Rudder effectiveness and speed correction for scale model ship testing
Rudder effectiveness and speed correction for scale model ship testing
复制标题
用于比例模型船舶测试的舵效和速度修正
DOI：
10.1016/j.oceaneng.2015.09.041
复制
发表时间：
2015
影响因子：
5
通讯作者：
Y. Tsukada
中科院分区：
文献类型：
--
作者：
M. Ueno;Y. Tsukada
作者曾提出了一种利用其研制的辅助推进器，利用比例模型实现全尺寸等效机动运动的方法——舵效校正。该方法假定一个恒定的螺旋桨转速下的自由运行模型试验，并近似于稳定直线运行条件下定义的方向舵有效修正系数的恒定值。在本文中，作者提出了一种更精确地保证机动运动相似度的方法。详细的方法考虑了操纵运动中方向舵效能和速度响应在外力作用下的相似性。基于该方法的螺旋桨转速和方向舵效能修正系数的时变控制，使比例模型船能更精确地实现与全尺寸船相似的机动运动。利用机动运动模块化数学模型进行的数值模拟表明，与前一种方法相比，该方法在自由运行模型试验中提高了全尺寸等效机动运动的精度。
The authors once proposed a method, rudder effectiveness correction, to realize full-scale equivalent maneuvering motion using scale models with the auxiliary thruster developed by them. The method presumed a free-running model test with a constant propeller rate of revolution and approximated a constant value of rudder effective correction factor defined in a steady straight running condition. In this report the authors propose a detailed method ensuring more precisely the similarity of maneuvering motion than the former one. The detailed method takes into account the similarities both of the rudder effectiveness and speed response during maneuvering motion even in external forces. The time-varying control both of the propeller rate of revolution and the rudder effectiveness correction factor based on the new method enables scale model ships to realize the similar maneuvering motion to full-scale ships more accurately. Numerical simulations using the modular mathematical model of maneuvering motion clarifies how well the detailed method raises the precision of full-scale equivalent maneuvering motion in free-running model tests comparing with the former method.