床面振動外乱に対する立位姿勢の乗り心地評価

抄録

Various transport such as the train and bus are popular system for people. Ride comfort of passenger is one of important factors of these transport system. In general, ride comfort of both sitting and standing conditions depend on the floor or seat acceleration. Human behaviors against floor disturbance should be included for evaluation of vehicle ride comfort to enhance ride comfort and safety because standing passengers must keep their balance on the moving floor. Therefore, in this study, behaviors of human standing on the periodically vibrating floor were measured by using a vibration table and optical motion capture system. Six healthy males kept their balance on the vibrating floor under four conditions, static condition, horizontal vibrating (anteroposterior) condition, vertical vibrating condition, and both anteroposterior and vertical vibrating condition. Averaged anteroposterior and vertical accelerations of head, chest, pelvis, ankle, and center of mass (COM) during standing were evaluated. It is found that anteroposterior and vertical ankle accelerations during vertical vibrating condition and vertical ankle accelerations during both vibrating condition were significantly smaller than those of others. Therefore, information of human standing behavior during floor vibration is useful for evaluation of ride comfort.