水下连续发射弹体干扰特性及发射时序优化

With the increasing demand for saturation attacks, the research on the optimization of launch sequence of projectiles launched successively underwater has become important and urgent. Considering that the hydrodynamic interferences between two underwater projectiles are the main factor affecting launch safety, this paper studies the interference characteristics of projectiles launched successively underwater based on the overlapping mesh methods. By analyzing the flow field, it is found that the hairpin vortices formed by the projectile with an angle of attack are the main reason leading to the attitude difference between two projectiles. An interference evaluation model is established according to the interference between the projectiles under the conditions of different transport speeds, time intervals and space intervals. To ensure that the former projectile interferes little with subsequent projectiles, the launch sequence of projectiles fixed at a launch tube is optimized based on the improved greedy algorithm, in which the shortest launch duration is taken as the goal and the comprehensive evaluation function as the constraint. The uniform sampling method is used to verify the accuracy of the optimized results. The results show that the improved greedy algorithm has comparable accuracy and higher efficiency compared with the uniform sampling method.