A new business style is being established by rapid development of IT technology today. The new business style has brought new needs to office environment. The needs over the feeling of sitting accompanying the increase in time to sit on a chair are also one of them. However, it is difficult to evaluate human's feeling and the evaluation in the time of the design is more difficult. Then, this research proposes the evaluation technique of the office chair that used CAE technology. This research considered construction of the simulation system of the body pressure distribution by sitting of a human body. Construction of the numerical model in consideration of a human body and material was considered. Therefore, the influence by the structure of a human body and material property could be expressed in the simulation.
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