摘要
水下双拖系统是海洋工程中非常重要的一种拖曳系统,可以用于潜艇通讯、数据传输、海洋测量等。文章根据达朗伯原理建立了拖曳系统的动力学模型,确定了边界条件,根据动量和动量矩定理建立了浮标运动的数学模型,并基于统一的有限差分数值方法建立了整个拖曳系统的数值解法。最后对典型的水下双拖系统进行了仿真计算,结果显示:水下双拖系统运动稳定,说明建立的动力学模型的正确性,及其数值算法的稳定性;浮体的使用使拖缆远离了艇体,很好地保证了潜艇的安全性,说明了浮体使用的必要性。
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 each dragging our new method. The core of section 1 is that we build the three-dimensional equations of motion of cable according to the d＇ Alembert theory. The core of section 2 is that we make only some in the three-dimensional equations of motion of the buoy taken that we use the unified finite difference method to work out the changes from some open literature. The core of section 3 is 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, indiea- ting 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.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2011年第1期82-86,共5页
Journal of Northwestern Polytechnical University
关键词
水下双拖系统
浮标
运动方程
有限差分法
拖缆
buoys, equations of motion, finite difference method, two-part underwater towed system, dragging cable
