二级深拖系统的回转运动特性

相对于一级深拖系统,二级深拖系统具有良好升沉补偿功能,并且较易对拖体进行定深或定高控制。在实际工作中,母船经常需要根据探测情进行回转机动。为了研究母船回转过程中拖体运动规律和拖缆构形的变化情况,采用凝集质量法建立了二级深拖系统的数学模型,计算分析了母船不同回转参数下拖体运动状态的变化规律,得到了拖缆的瞬态和稳态构形图。仿真结果表明,在360°稳态回转和360°单圈回转条件下,母船回转半径、拖曳速度均对一级拖体和二级拖体的深度变化以及稳态特性有显著影响。母船小半径大速度回转时,两级拖体的回转半径和深度变化较大,应予以特别关注。

Research of Motion Characteristics of Two-part Deep Towed System during Towing Ship Turning Maneuvers

Compared to one-part towed system, two-part towed system is easy to work at designed depth or height. In actual work, the towing ship often needs to maneuver according to detection data. In order to explore the motion characteristics of towed vehicles and cable configuration during towing ship turning maneuvers, mathematical model of vertical two-part towed system is established using lumped mass method. The change rule of motion state of the two towed vehicles is analyzed using simulation method, and the cable configuration at both transient and steady state is obtained. The result shows that turning radius and towing speed of the towing ship has great influence on the depth change and steady properties of both towed vehicles during 360° steady-state and a single 360° turning maneuver. Turing radius and depth of the two towed vehicles changes greatly when mother ship turns at a small radius and large towing speed, which should be paid special attention.