Influence of the Load Occupancy Ratio on the Dynamic Response of an Elevator Car System

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In predictions of the dynamic behaviour of an elevator car system, it is important to take into account the influence of passengers’ behaviour in the car. In this paper a simulation model to analyse the influence of various loading car conditions on the dynamic response of the elevator system is developed. This involves the investigation of the dynamic response of the car with different loads. An experimental rig with a rectangular elevator platform fixed on the top of four silent blocks attached to a shaker is designed to conduct experimental tests. The car is excited over a range of frequencies and amplitudes. A number of passengers wearing different type of shoes in the car are investigated. The transmissibility measurements are carried out with a harmonic excitation applied first to an empty car and then to the car with a number of passengers. An excellent agreement from experimental tests with the model predictions is achieved. The passenger’s role to act as a dynamic absorber is assessed and recommendations to achieve the best ride quality under load conditions are provided and summarised.

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128-136

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December 2014

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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[1] ISO 2003, Lifts Measurement of lift ride quality, ISO 18738: 2003(E) (2003).

Google Scholar

[2] I. Herrera and S. Kaczmarczyk, The Assessment of Vibration Absorption Capacity of Elevator's Passengers, 7th International conference on Modern Practice in stress and Vibration Analysis, Journal of Physics: Conference Series 181(2009).

DOI: 10.1088/1742-6596/181/1/012081

Google Scholar

[3] I. Herrera, H. Su and S. Kaczmarczyk, Investigation into the damping and stiffness characteristics of an elevator car system, Applied Mechanics and Materials, Trans Tech Publications. 24-25 (2010) 77-82.

DOI: 10.4028/www.scientific.net/amm.24-25.77

Google Scholar

[4] M.J. Griffin: Handbook of Human Vibration, Academic Press Limited, London, (1990).

Google Scholar

[5] J. Rosen and M. Arcan, Modeling the Human Body/Seat System in a Vibration Environment, Journal of Biomechanical Engineering. 125 (2003) 223-231.

DOI: 10.1115/1.1559894

Google Scholar

[6] X. Linan, Z. E, L. Mingli, S. Xiaochun and Z. Fan, Human Vibration Characteristic and Experiment Research on Man-Machine System in Dynamic Environment, 9th Inernational Conference on Computer-Aided Industrial Design and Conceptual Design. (2008).

DOI: 10.1109/caidcd.2008.4730545

Google Scholar

[7] Ya Huang, Mechanism of nonlinear biodynamic response of the human body exposed to whole-body vibration, Thesis, Faculty of Engineering, Science and Mathematics, Institute of Sound and Vibration, University of Southampton.

Google Scholar

[8] G.H.M.J. Subashi, Y. Matsumoto and M.J. Griffin, Apparent mass and cross-axis apparent mass of standing subjects during exposure to vertical whole-body vibration, Journal of Sound and Vibration. 293 (2006) 78-95.

DOI: 10.1016/j.jsv.2005.09.007

Google Scholar

[9] G.H.M.J. Subashi, Y. Matsumoto and M.J. Griffin, Modelling resonances of the standing body exposed to vertical whole-body vibration: Effects of posture, Journal of Sound and Vibration. 317 (2008) 400-418.

DOI: 10.1016/j.jsv.2008.03.019

Google Scholar

[10] A.A. Nikoyan, A.A. Zadpoor, Mass-spring-damper modelling of the human body during running and hopping - an overview, Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. Review (2011) 1121-1135.

DOI: 10.1177/0954411911424210

Google Scholar

[11] X. Zheng and J.M.W. Brownjohn, Modeling and simulation of human-floor system under vertical vibration, Smart Structures and Materials 2001. Proceedings of SPIE 4327 (2001).

DOI: 10.1117/12.436586

Google Scholar

[12] T.C. Gupta, Identification and Experimental Validation of Damping Ratios of Different Human Body Segments Through Anthropometric Vibratory Model in Standing Posture, Transactions of the ASME, 129 (2007) 566-574.

DOI: 10.1115/1.2720917

Google Scholar

[13] F.M.L. Amirouche, M. Xie, A. Patwardhan, Optimization of the Contact Damping and Stiffness Coefficients to Minimize Human Body Vibration, Journal of Biomechanical Engineering. 116 (1994) 413-420.

DOI: 10.1115/1.2895792

Google Scholar

[14] N. Even-Tzur, E. Weisz, Y. Hirsch-Falk and A. Gefen, Role of EVA viscoelastic properties in the protective performance of a sport shoe: Computational studies, Bio-Medical Materials and Engineering 16 (2006) 289-299.

Google Scholar

[15] Q.H. Ly, A. Alaoui, S. Erlicher, and L. Baly, Towards a footwear design tool: Influence of shoe midsole properties and ground stiffness on the impact force during running. Journal of Biomechanics. 43 (2010) 310-317.

DOI: 10.1016/j.jbiomech.2009.08.029

Google Scholar

[16] J.F. Wilson and R. D. Rochelle, Football dynamics for racewalkers and runners barefoot on compliant surfaces. Journal of Biomechanics. 42 (2009) 2472-2478.

DOI: 10.1016/j.jbiomech.2009.07.020

Google Scholar

[17] W. Qassem, Impulse response due to jumping on shoes of various stiffness and damping, Bio Medical Materials and Engineering 13 (2003) 167-180.

Google Scholar

[18] B. Balachandran, Vibraciones, Thomson, (2006).

Google Scholar

[19] Da Silva, Vibration, Damping, Control, and Design, CRC Press, (2007).

Google Scholar

[20] H.P. Den Hartog, Mechanical Vibrations, Mc Graw-Hill, (1956).

Google Scholar

[21] J.L. Yus, Weight distribution of elevator car components for different sizes, MP Ascensores, Zaragoza, Spain, Internal Report. (2013).

Google Scholar