Shock vibrations are usually experienced in vehicles excited by impulsive input, such as bumps. The frequency weighting functions of the current standards in ISO 2631 and BS 6841 are to help objectively predict the amount of discomfort of stationary vibration. This experimental study was designed to develop frequency weighting shape for shock vibration having various fundamental frequencies from 0.5 to 16Hz. The specks were produced from the response of single. degree-of-freedom model to a half-sine force input. Fifteen subjects used the magnitude estimation method to judge the discomfort of vertical shock vibration generated on the rigid seat mounted on the simulator. The magnitudes of the shocks, expressed in terms of both peak-to-peak value and un-weighted vibration dose values (VDVs) , were correlated with magnitude estimates of the discomfort. The frequency weighting shapes from the correlation were developed and investigated having nonlinearity due to the magnitude of the shock.
[1]
Michael J. Griffin,et al.
Subjective reaction to vertical mechanical shocks of various waveforms
,
1991
.
[2]
Dryver R. Huston,et al.
Whole-body shock and vibration: Frequency and amplitude dependence of comfort
,
2000
.
[3]
Kjell Spång.
Assessment of whole-body vibration containing single event shocks
,
1997
.
[4]
H. Dupuis,et al.
Acute effects of transient vertical whole-body vibration
,
1991,
International archives of occupational and environmental health.
[5]
Anders Kjellberg,et al.
Whole-body vibration: A comparison of different methods for the evaluation of mechanical shocks
,
1991
.
[6]
Örjan Johansson,et al.
Prediction of vehicle discomfort from transient vibrations
,
2005
.