Using a Virtual Dummy to Simulate Vibration Dose Value for Different Car Occupants

Abstract

The comfort assessment for car occupants is not an easy task to achieve. It [3,4]. In this paper the influence of the anthropometric features (height and weight) and the inclination of the backrest on the VDV has been investigated. The code is an useful tool for predicting at the seat design level the vibrational discomfort.

Modeling human spine using dynamic spline approach for vibrational simulation

“…The relative motion between two vertebrae is influenced by the contact between articular processes (facets) and the interposition of elastic tissue. According to some previous studies [15][16][17]25,26], in the range of vibration frequencies for automotive riding analysis, the translational and torsional elasticity of FSU can be neglected. Therefore, in this field, the most important relative motion among vertebrae is the flexion in the sagittal plane (i.e.…”

“…The posture is depicted in Fig. 6 which is a standard configuration for vibrational behavior assessment of vehicle occupants [20,24,25,30]. For this second investigation the spine sub-model has been integrated in a multibody dynamic model of the whole body adding feet, legs, thighs, arms and forearms with hands.…”

“…In the same year, Valentini and Vita [24] proposed a more detailed threedimensional multibody model suitable for vibrational simulation and riding comfort assessment in compliance to BS 6841 standard. In 2005, Pennestr ı et al [25] use the model proposed by Valentini and Vita to simulate vibration dose value for different car occupants having different anthropometric characteristics. In 2005, Yoshimura et al [26] compared a multibody model of the human spine to experimental tests.…”

“…Some of the introduced models addressing the whole spine description [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] have been able to reproduce the dynamics of the human spine in a very satisfactory way, including local resonance phenomena and spine specific contribution. Their main disadvantage is the complexity due to the excessive number of the degrees of freedom in the description of the spine displacements.…”

“…[15][16][17][18][19][20][21][22]) and multibody dynamics models (i.e. [20,[23][24][25][26][27][28][29]). Both multibody and finite element models are able to take into account important nonlinearities of the dynamic behavior of the human body [30][31][32].…”