COMPARISONS BETWEEN PREDICTED AND MEASURED RIDE COMFORT IN TRAINS: A CASE STUDY ON MODELLING

In this report, simulated ride comfort has been compared with measured ride comfort for the OEresund Train Unit. The comparisons are done using measured floor accelerations, well synchronised to simulated accelerations on the same track section. A short overview of possible modelling error sources was also done. Some possible error sources during measurement are also described briefly. It is found that the simulated ride comfort is lower than the measured comfort level. Lateral accelerations are less underestimated than vertical accelerations. The comfort weighted lateral acceleration RMS values are underestimated by 8-22 per cent relative to measured values, while vertical comfort weighted acceleration RMS values are underestimated by 46-64 per cent. The influence of track data processing, structural dynamics of carbody and a new airspring model has been investigated. By increasing the number of carbody structural eigenmodes and changing airspring model, the deviation between simulated and measured acceleration frequency content decreases. The comfort weighted lateral acceleration RMS values increase by 8-12 per cent with these changes, while vertical values increase by 17-25 per cent. The main effect of the new airspring model is increased excitation of vertical accelerations above 8 Hz. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/1103470X
• Corporate Authors:

  KUNGLIGA TEKNISKA HOEGSKOLAN, FARKOSTTEKNIK

  STOCKHOLM,   Sweden  SE-100 44
• Authors:
  • SUNDVALL, P
• Publication Date: 2001

Language

• English

Media Info

• Features: References;
• Pagination: 103 p.
• Serial:
  • TRITA-FKT
  • Issue Number: 2001:19
  • Publisher: KUNGLIGA TEKNISKA HOEGSKOLAN, FARKOSTTEKNIK
  • ISSN: 1103-470X

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Comfort; Damping (Physics); Forecasting; Measurement; Passengers; Railroad trains; Simulation
• Uncontrolled Terms: Lateral; Vertical
• ITRD Terms: 5405: Acceleration; 9138: Comfort; 5559: Damping; 132: Forecast; 6136: Measurement; 9074: Side; 9103: Simulation; 1268: Train; 1715: Vehicle occupant; 9087: Vertical
• Subject Areas: Passenger Transportation; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00822169
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• Files: ITRD
• Created Date: Jan 7 2002 12:00AM