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An Evaluation of Various Viscous Criterion Computational Algorithms
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English
Abstract
The viscous criterion (V*C) has been proposed by biomechanics researchers as a generic biomechanical index for potential soft tissue injury. It is defined by the product of the velocity of deformation and the instantaneous compression of torso and abdomen. This criterion requires calculation and differentiation of measured torso/abdomen compression data.
Various computational algorithms for calculating viscous criterion are reviewed and evaluated in this paper. These include methods developed by Wayne State University (WSU), NHTSA (DOT) and Ford. An evaluation has been conducted considering the accuracy of these algorithms with both theoretical and experimental data from dummy rib compressions obtained during a crash test. Based on these results, it is found that:
- V*C results depend on the scheme used in the computation process, the sampling rate and filtering of original raw data.
- The NHTSA method yields the lowest V*C value.
- The WSU method gives about the same, but fluctuating, V*C value as the Ford method.
- The Ford method provides an accurate and smooth V*C result.
It is recommended that the computation method/ process should be standardized.
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Citation
Chou, C., Lin, Y., and Lim, G., "An Evaluation of Various Viscous Criterion Computational Algorithms," SAE Technical Paper 930100, 1993, https://doi.org/10.4271/930100.Also In
Human Surrogates: Design, Development and Side Impact Protection
Number: SP-0945; Published: 1993-03-01
Number: SP-0945; Published: 1993-03-01
References
- “Anthropomorphic Test Devices” Resolution agreed to at the 24th Meeting Orlando, Florida Oct. 31 Nov. 1 1990
- Lau, I. V. Viano D. C. “The Viscous Criterion-Based and Applications of an Injury Severity Index for Soft Tissue” Proceedings of the Thirtieth Stapp Car Crash Conference San Diego, California Oct. 27-29 1986 SAE Paper No. 861882
- Canahan, B. Luther H. A. Wilkes J. O. “Applied Numerical Methods” John Wiley & Son, Inc. 1969 128
- Canahan, B. Luther H. A. Wilkes J. O. “Applied Numerical Methods” John Wiley & Son, Inc. 1969 27
- Chou, C. C. Lin Y. S. “A Computational Technique for Differentiation of Film Analysis Data of Vehicle Barrier Crash Tests” P&MES Technical Report No. EM-91-01 1991