Vibration transmissibility behaviour of high order biodynamic models used in vehicle seat design

• Autorzy: Behari N. , Noga M.

Identyfikatory

DOI

10.5604/12314005.1216399

• Języki publikacji: EN

Abstrakty

EN

The effects of vibration transmissibility using high order biodynamic models of four, five and seven degrees of freedom that can replicate a human body exposed to vibration transmissibility while driving was investigated to identify resonant frequencies associated with injury. It was found that these models address vehicle seat deformities and represent the body hop motion when driving. The five degree of freedom models provided the best results to approximate resonant frequencies associated with the legs, lower torso, spine and whole body vibration at the seat person interface, while the driver's hands were on the steering and was supported with a backrest. The four degree of freedom model excluding the backrest was able to replicate experimental data and a sensitivity analysis of the stiffness and damping parameters indicated that this model was more robust compared to the others, and could predict whole body vibration to accommodate for intra subject variability. Non-linear damping and stiffness properties were noticed for acceleration magnitudes greater than 1g root mean square (rms) and for high order models, which provide greater anatomical description to predict injury in contrast to simple models that have large lumped masses to represent the upper and lower torso. In addition, biodynamic models greater than seven degrees of freedom can be utilised with non-linear stiffness and damping techniques to predict vibration and impedance behaviour for greater number of body ligaments applied to old seats or retrofit seat design applications.

Słowa kluczowe

EN

vehicle seat; biodynamic model of higher order; vibration transmissibility; mechanical impedance

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 3
• Strony: 33--40
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Behari N.

• Oman LNG Department of Process Safety Engineering P.O. Box 888 Sur, P.C.: 411, Oman

autor

Noga M.

• Cracow University of Technology Institute of Motor Vehicles and Internal Combustion Engines Jana Pawla II Avenue 37, 31-864 Krakow, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Behari, N., Comparison of Dynamic Models of Humans Sitting on Seats, Master Thesis, University of Stellenbosch, Stellenbosch 2005.
• [2] Brindeu, L., Popa, C., Stefan, C., Hegedus, A., Identification of Human Body Model Sitting on a Vehicle Chair, Proceedings of the 7th Mini Conference on Vehicle System Dynamics, Identification and Anomalies, pp. 333-338, Budapest 2000.
• [3] Griffin, M. J., Handbook of Human Vibration, Academic Press, London 1990.
• [4] International Organisation for Standardisation, International Standard ISO 5982:2001(E), Mechanical vibration and shock-Range of idealised values to characterize seated body biodynamic response under vertical vibration, Geneva 2001.
• [5] Muksian, R., Nash, C. D., A model for the response of seated humans to sinusoidal displacements of the seat, Journal of Biomechanics, Vol. 7. pp. 209-215, 1974.
• [6] Rakheja, S., Boileau, P. E., Whole-body vertical biodynamic response characteristics of the seated vehicle driver, Measurement and model development, International Journal of Industrial Ergonomics, Vol. 22, pp. 449-472, 1998.
• [7] Rakheja, S., Wu, X., Boileau, P. E., A body mass dependent mechanical impedance model for applications in vibration seat testing, Journal of Sound and Vibration, Vol. 253(1), pp. 243-264, 2002.
• [8] Smith, S. D., Kazarian, L. E., The Effects of Acceleration on the Mechanical Impedance Response of a Primate Model Exposed to Sinusoidal Vibration, Annals of Biomedical Engineering, Vol. 22. pp. 78-87, 1994.
• [9] Smith, S. D., Nonlinear Resonance Behaviour in the Human Exposed to Whole-Body Vibration, Journal of Shock and Vibration, Vol. 1, No. 5, pp. 439-450, 1994.
• [10] Smith, S. D., Cushions and suspensions: Predicting their effects on the biodynamic responses of humans exposed to vertical vibration, Heavy Vehicle Systems, Int. Journal of Vehicle Design, Vol. 4, No. 2-4, pp. 296-316, 1997.
• [11] Wu, X., Rakheja, S., Boileau, P. E., Study of Human-Seat Interactions for Dynamic Seating Comfort Analysis, SAE Int. Congress and Exposition, Detroit 1999.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.