FEM/SPH耦合方法在鱼雷入水研究中的应用

摘要

To expand the application of a torpedo in shallow area of the sea, shallow water control technology is very important, and the unsteady motion parameters of the torpedo water entry are the input condition of initial control. In this paper, a simulation model of torpedo water entry is established by the FEM(finite element method)/SPH(smoothed particle hydrodynamics) coupling method, and the process of the torpedo from contacting with water to whole body wetting is simulated. The simulation results are in good agreement with the sea trial data, which indicates that the FEM/SPH coupling method has obvious advantage for solving torpedo water entry problem. Furthermore, the changing rule of movement attitude of torpedo water entry and the acceleration are analyzed by numerical simulation. The pro-posed method may become a reference for the study of torpedo water entry problem.%为了扩大鱼雷浅海区的使用范围,浅水控制技术非常重要,鱼雷入水过程的非定常运动参数是初始控制的输入条件.文中采用有限元/光滑粒子流体动力学(FEM/SPH)耦合方法,建立鱼雷入水仿真模型,对鱼雷从触水到全沾湿过程进行了数值仿真,仿真结果与试验数据吻合较好,说明FEM/SPH耦合方法对于入水问题的研究具有明显的优势.仿真分析了鱼雷入水过程中运动姿态的变化,以及入水冲击加速度的变化趋势,文中所做研究为进一步研究鱼雷入水问题提供参考.