Countermeasure Method of Multi-torpedo Against Soft Defense Layer of Submarine

Based on the analysis of defense way of submarine weaponry, the soft defense capability of a submarine is discussed in detail, and the soft defense layer composed of anti-torpedo weaponry is analyzed and modeled. Due to a certain ambiguity of target submarine information, a fuzzy set is used to express various parameters of anti-torpedo weaponry, and accurate calculation is performed to get the exact values and a calculation model of damage degree. In the condition of only considering soft defense layer, the methods for computing hit probabilities of single-torpedo, dou-ble-torpedo and multi-torpedo are gained, and the effectiveness of combined operation is analyzed. Simulation results show that with the number of torpedo increasing the survival probability of torpedo through the soft defense layer is increased, and the surviving probability also increases for same type of torpedo with same hit probability.