STUDY ON FULL-SCALE IDENTIFICATIONS OF HYDRODYNAMIC PROPERTIES AND MANEUVERING PERFOEMANCE OF A SHIP

船舶水动力特性及操纵性能全尺度识别研究

• 批准号: 12450402
• 负责人: KOSE Kuniji
• 金额: $ 6.14万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450402/
• 关键词: MATHEMATICAL MODEL OF SHIP MANEUVERING MOTION; FREE-RUNNING MODEL TEST OF MANEUVERING MOTION; CAPTIVE MODEL TEST OF MANEUVERING MOTION; KINEMATIC GPS; REAL-TIME KINEMATIC GPS; HIGH ACCURACY POSITION MEASURREMETNS BU GPS; ESTIMATION OF HYDRODYNAMIC P

In the present study, taking the high level capability of Real-Time Kinematic GPS, it has been tried to estimate hydrodynamic force and moment acting on a ship and to identify the mathematical model of maneuvering motion. The outline of the present study is as follows.The measuring accuracy of the Kinematic GPS was assured on Hiroshima-Maru in the small bay. The position measurements of 3 points on board and 1 point on land were carried out and the positions of C.G. angles of yaw and heel were estimated. Their velocity and acceleration components were also estimated. Enough capability of the GPS in estimating such positions, velocities and accelerations were confirmed and finally hydrodynamic forces and moment acting on the ship were successfully estimated. However significant effects of complicated current in the bay were observed.Tank tests were carried out for developing the ways to choose a suitable mathematical model and identifying the parameters of mathematical model. Circular motion tests were developed for measuring hydrodynamic properties of a ship model and motion measurements of the free-running model were performed and the hydrodynamic properties were identified. These showed that the identification of hydrodynamic properties is achieved but the accuracy is very important.Summarizing the results of the current study, it is concluded that

本研究利用实时动态GPS的高性能，对作用在船舶上的水动力和力矩进行了估算，并对船舶操纵运动的数学模型进行了辨识。本研究的主要内容如下：在小海湾的广岛丸上，保证了动态GPS的测量精度。对船上3个点和陆地1个点进行了位置测量，得到了C.G.估计偏航角和横倾角。还估计了它们的速度和加速度分量。GPS在估计这些位置、速度和加速度方面具有足够的能力，并最终成功地估计了作用在船舶上的水动力和力矩。但由于海湾内复杂水流的影响，对模型的选择和参数的确定进行了水槽试验。为测量船模的水动力特性，开展了船舶模型的圆周运动试验，并对自由航行模型进行了运动测量和水动力特性识别。这表明水动力性质的识别是可以实现的，但准确性非常重要。总结当前研究的结果，得出的结论是，