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T. Wang, J. Zhou, Z. Zhang, Q. Wang, "Research on Synthetic Spectrum for Time-varying Vibration Loads of Railway Vehicles", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 22.11, 2022, doi:10.4203/ccc.1.22.11

Keywords: railway vehicles equipment, time-varying loads, damage consistency, synthetic spectrum.

Abstract

The durability of equipment mounted on railway vehicles within the expected life is usually tested based on IEC 61373 standard. However, the frequency characteristics and the instantaneous high-amplitude loads of actual time-varying loads cannot be expressed by the load spectrum that given in the IEC 61373 standard, which is significant for the vibration fatigue analysis of the equipment. Therefore, a synthetic method is proposed to obtain the load spectrum that has the has equal damage potential with time-varying vibration loads, based on the fatigue damage spectrum solved in the time domain. Then the applicability of synthetic spectrum for vibration fatigue analysis is verified by measured dynamic stress. The results show that damage evaluated by the synthetic spectrum obtained with the proposed method is consistent with the damage evaluated the measured stress. In additional, the amplitude of synthetic spectrum for the time-varying loads in a maintenance cycle exceeds the standard spectrum at some frequencies, which facilitates accurate assessment of equipment fatigue damage.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 22.11 Research on Synthetic Spectrum for Time-varying Vibration Loads of Railway Vehicles T. Wang, J. Zhou, Z. Zhang and Q. Wang Institute of Rail Transit, Tongji University, Shanghai, China doi:10.4203/ccc.1.22.11 Full Bibliographic Reference for this paper T. Wang, J. Zhou, Z. Zhang, Q. Wang, "Research on Synthetic Spectrum for Time-varying Vibration Loads of Railway Vehicles", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 22.11, 2022, doi:10.4203/ccc.1.22.11 Keywords: railway vehicles equipment, time-varying loads, damage consistency, synthetic spectrum. Abstract The durability of equipment mounted on railway vehicles within the expected life is usually tested based on IEC 61373 standard. However, the frequency characteristics and the instantaneous high-amplitude loads of actual time-varying loads cannot be expressed by the load spectrum that given in the IEC 61373 standard, which is significant for the vibration fatigue analysis of the equipment. Therefore, a synthetic method is proposed to obtain the load spectrum that has the has equal damage potential with time-varying vibration loads, based on the fatigue damage spectrum solved in the time domain. Then the applicability of synthetic spectrum for vibration fatigue analysis is verified by measured dynamic stress. The results show that damage evaluated by the synthetic spectrum obtained with the proposed method is consistent with the damage evaluated the measured stress. In additional, the amplitude of synthetic spectrum for the time-varying loads in a maintenance cycle exceeds the standard spectrum at some frequencies, which facilitates accurate assessment of equipment fatigue damage. download the full-text of this paper (PDF, 7 pages, 1256 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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