Analysis of the dynamic behavior of the car user in the irregular terrain

Document Type : Research Paper

Authors

1 shahrood university

2 Associate Professor, Department of Aerospace Engineering, Malek-Ashtar University of Technology,Tehran,Iran

Abstract

Many people experience vibration effects on whole-body throughout their lives frequently. Vibrating energy absorbed is exposed all-body caused with vibration hazard in the vertically on body and biodynamic responses from body in speed 2.37 to 5.14 m/s could captivate with car seat on user body, so the vibration energy transferred to a seated people body. In this paper, the human body is modeled as a series/parallel 4 DOF dynamic models of system and use Lagrange equation for calculate head and neck equation and investigation the effect of vibration energy absorbed in whole body. The hybrid model is analyzed with Matlab software for vertical vibration responses and vibration energy absorption. It is shown improvement seat vehicle cause, drastically ameliorate the tolerance to high-intensity vibrations in the 0.8 Hz range with reducing the maximum amplitude ratios and relative displacements of the body.

Keywords

Main Subjects

[1] Radke,A,O,1957, “Car vibration environment”,ASME paper,14 ,57-A,1-9
[2] Von Gierke,H,E.1959, “Transmission of vibratory energy among people body collection,proc”,first National Biophysics Conf,yale university press, new Haven,conn,22 ,pp.66-76
[3] Lundstrom R, Homlund P, 1998, “absoption of energy during all-body vibration airing”, journal of sound and vibration, 22, 78-79.
[4] ISO, 1972, “Guide for the Evaluation of people airing to all body vibration”. International standards organization DIS 2631
[5] Mathews, J, 1973, “the measurement of tractor rid comfort”, SAE meeting Milwaukee, Wis, paper no, 73, pp.1-15.
[6] Mathews,J,1967, “ progress in application of ergonomics to agricultural engineering”, agricultural engineering symp,silsoe, 11 ,pp.64-66
[7] Cieslikowski B, 2009, “Modelling of the vibration damping in an operator’s seat classification”, journal of energ, roln olpan, 9, pp.22-31.
[8] ISO 2631-1,1997, “mechanical vibration and shock”, part3, general.
[9] Liang CC, Chiang CF, 2006, “A study on biodynamic models of seated people subjects under to vertical vibration”, international journal of industrial ergonomics, 36, pp 87-96.
[10] Boileau, Rakheja, 1967, “absorbed power and mechanical impedance of the seated people under to all body vibration in vertically directions”, journal of agric. eng.res, 12, pp. 41-58.
[11] Tajanowskij G, tanasW, 2010, “the analysis of regular wheel loadings distribution at astatically unstable running classification if an agricultural machine on rough surface. Take commission of motorization and power industry in agriculture”, polish academy of sciences branch in Lublin, 10,pp 46-61
[12] Szczepaniak, kromulski, 2011, “analysis of energy flux model in the biomechanical classification people operator”, journal of research and application in agricultural engineering, 55, pp.136-142.
[13] Boileau, Rakheja Xie X, 2001, “absorbed power as a measure of all body vehicular vibration airing”, PhD thesis, Departteman of mechanical engineering, Concordia University Montreal, Quebec, Couldada.
[14]Nawayseh, Griff MJ, 2010, “power absorbed during all-body vertical vibration influences of sitting position of sitting”, journal of sound and vibration, 329, pp.292-298.
[15] Rakheja, Mandapuram S, Dong, 2008, “energy absorption of seated users under to horizontal vibration and role of back support condition”, journal of industrial health, 11, pp.550-561.
[16] Dong, McDowell TW. Schopper, 2006, “Frequency weighting derived from power absorption of fingers hand-arm classification subject to z-axis vibration”, journal of biomechanics, 39, pp.231-235.
[17] Muksian and Nash, C, D, 1974, “a model for the answer of seated people to sinusoidal displacements of the seat”, journal biomechanical, 7, pp.206-215.
[18] Szczepaniak J, Tanas W, Kromulski J,2014, “Vibration energy absorption in the all body classification of a tractor operator ”, annals of agricultural and environment medicine, 21, pp.399-
402. 158
[19] Liang CC, Chiang CF, 2008, “Modeling of a seat people body under to vertical vibration in various automotive positions”, journal of industrial health, 46, pp.125-137
Volume 47, Issue 2
December 2016
Pages 151-158
  • Receive Date: 12 December 2015
  • Revise Date: 02 July 2016
  • Accept Date: 04 November 2016