title: [Biodynamic responses of the seated posture of human upper-body under horizontal and vertical stimuli].
abstract: In this paper, a biodynamic model of human upper-body in the seated posture is developed. Based on d'Alembert's principle, the non-linear biodynamic equation of the modelling is derivated. Furthermore, the function of frequency and amplitude of modelling is obtained by employing the KB method in the non-linear theory. The response of realistic human parameters and the external stimulus on the modelling is simulated by MATLAB. The results show that the modelling presents a plenty of non-linear characteristics. The parameters identified and the stable areas to keep the stabilization of upper-body in the seated posture are discussed. These data can be used to explain and estimate the mechanism for the maintenance of stable trunk posture due to the mechanical shocks transmitted through the vehicle seat.
authors.affiliation: Department of Math and Phys, Qingdao University Technology, Qingdao 266033, China. wang_xishi@hotmail.com
authors.forename: Xishi
authors.initials: X
authors.lastname: Wang
authors.forename: Fuchuan
authors.initials: F
authors.lastname: Jiang
authors.forename: Jian
authors.initials: J
authors.lastname: Ma
authors.forename: Xinping
authors.initials: X
authors.lastname: Hou
mesh_terms: D001334:Automobile Driving; D001696:Biomechanical Phenomena; D006801:Humans; D017116:Low Back Pain / Q000209:etiology; D008954:Models, Biological; D017711:Nonlinear Dynamics; D011187:Posture / Q000502:physiology*; D013131:Spine / Q000502:physiology*; D014732:Vibration