Abstract: In this paper, the finite element model of HPoint Machine (HPM)II is constructed, the size and mass of each part, the lumbar support and torso kinematics attitude of the model are verified, the design parameters of seat are measured by the simulation on the attitude of HPM, and the interaction between driver and seat is simulated. Firstly, the geometric model of human body is built based on ANSUR human anthropometry database, the driving attitude is set by using cascade prediction model, and the finite element model of human body is set up based on its geometric model. Then a parametric finite element model for seat is established. Finally the finite element models for human body and seat are assembled together with corresponding boundary conditions set, and the body pressure distribution between human body and seat is simulated under different foam thickness, the position and protrusion of lumbar support, cushion angle and seatback angle, with the influences of these factors on pressure distribution obtained. The method adopted lays a foundation of seat design oriented towards ideal body pressure distribution and provides references for seat comfort design.

Key words: body pressure distribution, Hpoint machine, human body model, seat comfort