車両前面衝突時のシートベルト仕様差により発生する胸部減速度解析手法に関する考察

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  • Study of Occupant Chest Deceleration Analysis Resulted from Seat Belt Characteristics for Frontal Impact of Vehicle
  • シャリョウ ゼンメン ショウトツジ ノ シートベルト シヨウサ ニ ヨリ ハッセイ スル キョウブ ゲンソクド カイセキ シュホウ ニ カンスル コウサツ

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This paper deals with investigation to determine optimum seat belt characteristics in order to reduce occupant injuries for frontal impact of vehicle at the primary design phase. The first purpose of this investigation is to calculate occupant chest deceleration under one degree of freedom spring and mass model which includes seat belt slack and preload when subjected to half-sine frontal crash pulse. Next we conducted half-sine vehicle acceleration curve sled test for frontal impact under the Hybrid III dummy restrained by the various type of seat belt. In all six comparative test cases, maximum chest deceleration between calculated value and tested value have relatively good compatibility. This paper indicates that the present method can be estimated the maximum effects of a pretensioner as for the relative comparison of occupant chest deceleration when the T.T.F. (Time to Fire) of seat belt pretensioner or force of preload changes.

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