Research on the effects of submarine evasion on combat effectiveness of active sonobuoy

According to the course of active sonobuoy searching submarine,the effects of submarine evasion on combat effectiveness of active sonobuoy is studied.The mathematical models of active sonobuoy detecting targets are established.According to the theory of smooth averaged sound field in shallow water,the searching scope of active sonobuoy is deduced when the depth of submarine is changed.Basing on the presented models,the searching scope and detection probability of active sonobuoy are estimated,and the effects of different evasion angles,depth and sea environment on searching submarine are amalyzed.Lastly simulation results show that under certain condition the combat effectiveness of active sonobuoy for submarine can be reduced by proper evasion strategy.