Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques
Railways are one of the most efficient and widely used mass transportation systems for mid-range distances, also being pointed out as the best strategy to reach European Union decarbonisation goals. However, to increase railways attractiveness, it is necessary to improve the quality of the ride, nam...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/4/2277 |
| _version_ | 1797622562050539520 |
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| author | Patricia Silva Diogo Ribeiro Joaquim Mendes Eurico Seabra |
| author_facet | Patricia Silva Diogo Ribeiro Joaquim Mendes Eurico Seabra |
| author_sort | Patricia Silva |
| collection | DOAJ |
| description | Railways are one of the most efficient and widely used mass transportation systems for mid-range distances, also being pointed out as the best strategy to reach European Union decarbonisation goals. However, to increase railways attractiveness, it is necessary to improve the quality of the ride, namely its comfort, by decreasing the vibration at the passenger level. This article describes the experimental vibration modal identification of train seats based on a dedicated set of dynamic tests performed on Alfa Pendular and Intercity trains. This work uses two output-only modal identification techniques: the transmissibility functions and the Enhanced Frequency Domain Decomposition (EFDD) method. The last method allows us to clearly distinguish the seat structural movements, particularly the ones related to torsion and bending of the seat frame, from the local vertical foam vibrations. The natural frequencies and mode shapes are validated by matching the results derived from the transmissibility functions and EFDD method. The identified modal parameters are particularly relevant to characterise the vibration transmissibility provided by the foams (local transmissibility) and the vibration transmissibility derived from the metallic seat frame (global transmissibility). |
| first_indexed | 2024-03-11T09:13:05Z |
| format | Article |
| id | doaj.art-75ee21e4f8344b5ead61364fb40cdc6a |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T09:13:05Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-75ee21e4f8344b5ead61364fb40cdc6a2023-11-16T18:53:27ZengMDPI AGApplied Sciences2076-34172023-02-01134227710.3390/app13042277Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only TechniquesPatricia Silva0Diogo Ribeiro1Joaquim Mendes2Eurico Seabra3CONSTRUCT–LESE, Faculty of Engineering, University of Porto, 4099-002 Porto, PortugalCONSTRUCT–LESE, School of Engineering, Polytechnic of Porto, 4249-015 Porto, PortugalFaculty of Engineering, University of Porto, 4099-002 Porto, PortugalDepartment of Mechanical Engineering, School of Engineering, University of Minho, 4710-057 Guimarães, PortugalRailways are one of the most efficient and widely used mass transportation systems for mid-range distances, also being pointed out as the best strategy to reach European Union decarbonisation goals. However, to increase railways attractiveness, it is necessary to improve the quality of the ride, namely its comfort, by decreasing the vibration at the passenger level. This article describes the experimental vibration modal identification of train seats based on a dedicated set of dynamic tests performed on Alfa Pendular and Intercity trains. This work uses two output-only modal identification techniques: the transmissibility functions and the Enhanced Frequency Domain Decomposition (EFDD) method. The last method allows us to clearly distinguish the seat structural movements, particularly the ones related to torsion and bending of the seat frame, from the local vertical foam vibrations. The natural frequencies and mode shapes are validated by matching the results derived from the transmissibility functions and EFDD method. The identified modal parameters are particularly relevant to characterise the vibration transmissibility provided by the foams (local transmissibility) and the vibration transmissibility derived from the metallic seat frame (global transmissibility).https://www.mdpi.com/2076-3417/13/4/2277passenger train seatdynamic testsmodal identificationtransmissibilityEFDD |
| spellingShingle | Patricia Silva Diogo Ribeiro Joaquim Mendes Eurico Seabra Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques Applied Sciences passenger train seat dynamic tests modal identification transmissibility EFDD |
| title | Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques |
| title_full | Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques |
| title_fullStr | Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques |
| title_full_unstemmed | Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques |
| title_short | Modal Identification of Train Passenger Seats Based on Dynamic Tests and Output-Only Techniques |
| title_sort | modal identification of train passenger seats based on dynamic tests and output only techniques |
| topic | passenger train seat dynamic tests modal identification transmissibility EFDD |
| url | https://www.mdpi.com/2076-3417/13/4/2277 |
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