Evaluation of the strength anisotropy for railway wheels

The results of experimental investigation of railway wheel failures and strength anisotropy due to rolling contact fatigue are presented. The results indicate that plasticity acts to concentrate regions of intense hardening near the edges of contact. The determination of overall mechanical properties of small-scale volumes frequently relies on the indentation technique. Strength characteristics of the wheel material were investigated by dynamic indentation method and portable dynamic indentation tester was used for hardness measurements. It was found that some characteristic force values of the instrumented hardness test are very well correlated to tensile strengt

Evaluation of the strength anisotropy for railway wheels

The results of experimental investigation of railway wheel failures and strength anisotropy due to rolling contact fatigue are presented. The results indicate that plasticity acts to concentrate regions of intense hardening near the edges of contact. The determination of overall mechanical properties of small-scale volumes frequently relies on the indentation technique. Strength characteristics of the wheel material were investigated by dynamic indentation method and portable dynamic indentation tester was used for hardness measurements. It was found that some characteristic force values of the instrumented hardness test are very well correlated to tensile strengt

Evaluation of the strength anisotropy for railway wheels

The results of experimental investigation of railway wheel failures and strength anisotropy due to rolling contact fatigue are presented. The results indicate that plasticity acts to concentrate regions of intense hardening near the edges of contact. The determination of overall mechanical properties of small-scale volumes frequently relies on the indentation technique. Strength characteristics of the wheel material were investigated by dynamic indentation method and portable dynamic indentation tester was used for hardness measurements. It was found that some characteristic force values of the instrumented hardness test are very well correlated to tensile strengt

Internal noise modelling problems of transport power equipment

The acoustic analysis of transport vehicles is presented in this article. Two types of vehicles of Russian production (TEP-60 and M62) were selected for this research. Using ANSYS/Multiphysic software acoustic noise of different power units in the engine sector was simulated. In this paper we present the modelling results of the locomotive internal noise. In ANSYS/Multiphysic anbience the problems of acoustics are solved on the basis of harmonic response analysis by providing harmonic pressure excitation (sine type) at some points of fluid structure and obtaining the pressure distribution in the fluid. By changing the agitation frequency variable sound distribution at the interval of different frequencies is obtained. Constructing the calculation scheme for a three dimensional locomotive model, spatial structure of finite elements is used. The whole construction was described by 3D finite elements FLUID30 designed for a specified acoustic analysis. The presented acoustic calculation model of rolling-stock cabin allows the evaluation of structural solutions and, in case of emergency, taking extra measures in the process of rolling-stock design. The results of acoustic calculation were compared with experimental measurements

Defended Doctoral Dissertation

Information about defended Doctoral Disseration in 2008 is presented. Scientific work (research field - transport engineering) is defended in Kaunas University of Technology

Interdependence of noise and traffic flow

Traffic flows in cities, especially in city centres, are intensive and uneven, moreover, registered noise levels exceed allowable limits. Noise levels have been measured at K. Mindaugo ave. and Birštono street crossing in Kaunas and data of automated traffic flow registration equipment have been used. A constant reduction of noise level from the beginning till the end of the green light has been identified – “hot starts” generated noise dominates. To make estimates of noise and traffic flow interdependency, mathematical statistical models have been applied. Parameter distribution patterns have been analysed, prediction models have been composed

Multicriteria analysis measurement of the road transport corridor impact on the environment

This paper describes how transport is one of the main branches of any economy without which the functioning of a modern economy is, in general, impossible. It ensures necessary economic links and joins all industrial units of a country into one whole, thus establishing the conditions for an economy to function coherently and efficiently. Thus, transport is an important branch of an economy. However, its infrastructure expansion needs high levels of investment. This is why investment projects for the development of the transport structure have to be thoroughly selected and their implementation has to ensure sufficient efficiency. Taking into account that transport generates a number of adverse effects from both transport infrastructures and vehicles, the indirect ones – environmental influences might be included into the group – may have even greater consequences on society than its direct effects