Interior Ballistic Simulation of Underwater Steel Cable Towed Launch Torpedo
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摘要: 针对现有无人水下航行器(UUV)发射鱼雷时出管速度低、发生启动故障后无法顺利出管以及作用在鱼雷上的瞬间推力较大等不足, 提出了结构简单且能与自航发射方案配套的水下钢缆拖拽发射鱼雷基本结构方案。在此基础上, 建立了水下钢缆拖拽发射鱼雷的内弹道模型, 其中包括发射气瓶气体状态模型、发射阀数学模型、气水缸数学模型、拖拽装置数学模型以及鱼雷运动数学模型。最后进行了发射过程仿真, 并对发射气瓶初始充气压力大小、UUV航速以及钢缆弹性等参数对鱼雷发射内弹道的影响进行了分析对比。仿真结果表明: 该方案满足UUV发射鱼雷的要求, 在原理上具备可行性, 且结构本身能够解决自航发射时鱼雷因故障无法顺利出管的应急抛射问题, 并在一定程度上减小了对鱼雷尾部结构强度的要求。Abstract: In view of the limitations of the existing torpedo scheme launched by unmanned undersea vehicles(UUVs), namely the low tube-exit speed of the torpedo, inability to ensure the smooth exit of the torpedo after start-up failure, and large instantaneous thrust on the torpedo, a basic structural scheme is proposed for the underwater steel cable towed launch torpedo. The proposed scheme is simple and compatible with the self-launching scheme. Based on the launch scheme, the internal ballistic model of the underwater steel cable towed launch torpedo was established, including the gas state model of the launching air bottle, mathematical models of the launch valve, air-water cylinder, and towing device, and torpedo motion model. A launch process simulation was performed. In addition, the factors influencing the internal ballistic path of the torpedo launch, such as the initial filling pressure of the launch air bottle, UUV speed, and elastic modulus of the steel cable, were analyzed. The simulation results demonstrate that the scheme meets the requirements of the UUV launch torpedo, is feasible in principle, and possesses a structure that can solve the problem of emergency torpedo launch when the torpedo fails to exit the tube owing to the failure of self-launching, thereby reducing the structural strength requirement of the torpedo tail to a certain extent.
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Key words:
- unmanned undersea vehicle /
- torpedo /
- steel cable tow /
- interior ballistic /
- launch
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