Structural Crashworthiness Standards Comparison: Grade Crossing Collision Scenarios
-
2009-10-20
Details:
-
Creators:
-
Corporate Creators:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Corporate Publisher:
-
Abstract:In support of the Federal Railroad Administration’s (FRA)
Railroad Equipment Safety Program, American and European
grade-crossing collision scenarios were evaluated and
compared. Finite element analyses (FEA) were employed to
subject an FRA-compliant passenger car to grade-crossing
collision scenarios defined in both the proposed FRA Code of
Federal Regulations (CFR) and European Standard (EN)
15227. The proposed FRA collision scenario involved a single
car impacted by a cart. The cart had a punch mounted to it to
hit a specific post of the end frame of the car. The EN 15227
collision scenario involved a complete train consist impacting a
large deformable obstacle that approximates a lorry. The
analyses show that these collision scenarios, while both gradecrossing
scenarios, are very different not only in terms of the
impact object and the amount of initial kinetic energy involved,
but also in terms of how the car is loaded and deformed during
impact. The FRA scenario is shown to be easier to analyze as
well as easier to test than the EN 15227 scenario. Additionally,
the FRA scenario is safer to test because of the levels of initial
energy involved. The FRA scenario also provides clearer
metrics of success. The FRA-compliant car utilized in the
analyses and test conducted for this paper passed both FRA and
EN 15227 grade-crossing collision scenarios according to the
requirements for each respective standard. However, the
analyses show that despite both scenarios providing for energy
absorption in a grade-crossing collision, because the manner in
which the car is loaded and deformed (concentrated vs.
distributed) is different, the FRA performance standard and EN
15227 grade-crossing collision scenarios are not equivalent and
mutual compliance is not guaranteed.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type: