A new method for calculating a two-part underwater towed system

作者：Du Xiaoxu^*; Song Baowei; Pan Guang

来源：Journal of Northwestern Polytechnical University, 2011, 29(1): 82-86.

• Distinctive features
• Dragging cable
• Floating bodies
• Numerical solution
• Simulation result
• Three-dimensional equations of motion
• Two-part underwater towed system
• Underwater towed system

An underwater towed system formerly included a dragging body and a dragging cable. In the past, the dragging body was calculated by the Runge-Kutta method and the dragging cable was calculated by the finite difference method. The distinctive features of our new method are: (1) our system has two dragging cables; (2) it is more convenient to calculate the dragging body also with the finite difference method. Sections 1, 2 and 3 of the full paper explain our new method. The core of section 1 is that we build the three-dimensional equations of motion of each dragging cable according to the d';Alembert theory. The core of section 2 is that we make only some changes in the three-dimensional equations of motion of the buoy taken from some open literature. The core of section 3 is that we use the unified finite difference method to work out the numerical solution of the two-part underwater towed system; we point out that the finite difference method for calculating the whole of two-part underwater towed system produces a different numerical solution from that of one-part underwater towed system. The core of section 4 is that we simulate a certain two-part underwater towed system; the simulation results, given in Figs. 3, 4 and 5, and their analysis show preliminarily that: (1) the two-part underwater towed system moves steadily in the sea, indicating that the equations of motion we established are correct; (2) the use of a floating body distances the dragging cable away from the submarine, thus ensuring its safety and indicating that the use of the floating body is necessary.

• 出版日期2011
• 单位西北工业大学