cur...
The innvestigation of the process streams integration in the multieffect evaporation plant for the concentration of sorghum syrup
<p>The study on the integration of heat streams of the evaporation station for sorghum syrup concentrating is presented. The relevance of the research is is why the research, aimed at reducing the consumption of external...
The synthesis of control algorithm over a technical condition of the hydrogen generators based on hydroreactive compositions
<p>We have synthesized a control algorithm over technical condition of the hydrogen generators, which includes the following: forming initial data, determining the values for a phase-frequency characteristic of the gener...
Studying the loss of mass by cauliflower depending on agrobiological factors, varietal features, and package technique
<p>The aim of this study was to scientifically substantiate influence of weather conditions during vegetation season of cauliflower, the content of some components of the chemical composition, physical properties, as wel...
The model to optimize deliveries of perishable food products in supply chains
<p>The probabilistic-statistical analytical model of optimizing the supply of perishable food products (PFPs) has been improved. The demand for PFPs is effectively satisfied by introducing into supply chain systems a pos...