基于模型试验的波浪中实船功率及失速预报方法对比  

A Comparative Study on Prediction Methods of Ship Power and Speed Loss in Waves Based on Model Test

作　　者：陆泽华 李建鹏[1] 李传庆[1] LU Zehua;LI Jianpeng;LI Chuanqing(Shanghai Ship and Shipping Research Institute,Shanghai 200135,China)

机构地区：[1]上海船舶运输科学研究所,上海200135

出　　处：《船舶与海洋工程》2021年第5期22-27,共6页Naval Architecture and Ocean Engineering

摘　　要：为对比研究波浪中的实船功率及失速预报方法,以一艘19 000载重吨多用途船为试验对象,开展迎浪规则波中的阻力和自航试验,并分别采用国际拖曳水池会议(International Towing Tank Conference,ITTC)推荐的扭矩转速法(Torque and Revolution Method,QNM)、推力转速法(Thrust and Revolution Method,TNM)、阻力推力一致法(Resistance Thrust Identity Method,RTIM),以及对TNM和RTIM提出的经验修正方式进行失速预报。对比发现:采用这些方法得到的失速预报结果在低海况下基本相近,均在工程允许的精度范围内;受线性波假设影响,波高较高情况下的失速预报结果一般偏大。提出的RTIM经验修正方式考虑了相对旋转效率的影响,适当减小了预报值,且其预报结果与QNM和TNM更接近,证明了其合理性。在实际工程应用中,为节约试验时间与成本,建议采用该方式进行失速预报。In order to compare the prediction methods of ship power and speed loss in waves,a 19000 DWT multi-purpose ship is taken as the research object to carry out the resistance test and the self-propulsion test in regular waves.Three ship power prediction methods recommended by the International Towing Tank Conference(ITTC),i.e.the torque and revolution method(QNM),the thrust and revolution method(TNM)and the resistance thrust identity method(RTIM)are adopted together with the empirical corrections on TRM and RTIM to predict the speed loss of the target ship in waves.It is found via comparing the results of prediction methods that the speed loss predicted by the three methods are basically similar at low sea conditions and all within the allowable accuracy range of the project,but the predicted results are generally larger under large wave conditions as they are affected by the linear wave hypothesis.The empirical correction of RTIM proposed in this paper considers the influence of relative rotation efficiency and appropriately reduces the prediction value to make the prediction result closer to that of QNM and TNM,which is proved rationally.This method is recommended to be used for ship speed loss prediction in practical engineering applications so as to save the test time and cost.

关 键 词：功率增加 失速预报 阻力推力一致法 波浪中自航试验 

分 类 号：U661.3[交通运输工程—船舶及航道工程]