Search

The loads on wheelsets, resulting from torsional vibrations have to be considered in the dimensioning of the axles and press fits. The evaluation of these loads is generally done by extensive test runs and measurement of the respective stresses on the axle. With the proposed process and system analysis it will become possible to predict the maximum torques on the basis of analytical methods. The first part handles the system and model description, illustrating the required quality and complexity of the models for an adequate prediction of the system behaviour. In part two, the physical analysis and safety considerations will be described. In a later paper, a comprehensive description is given for a more general understanding of the complex issue, together with a simplified assessment method for the criticality of a product concerning torsional vibrations. The published articles are written on behalf of Bombardier Transportation Switzerland AG. [ABSTRACT FROM AUTHOR]

Squealing of railway block brakes is an annoying noise phenomenon for passengers, staff and residents of railway lines and stations. Compared to squealing of automotive or railway disk brakes there are almost no scientific publications with respect to this topic. The present paper shows the results of vibration tests performed with railway block brakes at freight wagons. Therefore, wagons equipped with cast iron, LL and K brake shoes were investigated with experimental modal analysis and operational modal analysis. Also noise measurements were performed. Possible influences of the preload by the weight of the vehicle on resonance frequencies and vibration shapes of the wheels are investigated via Finite Element Analysis and possible modifications of the railway block test rig at TU Berlin are discussed. [ABSTRACT FROM AUTHOR]

In parallel to an commercial ETCS (European Train Control System) retrofit project for the ICE-T train sets of Deutsche Bahn in which an open source license for the ETCS on-board equipment software, and a software maintenance contract had been contracted for the first time, a research and development project had been started in 2012 and was finished in 2015 with the goal to develop a model based formalization of the official ETCS specification. The objective was to derive from the formal model a vendor-neutral reference software to give future users and test laboratories an independent reference implementation for the assessment of conformity with the specifications. In order for this „reference“ to be trustworthy, it must be completely transparent. Therefore, the „open proofs“ principle should come to use, in which are not only the reference software itself, but also the software tools and „proofs“ were under open source licenses. The paper reports on the results of the work within the international ITEA2 (Information Technology for the European Advancement) funded project. [ABSTRACT FROM AUTHOR]

As announced at the last Congress in Graz, in the group wide project “Identification of the wear reduction potential of the ÖBB-fleet locomotives" some prototypes have been tested for one year and the measured data was analysed. In this paper the vehicle based measures like the special bogie equipment, the monitoring of the wheel wear and the accomplished test runs for investigation of the traction force are presented. Additionally the infrastructural measures like building the specific measuring site in Schwechat, the monitoring of the dynamic forces and the test runs over other measuring sites are introduced. [ABSTRACT FROM AUTHOR]

The EcoTrain project aims at developing a serial hybrid railcar for the Erzgebirgsbahn. A standard class 642 rail vehicle is going to be converted into an innovative hybrid railcar. Three different approaches to hybridization are explained in conjunction with their respective advantages and disadvantages. Furthermore the simulation tool IVIsion which was used to dimension the train components is explained along with the achieved simulation results. The paper concludes with an introduction to the so-called energy management module (EEM). This module predicts the vehicle's movement along the track and calculates recommendations for energy flow and driving style based on the schedule and current position. [ABSTRACT FROM AUTHOR]

The use of heavy shunting locomotives is necessary to run shunting operations smoothly. The targets of the analysis of alternative powertrain configurations for shunting locomotives are fuel saving, creation of a flexible usable locomotive and the increase of the reliability of savings by automation processes. Necessary to that end are modular constructed simulation models, to manage the requirements for locomotives. By the use of modern technologies, especially energy storage, an expedient development is essential to minimize the risk and realizing alternative powertrains for shunting locomotives. The following paper shows the proceeding of the analysis and presents the study results. [ABSTRACT FROM AUTHOR]