水中爆炸对鱼雷壳体的毁伤准则和判据研究

研究水中爆炸鱼雷壳体的毁伤准则与判据。根据水中爆炸冲击波特征参量的一般形式,提出了一种毁伤准则,给出了基于毁伤律为"0-1"概率分布函数的毁伤准则与判据的获取方法。针对重型鱼雷1∶2环肋圆筒缩比模型进行了两种药量的海上爆炸试验,结合相似性变换得到了重型鱼雷壳体毁伤的定量判据。以该判据分析了各毁伤等级下的峰值超压和比冲量阈值。结果表明,在相同毁伤等级下,随着装药量增加,峰值超压阈值减小,而比冲量阈值增大;装药量越小,两种特征参量阈值的变化幅度越大。

Research on Damage Criterion of Torpedo Shell Subjected to Underwater Explosive Shock Waves

Damage criterion of torpedo shell subjected to underwater explosion is researched. A damage criterion is proposed according to the general form of the characteristic parameters of underwater explosive shock wave. A damage criterion method which is based on “0-1”probability distribution function is proposed. For 1∶2 ring stiffened cylinder scale model of heavy torpedo, the undersea explosion experiments of torpedoes with different charge masses are done. The quantitative criterion of heavy torpedo shell damage is obtained through similarity transformation of scale model. The peak overpressure and specific impulse threshold values of each damage level are analyzed based on this criterion. The results show that the threshold of peak overpressure decreases with the increase in charge mass under the same damage grade, and the threshold of specific impulse increase; and the smaller the charge is, the greater the change amplitudes of the two threshold values are.