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An investigation of the aerodynamic admittances and weighting functions of trains

Sterling, Mark; Baker, Chris; Bouferrouk, Abdessalem; O'Neil, Hugh; Wood, Stephen; Pearce, Wayne; Crosbie, Ewan

Authors

Mark Sterling

Chris Baker

Hugh O'Neil

Stephen Wood

Wayne Pearce

Ewan Crosbie



Abstract

Increasing train speeds combined with the predicted reduction in the weight of new trains ensures that the effect of crosswinds on train stability is of continued interest to the rail industry. Changes in the approaching wind velocity can in turn lead to changes in both the lift and side force on a vehicle. Calculations of the wind induced force can either be undertaken in the frequency domain with knowledge of aerodynamic admittance characteristics or in the time domain using aerodynamic weighting functions. This paper investigates the applicability of developing a universal aerodynamic admittance function and a corresponding analytical weighting function for a variety of train types based on a range of experimental data. It is suggested that only two variables are required to parameterise both the admittance and weighting functions. It is also argued that for certain train types one of these variables can be considered as a constant across a wide range of yaw angles.

Citation

Sterling, M., Baker, C., Bouferrouk, A., O'Neil, H., Wood, S., Pearce, W., & Crosbie, E. (2008, July). An investigation of the aerodynamic admittances and weighting functions of trains. Paper presented at BBAA VI International Colloquium on Bluff Bodies Aerodynamics & Applications, Milano, Italy

Presentation Conference Type Conference Paper (unpublished)
Conference Name BBAA VI International Colloquium on Bluff Bodies Aerodynamics & Applications
Conference Location Milano, Italy
Start Date Jul 20, 2008
End Date Jul 24, 2008
Publication Date Jul 20, 2008
Deposit Date Jan 21, 2015
Peer Reviewed Peer Reviewed
Keywords trains, aerodynamics, weighting
Public URL https://uwe-repository.worktribe.com/output/1010760
Publisher URL http://bbaa6.mecc.polimi.it/papers.html#papers
Additional Information Title of Conference or Conference Proceedings : BBAA VI International Colloquium on Bluff Bodies Aerodynamics & Applications