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A Study on the Stiffness Characteristics according to the Body Pressure on the Seat Cushion for Vehicle

Affiliations

  • Department of Mechanical Engineering, Graduate School, Kongju National University, Korea
  • R&D Center, Easternftc INC., Korea
  • Division of Mechanical and Automotive Engineering, Kongju National University, Korea

Abstract


Objectives: Since the riding comfort upon seating is determined according to the driving environment or the driver’s preference, objective evaluations are accompanied by many constraints. Methods/Statistical Analysis: Variations in stiffness distribution of the seat cushion were analyzed by using body pressure distribution. First, to identify loaddeflection characteristics of the seat cushion, static load tests were conducted and stiffness characteristics as a function of load were affirmed by application of quadratic spline interpolation method. And, body pressure distribution of the male subject produced upon seating in the cushion was measured under actual vehicle conditions. Findings: Variations in stiffness distribution of the seat cushion produced when a driver comes aboard a vehicle, and the following conclusions could be obtained. First, by conducting static load tests for the seat cushion to obtain load-deflection curves, deflection characteristics per load point were identified. Second, through quadratic function for the load-deflection curves derived from static load tests, stiffness distributions were derived. Stiffness characteristics were continuously varied as a function of load distribution applied to the seat cushion, which was analyzed to have an effect on stiffness distribution as a function of body pressure distribution for the driver. Third, based on body pressure distribution data for the male subject and load-deflection curves for the seat cushion, variations in stiffness of the seat cushion were analyzed as a function of body pressure distribution. As a result, the extent of hardness felt by the human body was greater for the right side even if body pressure of the male subject was shown to be larger in the left-side region. Application/Improvements: Characteristics of seat stiffness distribution as a function of body pressure distribution which were derived in the present study are considered to be utilized for pad development of car seat.

Keywords

Body Pressure Distribution, Deflection, Seat Cushion, Stiffness, Vehicle.

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References


  • Sin LY, Jin PS, Ui NY. A study on improvement of ride comfort for automotive seats by body pressure distribution.The Korean Society of Automotive Engineers. 1997 Jun; 1(84):579–84.
  • Seok CH, In SS, Cheol LH. A study on the IRS(Integrated Restraint Seat) cushion pad shape optimization.Eromonomics Society of Korea. 2002 Nov; 6:27–31.
  • Bin JS, Tae JS. A new method to improve automotive seat-comfort using cushion form pad hardness and hysteresisloss. The Korean Society of Automotive Engineers. 2014 May; 274:888–92.
  • Matthew PR, Lawrence WS, Leda LR. Survey of auto seat design recommendations for improved comfort. Michigan; 1994.
  • Jin PS, Nam MS, Murali S, Hoon LD, Ran LH, Gyun KD.Analysis of body pressure ratio for evaluation of automotive seating comfort. SAE; 2014 Apr. p. 1–4.
  • Geun CY, Chun YH. An analysis of sitting strategies based on driving posture and seating pressure distribution.Korean Institute of Industrial Engineers. 2012 Nov; 103:887–96.
  • Chul LH, Min PH, Hyun NH, Su KJ, Il CH. A study on the comfort evaluation method for automotive seat. The Korean Society of Automotive Engineers. 2007 Jun; 3(219):1412–6.
  • Woon PD, Tae KY, Seok KM, Jin AS, Suk YW. Study on relationship between discomfort and human-body pressure distribution under seating postures. The Korean Society of Automotive Engineers. 2006 Nov; 3(51):1723–8.
  • SAE J 2896. Motor vehicle seat comfort performance measures. SAE International: USA; 2012. p. 1–35.

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