DIN EN 14067-4:2014-05

This European Standard deals with requirements, test procedures and conformity assessment for aerodynamics on open track. Addressed within this standard are the topics of aerodynamic loadings and resistance to motion, while the topic of cross wind assessment is addressed by EN 14067-6. This European Standard refers to rolling stock and infrastructure issues. It applies to railway operation on standard gauges according to EN 15273. Trains running on open track generate aerodynamic loads on objects and persons they pass. If trains are being passed by other trains, trains are also subject to aerodynamic loading themselves. The aerodynamic loading caused by a train passing an object or a person near the track, or when two trains pass each other, is an important interface parameter between the subsystems of rolling stock, infrastructure and operation and, thus, is subject to regulation when specifying the trans-European railway system. Trains running on open track have to overcome a resistance to motion which has a strong effect on the required engine power, achievable speed, travel time and energy consumption. Thus, resistance to motion is often subject to contractual agreements and requires standardized test and assessment methods. This document supersedes EN 14067-2:2003 and EN 14067-4:2005+A1:2009. During the revision, EN 14067-4 was newly structured and supplemented in order to more clearly differentiate the requirements for vehicles and infrastructure and to more clearly allocate the different method and test procedures with the respective requirement. Relating to aerodynamic loads, the basic requirements regarding safety and environmental protection are the maximum pressure change during the passage of the train and the maximum air speed during the passage of the train. The permissible maximum value of these loads has been taken from the regulation in the standard in order to make the whole package available to the user within one document. This standard supports the basic requirements of Directive 2008/57/EC on the interoperability of the rail system within the Community as well as the associated Technical Specification (TSI). The standard has been prepared in CEN/TC 256 "Railway applications". The committee responsible for this standard is NA 087-00-05 AA "Aerodynamik und aerodynamische Sondereffekte" ("Aerodynamics") of the Railway Standards Committee (FSF) at DIN.