ABSTRACT

Tropical ocean environment teems with microorganisms, of which some adhere, either to the static ship hull or while en-route to the destination increasing roughness. A typical voyage analysis takes into account parameters like speed, power, propeller speed, displacement, fouling and weather conditions. Wind and wave data in the present study have been acquired from data buoys deployed along the voyage route from Chennai to Singapore. The differential equation of a ship undergoing acceleration is considered and solved to obtain voyage time and distance. Calculations to reach design speed were performed for various loading conditions. Limited experiments were performed in the towing tank using a ship model for various draft conditions. Granville's similarity law has been relied upon to arrive at the frictional resistance and is discussed in this paper. The loads due to wind and waves were specifically calculated for the ship with a fouled hull heading in its design speed.

摘要

热带海洋环境充满微生物，其中一些会附着在静止的船体上或在前往目的地的途中增加粗糙度。典型的航程分析会考虑速度、功率、螺旋桨速度、排水量、污垢和天气条件等参数。本研究中的风和波浪数据是从沿从金奈到新加坡的航路部署的数据浮标中获得的。考虑并求解船舶加速时的微分方程以获得航行时间和距离。针对各种负载条件进行了达到设计速度的计算。有限的实验是在牵引油箱中使用不同吃水条件的船模型进行的。威' 依据相似定律得出摩擦阻力，并在本文中进行了讨论。风和波浪引起的载荷是专门针对在其设计航速下有污底船体航向的船舶计算的。