when a cylindrical fragment is in the air, it is discovered that windward area is stochastic, so the figure modulus of the cylindrical fragment is not single but variable in a range.
当圆柱形破片在空中飞散时,迎风面积随机变化,导致圆柱形破片的形状系数不再是单一的值,而是一个范围,因此必须对已有的圆柱形破片的形状系数进行修正,才能更準确的预测圆柱形破片在空中的速度衰减。
after synthetically calculating the fragment windward area and the measurement data of the speed, we can obtain the initial velocity of the shot and the decay coefficient of the fragment.
对获得的典型弹片迎风面积和弹片测速数据综合计算,就可获得弹丸初速及弹片衰减系数。
quayside container cranes are easily attacked by typhoon or paroxysmal fitful wind because of the big windward area and the high center of gravity.
岸边集装箱起重机(以下简称「岸桥」)迎风面积大,重心高,故在台风或突发性阵风发生时很容易遭受风力的袭击产生事故。
the reading system of typical fragments「 average windward area is used to read the fragments」 area of cannonball.
典型破片平均迎风面积判读系统主要用于炮弹破片面积判读。