The central target of STARDAMP was to provide all stakeholders in the field of damping technologies for rail and wheel with a comprehensive methodology to predict and assess the performance of rail and wheel dampers for a wide variety of applications. A combination of laboratory testing procedures and computer simulation shall replace field tests as far as possible. The STARDAMP consortium brought together leading manufacturers of rail and wheel dampers, the end-users of damping technologies (railway operators, suppliers of rolling stock and bogies/wheel sets), and research institutes and engineering companies with excellent reputation in the field of acoustic simulation and acoustic measurements. French partners are Alstom Transportation, Valdunes SAS, SNCF, Tata Steel and Vibratec. German partners are Deutsche Bahn AG, Gutehoffnungshütte Radsatz GmbH, Schrey & Veit GmbH and TU Berlin. The Institute of Sound and Vibration Research (ISVR, Univ. of Southampton) was included in the consortium as subcontractor. As a first step, the scope and requirements for the STARDAMP tool were defined. Application of the STARDAMP assessment procedure shall not be limited to products already available on the market but it shall be applicable also to future products. In the case of rail dampers, it was necessary to define precisely, what a "rail damper" is, as this term is commonly used also for products with completely different mechanisms. The STARDAMP methodology shall be applicable to devices, which substantially increase the track decay rate when attached to the rail. It furthermore shall cover a wide variety of applications including ballasted track and slab track, all common rail types, wide range of rail pads stiffness and all kinds of traffic (high-speed, regional trains, freight). The speed range shall be 50 km/h - 320 km/h. Software and laboratory test methods shall be user-friendly and easy-to-handle as far as possible given the complexity of the rail-wheel system. Starting from the requirements, the STARDAMP method has been developed going through the following steps: (1) Definition of physical quantities to be measured in laboratory tests; (2) Elaboration of measurement protocols; (3) Validation of laboratory tests in round-robin tests separately for wheel dampers and for rail dampers; (4) Development of the STARDAMP software; (5) Validation of the full STARDAMP method; (6) Development of guidelines for testing the mechanical integrity and durability of dampers; (7) Definition of a measurement protocol for efficient field testing; (8) User-friendly documentation. The method developed for predicting the acoustic performance of rail dampers is based on the assumption that the track decay rate (TDR) of a damped track can be predicted by summing up the measured TDR of a real track and the decay rate measured on a short section of rail equipped with dampers and freely suspended. Measurement protocols for the "short rail method" have been defined. A round robin test was organized, where different partners tested individually the method in their laboratory with equivalent dampers. For assessing the acoustic performance of wheel dampers a method has been developed in STARDAMP, where a modal analysis of a bare wheel based on finite-elements calculations is supplemented by an experimental modal analysis of the wheel with damper. The latter provides the damping ratios of the eigenmodes, which are hardly predictable in FE simulations. For easy input of modal parameters into the STARDAMP software a dedicated 'mp-editor' has been developed. As in the case of the rail dampers the full procedure has been tested in a round robin test, where wheel sets have been circulated among partners. As dampers in service are subjected to a number of environmental conditions that cause ageing of their components and might thus decrease the effectiveness of the noise reduction, test procedures for rail dampers and wheel dampers to simulate the long term impact of environmental conditions (ageing) and of varying load cycles caused by the passing of trains (mechanical integrity) have been developed. The STARDAMP software is documented in manuals and guidelines for the application of the full STARDAMP method have been written. Close cooperation has been established with the Swiss railways SBB. An extensive measurement campaign has been performed by SBB within the frame of a national project in order to gather information on the network-wide track decay rates with the final target to estimate the potential effect of rail dampers.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    STARDAMP: Standardisation of damping technologies for the reduction of rolling noise. Final report


    Beteiligte:
    Asmussen, B. (Autor:in) / Starnberg, M. (Autor:in) / Betgen, B. (Autor:in) / Bouvet, P. (Autor:in) / Martionot-Lagarde, A. (Autor:in) / Margiocchi, F. (Autor:in) / Aubin, F. (Autor:in) / Thompson, D. (Autor:in) / Squiciarini, G. (Autor:in) / Toward, M. (Autor:in)


    Erscheinungsdatum :

    2013


    Format / Umfang :

    143 Seiten, Bilder, Tabellen, 13 Quellen


    Medientyp :

    Report


    Format :

    Print


    Sprache :

    Englisch