Abstract
The improvement of the comfort of vehicles becomes an important problem in the automobile design in recent years. A whole-body vibration that relates to ride comfort, tiredness and so on is one of the factors that relates to the comfort of vehicles. The human body receives the vibration from a seat finally. The automotive seat is consisted mainly 3 parts, a frame, a urethane cushion and a fabric. At the planning phase, the frame of the seat is considered about the safety. A problem of ride comfort was addressed by the urethane. The characteristics of vibration of the frame have not been focused on. It is necessary to understand the characteristics of vibration of the frame. Therefore, the purpose of this paper is to understand the characteristics of vibration of human body-seat coupled system. Understanding the characteristics of the automotive seat, we consider influences of vibration of the frame of the seat on a human.
