INTER-SUBJECT VARIABILITY OF VIBRATION CHARACTERISTICS OF HUMAN SEATED IN CAR SEAT

概要

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Relationship between vibration discomfort and inter-subject variability of human seated in car seat was investigated. Subjects of 7 male and 3 female from 5 countries with diverse weight distribution participated in the experiment. Transmissibility to head, chest, abdomen, thigh and shank were measured for each subject at different discrete frequencies and the corresponding ride comfort evaluation was conducted. Total of 14 discrete frequencies of sinusoidal waveform in 2 to 15 Hz range were studied. The results, for subject of lightweight, ride comfort was found affected by mainly transmissibility in fore-and-aft direction. Investigation on the effect of phase lag found that lightweight subjects were more sensitive to head-related phase lag while heavyweight subjects were comparatively sensitive to chestrelated phase lag. Despite the various variabilities in each individual, it had been ascertained that transmissibility to chest in up-and-down direction displayed a significant indifference between subjects in the experiment. The main features of this study were the examination on the inter-subjects variabilities with regards to ride comfort, and the finding that similarities can be observed within individual variabilities.
日本デザイン学会の論文
2002-03-31