甲板驳船滚装大型货物压载水调节与搁浅计算

Ballast water adjustment and Ro/Ro operation in neaped condition for heavy lifts cargoes

为解决不同水文和码头条件下甲板驳船大型货物滚装上/下船问题,常常需要采用不同方法来调整驳船的姿态.通过对船舶搁浅状态下的浮态分析,建立了搁浅与压载水调节共用模型,并通过受力平衡方程,提出了同时适用的计算方法.该方法可进行滚装实时和全程的压载水量、搁浅力等相关要素的计算,确定合适的驳船姿态调整方式.采用曲线拟合方法建立的驳船压载水量与重心的函数关系式,易于计算机程序的编制与运算.实例计算及应用验证了该方法的正确性.对内河和航道条件较差的沿海使用小驳船滚装超重货物的情况尤为适用.

Different methods are usually used to adjust barge status when heavy lifts are discharged from the deck barge in different hydrological and jetty conditions. This paper established the balance equation of bearing force of roll-on/roll-off （Ro/Ro） operation, analyzed the different payload conditions in Ro/Ro operation and built the calculation method in neaped and floating conditions. The quantity of ballast water, sustaining force and other related factors could be calculated in Ro/Ro operation in real time, and the adjustment method for the barge status could be confirmed. The functional relation formula between quantity of ballast water and center of gravity were established by using curve-fitting method, which was easy to build the computer programs and calculation. Analytical calculation and application validate the correctness of the proposed method, which be very useful in analyzing the feasibility of Ro/Ro operation of the heavy lifts in the smaller deck barge in inland river and coast waters with poor waterway.