基于实船试验的作业耙吸船对长江口深水航道通航影响

Influence of Trailing Suction Dredger on Navigation of Yangtze Estuary Deepwater Channel Based on Real Ship Test

为研究长江口耙吸船疏通航道工作时对长江口深水航道通航情况的影响,开展实船试验工作。确保有效开展实船试验,分析耙吸作业船组在长江口的可航水域特征,根据风流压差角、横向漂移等影响因素,确定耙吸装驳作业船组和通航船舶交会宽度的控制原则。选取目标船型耙吸船“长江口01”、开底泥驳船“航驳7001”和“长江口驳2”为试验对象。为体现数据的真实性,航行数据采集以不预设操纵方案,不特别规定会遇距离和边坡利用方案,不干预驾驶人员实际操纵为前提,前后分别安装定位定向仪和船舶姿态仪。通过对收集的数据进行分析,得出耙吸船组作业期间的风流压差角、瞬时航速、瞬时航迹带宽、横向漂移倍数和作业时航道剩余宽度的结论。该研究为耙吸作业时对其他船舶的航行影响分析提供有效的参考数据。

In order to study the influence of operation of the self-propelled trailing suction barge on navigation of Yangtze estuary channel, the real ship tests were carried out. The characteristics of the navigable area for trailing suction barge in the Yangtze estuary were analyzed. Taking the influence factors such as the angle of air flow pressure difference and the lateral drift into account, the control rules for crossing width between the working barge group and shipping vessels are determined. The target barges including "Yangtze Estuary 01", sediment barge "7001" and "Barge 2" are selected for the tests. For a better authenticity in collection of navigation data, there are no presupposed operation plan, no special regulation on the meeting distance and slope utilization scheme, and no interference in actual navigation. The positioning and orientation instruments and ship attitude instruments are installed in the front and the rear of the barges respectively. Through the analysis of the collected data, the wind current pressure difference angle, instantaneous speed, instantaneous track bandwidth, lateral drift multiple and the remaining width of the channel during the operation of the barge group are obtained, which provides effective reference data for the analysis of the navigation impact on other vessels during the trailing suction operation.