Search

The condition of the wheelset of a running train is controlled by trackside automated control equipment (TACE), which measures parameters of wheel/rail contact and signals about possible damages in wheels. Calculation of strength and lifetime of train running gear and roadbed of rail track should be based on values of wheel vertical impact on rail. The major problem of using TACE is low reliability of measured wheel/rail interaction force values and low repeatability of TACE readings. This problem occurs because wheel/rail interaction is a completely stochastic phenomenon. It is necessary to control the indirect indicators defining studied interaction of wheel and rail. One of these indicators is irregularity of wheel running surface, whose magnitude is regulated and measured in train inspection stations. The dynamic factor Kdas a derived criterion is evaluated and the new system of criteria, ensuring sufficient reliability of vehicle wheel damage measurement data is proposed.

In the situation of dominating in the world tendencies of economic depression as well as the crisis in European region, which is still continuing the companies, which aim at remaining and surviving in the competition, must analyze the surroundings of the competition actively. That concerns the companies, which performs as monopolies in the market, and the companies working in the sector of railways are usually among them. The question which needs to be considered is as follows: what method or methods should be chosen for assessment of business surroundings? In order to answer this question it is necessary to perform the analysis of the estimation of demands for every company, which would help to define the demands of the companies. In this case first of all, it is important to answer such question as: how does the company perform in the market: as a monopoly, an oligopoly or a rival? The next question is what kind of funds is used in the company, which is analyzed: national or private? For this purpose the companies working in the sector of railways must also estimate their demands according to the criteria which were defined above.