Influence of viscoelastic mechanical properties of rail pads on wheel and corrugated rail rolling contact at high speeds

In the track facilities over the past decade, the polygon for laying reinforced concrete crossties has significantly expanded for many reasons. The main ones are the shortage of wooden crossties, their high cost and low life. Due to frequent crossovers, the service life of wooden crossties in the curved sections of the track R≤350 m is only 7 years. This is 5 times less than the life of reinforced concrete crossties. In the curves R≤350 m under the action of the rolling stock, an intensive accumulation of residual deformations occurs, which causes a violation of the track geometry in the plan. Simultaneously, the stability of the assembled rails and crossties in the transverse plane decreases. Given the shortcomings of the railway track on wooden crossties, a study is conducted to solve the problems of geometry, and the stability of the track in the transverse horizontal plane. To achieve this, the design of the fastener assembly KПП–5 (SB–3) has been improved, which makes it reliable and adjustable in all respects for 800 1000 million of tons of bruto. In order to ensure the stability of the track, an anchor crosstie structure has been created which can increase the resistance to transverse displacement of the assembled rails and crossties more than 2 times. The developed and justified measures will allow to create a highly efficient construction of a seamless track with reinforced concrete crossties and КПП–5 (SB–3) fastener for curved sections with a radius of 350 ÷ 200 m. When considering these proposals with the possibility of practical use, it becomes possible to introduce a safe and reliable design of continuous welded rail track with КПП–5 fastener assembly in difficult operating conditions

/pdf/investigation-of-the-traffic-safety-and-provision-of-the-1dbzjfegeo.pdf

Investigation of the traffic safety and provision of the performance reliability of the transport infrastructure

In the article the issues of testing the parts of a fastening КПП-5 on reliability are considered and the modem way of fixing the backing anchor in a form at a factory of ferro-concrete sleepers is presented.

/pdf/the-intermediate-rail-fastening-cat-5-in-kazakhstan-4ivmgquasq.pdf

The intermediate rail fastening cat-5 in kazakhstan

The numerical rating of parameters of serviceability of the elastic plug КП-5.2 is carried out in this work. The geometrical characteristics of the plug cross section and rigidity of plugs і are determined, and also the verifying calculations on streangth and endurance are carried out

http://stp.diit.edu.ua/article/download/21023/18539

Estimation of parameters of the elastic terminal of mark kp-5.2

R. Markul: ORCID 0000-0002-7630-8963; V. Kovalchuk: ORCID 0000-0003-4350-1756; Yu. Hnativ: ORCID: 0000-0001-8862-4202, N. Nastechik: ORCID 0000-0002-4178-6092

Y. M. Hnativ

Papers

Investigation of KPP-5 Rail Fastener Elastic Deformation