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Vibrational characteristics of tractor seat cushion materials and ride comfort

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Title Vibrational characteristics of tractor seat cushion materials and ride comfort
Not Available
 
Creator Mehta, C.R., Tewari, V.K.
 
Description Not Available
Tractor seat design can be used as a means to modify loads on body structures
to reduce operator’s discomfort. The overall comfort and performance of the
tractor seating system consist oi fi-ame. cushion. covers. suspension and
damping mechanisms. Vibration attenuation in a tractor seat is achieved by
selecting the proper suspension and damping mechanism. The vibration
characteristics of cushion materials are often overlooked. This paper describes
a method of vibration characterisation of tractor seat cushion materials to
improve operator’s comfort. Nine commercially available seat cushion
materials of different density, thickness and composition were randomly
selected for this study. Transmissibility data were obtained by measuring input
acceleration values on the base plate and output acceleration values at mass at
different frequencies from 1 to 7 Hz. It was observed that vibration
transmissibilities at resonance and the resonance frequency were significantly
affected by the thickness of cushion materials. In the frequency range above the
resonance, especially at frequencies higher than 5 Hz, the thinner sample had a
higher transmissibility than the thicker sample. In contrast, over the frequency
range below the resonance, especially at frequencies lower than 4 Hz, thicker
samples had a higher transmissibility than the thinner samples. The synthetic
rubber foam cushion materials l.9D (thickness of 101 mm, density of 69.72
kg/m3
) and D (thickness of 54 mm, density of 68.70 kg/m3
) may be
recommended for tractor seat pan and backrest cushion materials, respectively
on the basis of vibration characteristics.
Not Available
 
Date 2017-03-24T05:55:07Z
2017-03-24T05:55:07Z
2002
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/3296
 
Language English
 
Relation Not Available;
 
Publisher Journal of Low Frequency Noise, Vibration and Active Control