This paper presents a way of approaching the modeling of multibody systems. The proposed model tries to reproduce as closely as possible the driver's skeletal system when a series of commands are activated on board the vehicle. The solid model made with the help of the Inventor program was exported again with the extension .dwg in AutoCAD. The result was 222 solid elements (corresponding to each human bone) for which the import procedures were followed in the MSC ADAMS software. With the help of STEP motion laws we simulated changing the gears of the vehicle on the virtual model. The verification analysis at the end of the simulation showed that the created model has 104 degrees of freedom, 53 moving elements, 20 simple rotational couplings, 2 spherical rotational couplings, 15 fixed joints, 18 imposed movements and that all the kinematic restrictions introduced are valid. The virtual model created can be a tool for analyzing the biomechanical system of the driver for car manufacturers in order to improve the ergonomics of the seat.

Acknowledgements: “The work of the first author is supported by the project ANTREPRENORDOC, in the framework of Human Resources Development Operational Programme 2014-2020, financed from the European Social Fund under the contract number 36355/23.05.2019 HRD OP /380/6/13 – SMIS Code: 123847. The work of the second author was carried out in the framework of the research project DREAM (Dynamics of the REsources and technological Advance in harvesting Marine renewable energy), supported by the Romanian Executive Agency for Higher Education, Research, Development and Innovation Funding – UEFISCDI, grant number PN-III-P4-ID- PCE-2020-0008.”