The friction sensitivities of high explosives and primary explosives were tested by the BAM Friction Apparatus with the Up-and-Down method and an equal interval of logarithm of a load was used as the testing interval. Only the logarithm standard deviation cannot estimate variation in sensitivity data because the distribution of ignition probability from the experimental results is related not only to the logarithm standard deviation but also the mean. Therefore, this research evaluated the variation by the range of loads corresponding to ignition probabilities.
本研究は荷重の対数を試験水準としてUp-and-Down試験法により爆薬および起爆薬の摩擦感度を調べた。摩擦による発 火確率の分布の広がりは，荷重の対数を確率変数として得た標準偏差だけではなく，平均値にも関係するので，本研究は物 質の感度データのばらつきを発火確率に対応する爆点の範囲（爆発範囲）により評価することを検討した。
Friction sensitivity, Up-and-Down method, Statistical analysis, Explosive.