United States Department of Transportation
i
Review of severe deformation recommended practice through analyses - comparison of two cab car end frame designs
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2005-03-16
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[PDF-2.86 MB]
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Alternative Title:2005 IEEE/ASME Joint Rail Conference
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Abstract:Non-linear large deformation analyses have been conducted
to evaluate the performance of the cab car corner and collision
posts of the Federal Railroad Administration's (FRA)
sponsored state-of-the-art (SOA) end frame design and the
Bombardier M7 design under quasi-static and dynamic test
conditions. Pre-test analysis predictions of the dynamic
performance of the SOA corner post closely match test
measurements. A similar analysis of the corner post was
performed on the M7 design, and the results compared with the
SOA test and analysis results. Using this M7 model, analysis
results for the quasi-static test of the collision post were
developed, and compared with the test measurements. Up to
the onset of material failure, the analysis results and test
measurements closely agree. After the onset of material failure,
the results progressively diverge. Overall, the crashworthiness
performance of the collision posts of the SOA and M7 designs
were found to be essentially the same, and the performance of
the M7 corner post design was found to perform better than the
SOA corner post design. This difference in performance comes
from the sidewall support in the M7 design, which is not
present in the SOA design.
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