Theory and practice of hull dynamic deformation law and heading angle transfer error correction

IF 13 1区 工程技术 Q1 ENGINEERING, MARINE Journal of Ocean Engineering and Science Pub Date : 2023-06-03 DOI:10.1016/j.joes.2023.05.005
Yepin Qu, Jianqiang Liu, Yuhai Lyu, Chaoran Zhang, Tao Li
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Abstract

In order to meet the demand of high-precision heading angle transmission in the transfer alignment of inertial navigation system on moving base, the analytical function relationship between the hull deformation and the turning angular velocity and angular acceleration was derived by using the classical beam theory based on the analysis of the equivalent load exerted by the hydrodynamic force and inertia force on the hull structure during the turning process under the combined action of the steering rudder moment and wave force. The objective law between the angular motion and the azimuth deformation angle of the hull under the combined action of maneuvering and sea waves was revealed. Finally, the correction coefficients were determined according to the left turn and right turn motions of the hull by using the measured data of the ship in the sea trial during the S-shape maneuvering navigation, and the azimuth deformation angle correction was completed. The results indicated that the application of the Qu's bending deformation correction formula could greatly reduce the influence of the hull flexural deformation on the heading angle accuracy, meet the needs of high-precision heading angle transmission, and fully verify the correctness of the hull azimuth deformation law and the heading angle transmission error correction theory. This theory and method provided technical support for establishing high-precision distributed digital reference in the field of transfer alignment of inertial navigation on moving base and the application of heading angle transfer of other shipborne equipment.

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船体动变形规律及航向角传递误差修正的理论与实践
为满足动基惯性导航系统转位对准中高精度航向角传递的需求,在分析转向过程中转向舵力矩和波浪力共同作用下船体结构所受流体动力和惯性力等效载荷的基础上,利用经典梁理论推导了船体变形与转向角速度和角加速度之间的解析函数关系。揭示了在操纵力和海浪的共同作用下,船体角运动与方位变形角之间的客观规律。最后,根据船体左转和右转运动,利用海试中船舶 S 型机动航行时的实测数据,确定了校正系数,完成了方位角变形校正。结果表明,应用瞿氏弯曲变形修正公式可大大降低船体弯曲变形对航向角精度的影响,满足了高精度航向角传输的需要,充分验证了船体方位角变形规律和航向角传输误差修正理论的正确性。该理论和方法为在移动基座惯性导航传递对中领域建立高精度分布式数字基准以及其他船载设备航向角传递应用提供了技术支撑。
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来源期刊
CiteScore
11.50
自引率
19.70%
发文量
224
审稿时长
29 days
期刊介绍: The Journal of Ocean Engineering and Science (JOES) serves as a platform for disseminating original research and advancements in the realm of ocean engineering and science. JOES encourages the submission of papers covering various aspects of ocean engineering and science.
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