fa موتور احتراق داخلی Internal Combustion Engines (ICE, ...) پژوهشي Research <p class="Abstract" style="margin: 0cm 0cm 10pt;"><font size="2"><font color="#000000"><font face="Times New Roman">In the current paper, a biomechanical model of human body with unique structure is developed for evaluating the biodynamic responses, the vibration transmissibility and the transmitted accelerations to vertical vibration for the seated position with ignoring backrest support. In this regard, the 6-DoF Lumped-parameter model with six concentrated masses which are connected with linear springs and dampers is presented. Further, the full vehicle model is developed in ADAMS/CAR software in order to utilize the accelerations of seat under various roads excitation for different amount of vehicle speeds. Also, the vibration transmissibility and transmitted accelerations in vertical direction are measured for the different segments of human body including: Pelvis, Abdomen and Diaphragm, Chest, Torso, Back, Head and Neck. Finally, vibration transmissibility and transmitted accelerations due to the roughness of the roads surfaces are investigated for the different segments of human body in frequency domain from 0 to 50 Hz. As it is illustrated the maximum values for transmissibility for different body segments occurred for frequencies equivalent 20 to 30 Hz, it can be concluded that the human body is more sensitive to vibration with frequencies under 30 Hz. </font></font></font></p> Biomechanical, Vibration, Transmissibility, Automotive passenger body, Vehicle model 2333 2345 http://ase.iust.ac.ir/browse.php?a_code=A-10-63-142&slc_lang=fa&sid=1 J. Marzbanrad 180031947532846002418 180031947532846002418 Yes S. Jamali Shakhlavi 180031947532846002419 180031947532846002419 No