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Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body

On the one hand, considering that the traditional fatigue method of railway freight cars is based on damage as a parameter, the influence of stress waveform cannot be considered. On the other hand, physical experiments have the characteristics of lag, long period, and high cost. The full-scale physi...

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Autores principales: Zhao, Shangchao, Li, Xiangwei, Wang, Dongpo, Li, Wenquan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369509/
https://www.ncbi.nlm.nih.gov/pubmed/35955374
http://dx.doi.org/10.3390/ma15155439
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author Zhao, Shangchao
Li, Xiangwei
Wang, Dongpo
Li, Wenquan
author_facet Zhao, Shangchao
Li, Xiangwei
Wang, Dongpo
Li, Wenquan
author_sort Zhao, Shangchao
collection PubMed
description On the one hand, considering that the traditional fatigue method of railway freight cars is based on damage as a parameter, the influence of stress waveform cannot be considered. On the other hand, physical experiments have the characteristics of lag, long period, and high cost. The full-scale physical test and virtual test of car body are carried out. First of all, the data processing method of small deletion and the inverse problem load acquisition method based on data to data are proposed. Secondly, the dynamic stress calculation method with the bench as the boundary is proposed. Finally, taking the obtained load as the input of the physical and virtual bench, a new fatigue test method for simulating the running attitude of the car body line is completed. The acceleration RMS error of the C70E gondola body is less than 6%, the stress RMS is less than 13%, and the equivalent mileage is 3.125 million highway test results show that the car meets the life requirements of the car body. The inverse problem analysis results of virtual and physical tests are basically consistent, and the study of this method provides a basis for improving the fatigue reliability of freight car bodies.
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spelling pubmed-93695092022-08-12 Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body Zhao, Shangchao Li, Xiangwei Wang, Dongpo Li, Wenquan Materials (Basel) Article On the one hand, considering that the traditional fatigue method of railway freight cars is based on damage as a parameter, the influence of stress waveform cannot be considered. On the other hand, physical experiments have the characteristics of lag, long period, and high cost. The full-scale physical test and virtual test of car body are carried out. First of all, the data processing method of small deletion and the inverse problem load acquisition method based on data to data are proposed. Secondly, the dynamic stress calculation method with the bench as the boundary is proposed. Finally, taking the obtained load as the input of the physical and virtual bench, a new fatigue test method for simulating the running attitude of the car body line is completed. The acceleration RMS error of the C70E gondola body is less than 6%, the stress RMS is less than 13%, and the equivalent mileage is 3.125 million highway test results show that the car meets the life requirements of the car body. The inverse problem analysis results of virtual and physical tests are basically consistent, and the study of this method provides a basis for improving the fatigue reliability of freight car bodies. MDPI 2022-08-08 /pmc/articles/PMC9369509/ /pubmed/35955374 http://dx.doi.org/10.3390/ma15155439 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Shangchao
Li, Xiangwei
Wang, Dongpo
Li, Wenquan
Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body
title Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body
title_full Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body
title_fullStr Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body
title_full_unstemmed Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body
title_short Key Technologies of Physical and Virtual Test Rig for Railway Freight Car body
title_sort key technologies of physical and virtual test rig for railway freight car body
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9369509/
https://www.ncbi.nlm.nih.gov/pubmed/35955374
http://dx.doi.org/10.3390/ma15155439
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