Gender and anthropometric effects on whole-body vibration power absorption of the seated body

Abstract

The gender and anthropometric effects on vibration absorbed power characteristics of the seated body are investigated through measurements with 31 males and 27 females considering two different back support conditions, and three levels of vertical vibration (0.25, 0.50, and 0.75 m/s 2 rms acceleration) in the 0.5-20 Hz frequency range. The absorbed power responses for the males and females revealed strong gender effect, which could be mostly related to differences in body mass of the two groups. Subsequent analyses were conducted considering different datasets grouped corresponding to three ranges of the body mass-, build-, and stature-related parameters for both the males and females. Notable differences were evident in the absorbed power responses of the males and females with comparable anthropometric dimensions. Males revealed significantly higher peak and total absorbed power responses compared to the females of comparable anthropometric dimensions, except for the lean body mass. The differences, however, were relatively small in the data for males and females of comparable body mass. The peak power for the females, invariably, occurred at a lower frequency than that for the males. The total absorbed power responses revealed some degree of correlations with the body mass, lean body mass, body fat, and hip circumference (r 2 >0.60), irrespective of the back support condition and excitation magnitude for both the genders. KeywordsWhole-body vibration biodynamics, total absorbed power, gender effect, body mass and body fat effects, body stature and build effects

Vertical vibration modelling and vibration response analysis of Chinese high-speed train passengers at different locations of a high-speed train

“…Similar conclusions were drawn in other researches. Dewangan's 10 research shows that the resonance frequency of the human body is around 4–8 Hz. Moreover, in Wu's research, 31 the resonance frequency of the human's head is over 10 Hz, while that of the thorax organs and stomach is 4–6 Hz.…”

“…In recent years, some practical vibration models of human body or passenger vehicle system were developed by some researchers. 4–14 In their models, the system of human body or the passenger vehicle coupling system were treated as an multi-body dynamic model, in which the parameters are determined based on a large number of experimental data obtained from numerous researches and theoretical analyses. Among the researches, Du 4 established the lumped model of the human body and provided a lumped parameter method to calculate the stiffness and damping coefficients of the lumped human model.…”

“…The whole body vibrational responses were studied 6–9 and the gender and anthropometry effects on the whole body vibration were surveyed. 10 Besides, by applying the human–vehicle coupling models, the vibrational responses of passengers with different postures 5,9–13 were studied. Moreover, literature concerning the characteristics of the human body exposed to the vibration along different directions (e.g.…”

Whole-body vibration biodynamics - a critical review: I. Experimental biodynamics

“…The correlation between the AM phase response and the body mass and anthropometry could not be noted, although it has been attempted in a single study (Donati and Bonthoux, 1983). The power absorbed by the body, attributed to vertical WBV, has also been positively correlated with the body mass Dewangan et al, 2018). Wang et al (2006a) investigated relations between vertical vibration and VPA with a number of anthropometric variables for 12 different body support conditions through linear regression analyses.…”

Stiffening Behavior of Supine Humans during En Route Care Transport

“…The nonlinear characteristics of human response under WBV in sitting, standing, and semisupine positions have been studied by many researchers. In most of these studies, the nonlinearity was presented in the form of softening behavior, where the principal peaks in the transfer functions-transmissibility [1][2][3], apparent mass [1,[3][4][5], mechanical impedance [6,7], and absorbed power [8]-shift to the left to lower frequencies with increasing vibration magnitudes. While there is ongoing debate on the source of nonlinearity in the human response under vibration with different magnitudes, one limiting factor in most current studies is in the magnitude of vibration used during testing-mostly less than 3 m/s 2 root mean square (RMS).…”