Frequency analysis of vertical vibrations acting on a baby transported in a child car seat

• Autorzy: Więckowski D.
• Języki publikacji: EN

Abstrakty

EN

The biggest dangers that may result from human exposure to vibrations caused by vehicle movement occur in automotive transport [6]. The vibrations experienced during vehicle ride may cause a variety of pathological symptoms arising in people. The adverse health effects may also include reduced motion control, blurred vision, or impairment of the ability of free communication, memory processes, or perception [6]. The paper covers the impact of vertical vibrations on a baby riding in a safety seat in a car, with addressing in particular the dangers caused by mechanical vibrations to children in transport facilities. Two options were considered, with the safety seat being installed on either the front or rear car seat. Experimental road tests were carried out with using a dummy representing the baby. The lack of research work on this issue has been emphasised. For the sake of maximum safety, babies should be transported in safety seats. The type approval tests of child safety seats are chiefly focused on the evaluation of protection from harmful collision effects, according to UN ECE Regulation No. 44 [S13]. Regrettably, they do not include tests to determine the influence of vibrations, especially those occurring during “normal” ride, on the child’s body.

Słowa kluczowe

EN

baby in a car seat; vibration impact; ride comfort; human body vibration

• 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: 2013
• Tom: Vol. 20, No. 1
• Strony: 359--366
• Opis fizyczny: Bibliogr. 25 poz., rys.

Twórcy

autor

Więckowski D.

• Automotive Industry Institute (PIMOT) Jagiellońska Street 55, 03-301 Warsaw, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Giacomin, J., Absorbed Power of Small Children, Clinical Biomechanics, Vol. 20, pp. 372-380, 2005.
• [2] Griffin, M. J., Discomfort from Feeling Vehicle Vibration, Vehicle System Dynamics, Vol. 45, No. 7-8, pp. 679-698, 2007.
• [3] Griffin, M. J., Handbook of Human Vibration, Academic Press, London, United Kingdom 1990.
• [4] Gromadowski, T., Wicher, J., Więckowski, D., Bezpieczeństwo i komfort jazdy dziecka przewożonego w dziecięcych fotelikach samochodowych (Safety and Ride Comfort of a Child Transported in a Child Safety Seat), Report of research project N N509 025037 carried out under contract No. 0250/B/T02/2009/37.
• [5] http://www.polloco.pl/pdf/biala_ksiega_pl.pdf: Biała księga, Europejska polityka transportowa w horyzoncie do 2010r.: czas wyborów, Bruksela, 12/09/2001-10-08 COM(2001) 370 (WHITE PAPER, European transport policy for 2010: time to decide. Brussels, 12.9.2001 COM (2001) 370 final).
• [6] Mansfield, N. J., Human Response to Vibration, CRC Press, London, United Kingdom, 2005.
• [7] Nader, M., Modelowanie i symulacja oddziaływania drgań pojazdów na organizm człowieka (Modelling and Simulation of the Influence of Vehicle Vibrations on the Human Body), Prace Naukowe, Transport, Publishing House of the Warsaw University of Technology, Warsaw, Poland 2001.
• [8] Ślaski, G., Strategie sterowania zawieszeniem dla ćwiartki samochodu – porównanie dla kryteriów bezpieczeństwa i komfortu (Control Strategy for Quarter-Car Suspension – Comparison for Safety and Comfort Criteria), Zeszyty Naukowe Instytutu Pojazdów, Nr 2(65)/2007, pp. 5–16, Warsaw University of Technology, Warsaw, Poland 2007.
• [9] Wicher, J., Diupero, T., Więckowski, D., Wpływ drgań fotelika na komfort jazdy dziecka w samochodzie (Impact of Safety Seat Vibrations on the Comfort of Child’s Ride in a Car), Problem Study Report No. BLY.001.09N, Automotive Industry Institute, Warsaw, Poland 2009.
• [10] Więckowski, D., Analiza w dziedzinie czasu drgań pionowych ze względu na komfort podróżowania dziecka w samochodzie (Time-domain analysis of vertical vibrations in respect of the comfort of a child riding in a car), Czasopismo Techniczne – Mechanika (Technical Transactions – Mechanics), 10/109 (5-M/2012), pp. 73–91, Cracow University of Technology, Cracow, Poland 2012.
• [11] Więckowski, D., Wicher, J., Bezpieczestwo i komfort dzieci przewożonych w fotelikach samochodowych (Safety and comfort of children transported in child car seats), Zeszyty Naukowe Instytutu Pojazdów, Nr 1(77)/2010, pp. 77-93, Warsaw University of Technology, Warsaw, Poland 2010.
• [12] Więckowski, D., Wicher, J., Wpływ drgań fotelika na komfort podróżowania dziecka w samochodzie (Influence of vibrations of the child seat on the comfort of child’s ride in a car), Eksploatacja i Niezawodnosc – Maintenance and Reliability, 4(48)/2010, pp. 102-110.
• Standards
• [S1] ISO 2631 1974, Guide for the evaluation of human exposure to whole-body vibration.
• [S2] ISO 2631-1:1997, Mechanical vibration and shock – Evaluation of human exposure to whole-body vibration – Part 1: General requirements.
• [S3] BS 6841:1987, Guide to measurement and evaluation of human exposure to whole-body mechanical vibration and repeated shock.
• [S4] ISO 5982:2001, Mechanical vibration and Shock – Range of idealized values to characterize seated-body biodynamic response under vertical vibration.
• [S5] ISO 7962:1987, Mechanical vibration and Shock – Mechanical transmissibility of the human body in the “z” direction.
• [S6] PN-EN 30326-1:2000, Mechanical vibration. Laboratory method of evaluation of seat vibration in a vehicle. Basic requirements.
• [S7] ISO 2631-4:2001, Mechanical vibration and shock – Evaluation of human exposure to whole-body vibration – Part 4: Guidelines for the evaluation of the effects of vibration and rotational motion on passenger and crew comfort in fixed-guideway transport system.
• [S8] ISO 2631-5:2004, Mechanical vibration and shock – Evaluation of human exposure to whole-body vibration – Part 5: Method for evaluation of vibration containing multiple shocks.
• [S9] PN-S-04100:1991, Vibration – Methods of testing and evaluation of mechanical vibrations at the workplaces in vehicles.
• [S10] PN-N-01352:1991, Vibration. Principles of measurement at the workplace.
• [S11] PN-N-01353:1991, Vibration. Maximum acceptable acceleration values of vibrations transmitted to the human body through hands and exposure evaluation methods.
• [S12] PN-N-01354:1991, Vibration. Maximum acceptable acceleration values of vibrations having general influence on the human body and exposure evaluation methods.
• [S13] UN ECE Regulation No. 44. Uniform provisions concerning the approval of restraining devices for child occupants of power-driven vehicles (“child restraint system”).