Browse > Article
http://dx.doi.org/10.5762/KAIS.2014.15.6.3435

Nonliear vibration analysis of polyurethane foam  

Kang, Juseok (Dept. of Railway Vehicle System Eng., Korea National University of Transportation)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.6, 2014 , pp. 3435-3441 More about this Journal
Abstract
A dynamic modeling and prediction of polyurethane foam material, which is used as the seat in vehicles is very important for improving the ride quality of vehicle occupants. In this study, parameters to define the nonlinear stiffness and time-variant characteristics of the viscoelasticity of polyurethane foam were obtained using a static compression test. Polynomial functions and convolution integral were used to model the nonlinear and viscoelastic characteristics of polyurethane foam mathematically. The dynamic behaviors excited by the seat floor displacement were analyzed using a numerical integration method for the nonlinear vibration model. As a result, the viscoelastic characteristics of polyurethane foam was found to be an important parameter for improving the ride quality.
Keywords
Dynamic modeling; Nonlinear stiffness; Polyurethane foam; Ride quality; Viscoelasticity;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 A.K. Bajaj, P Davis, "Whole-body vibratory response study using a nonlinear multi-body model of seat-occupant system with viscoelastic flexible polyurethane foam", Industrial Health, 48, pp. 663-674, 2010. DOI: http://dx.doi.org/10.2486/indhealth.MSWBVI-13   DOI
2 L. Zhang, R. Dupuis, "Measurement and identification of dynamic properties of flexible polyurethane foam", J. of vibration and control 17(4) pp. 517-526, 2010. DOI: http://dx.doi.org/10.1177/1077546310363777   DOI   ScienceOn
3 R. Deng, P. Davies, A.K. Bajaj, "Flexible polyurethane foam modelling and identification of viscoelastic parameters for automotive seating applications", Journal of Sound and Vibration 262, pp. 391-417, 2003. DOI: http://dx.doi.org/10.1016/S0022-460X(03)00104-4   DOI   ScienceOn
4 W.N. Patten, S. Sha, C. Mo, "A vibration model of open celled polyurethane foam automotive seat cushions," Journal of Sound and Vibration, Vol 217, No. 1, pp. 145-161, 1998. DOI: http://dx.doi.org/10.1006/jsvi.1998.1760   DOI   ScienceOn
5 J.S. Kang, "Human Body Vibration Analysis under Consideration of Seat Dynamic Characteristics", Journal of the Korea Academia-Industrial cooperation Society, Vol. 13, No. 12, pp. 5689-5695, 2012. DOI: http://dx.doi.org/10.5762/KAIS.2012.13.12.5689   과학기술학회마을   DOI   ScienceOn
6 Y.G. Kim, C.K. Park, S.W. Kim, K.H. Kim, J.S. Paik, "Analysis of the frequency weighting curve for the evaluation of ride comfort", Vol. 13, No. 6, pp. 552-558, 2010.   과학기술학회마을
7 A.C.J. Luo, R.P.S. Han, "AA Quantitative Stability and Bifurcation Analyses of the Generalized Duffing Oscillator with Strong Nonlinearity," J. Franklin Inst. Vol. 334B, No. 3, pp. 447-459, 1997. DOI: http://dx.doi.org/10.1016/S0016-0032(96)00089-0   DOI   ScienceOn
8 M. J. Griffin 1990 Handbook of human vibration[ London] Academic Press.