Motion and Mooring Load Characteristics of Floating Beidou Beacons under Different Sea Conditions
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摘要: 针对北斗信标浮体在复杂海况下的运动可靠性与系泊系统安全性问题, 准确评估其运动及载荷响应特性至关重要。文中采用AQWA-OrcaFlex耦合数值仿真方法, 建立了轻型与重型信标浮体的时域运动响应模型。基于系泊方箱试验数据对建模方法进行了初步验证, 确保了数值仿真方法及结果的可靠性和合理性。在此基础上, 针对典型海况, 系统分析了信标的纵荡、天线出水高度及系泊张力统计特性。研究表明, 波高是主导信标各项响应的关键因素。重型信标在各项响应上均显著高于轻型信标, 尤其在高波高长周期海况下, 其响应最为剧烈。文中研究了北斗信标浮体在不同海况下的运动与载荷规律, 为信标的结构优化设计、系泊系统配置提供了参考。Abstract: Accurately assessing the motion and mooring load response characteristics of floating BeiDou beacons under complex sea conditions is crucial for addressing their operational reliability and the safety of the mooring system. This paper employed an AQWA-OrcaFlex coupled numerical simulation method to establish time-domain motion response models for lightweight and heavy beacon buoys. This model was preliminarily validated with experimental data from a moored box test, ensuring the reliability and rationality of the numerical simulation method and its results. Based on this, the statistical characteristics of the beacon’s surge, antenna freeboard, and mooring tension were systematically analyzed under typical sea conditions. Research indicates that wave height is the key factor dominating various beacon responses. Heavy beacons show significantly higher responses in all aspects than lightweight beacons, with the most intense responses occurring under high-wave height and long-period sea conditions. This study revealed the motion and load patterns of floating BeiDou beacons under different sea conditions, providing a reference for their structural optimization design and mooring system configuration.
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Key words:
- BeiDou beacon /
- motion response /
- hydrodynamic analysis /
- mooring system /
- harsh sea condition
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图 7 迎浪侧锚缆张力的水平分量对比曲线
Figure 7. Comparison curves of horizontal tension component at head sea side anchor
图 8 背浪侧锚缆张力的水平分量对比曲线
Figure 8. Comparison curves of horizontal tension component at following sea side anchor
图 10 浪向0°下的信标浮体运动响应因子
Figure 10. Floating BeiDou beacon RAOs at wave heading of 0 deg.
图 11 信标浮体-系泊系统布置示意图
Figure 11. Schematic diagram of beacon buoy-mooring system layout.
图 12 信标浮体纵荡响应统计特性
Figure 12. Statistical characteristics of beacon buoy oscillation response
图 13 信标浮体天线浮出水面高度统计特性
Figure 13. Statistical characteristics of beacon floating antenna’s surface elevation
图 14 信标浮体系泊张力统计特性
Figure 14. Statistical characteristics of mooring tension of the beacon buoy system
表 1 浮式方箱有关参数
Table 1. Parameters of floating box
物理参数 数值 物理参数 数值 方箱宽度/cm 20.0 x轴转动惯量/(g·cm2) 1.5×105 方箱长度/cm 20.0 y轴转动惯量/(g·cm2) 1.5×105 方箱高度/cm 13.2 z轴转动惯量/(g·cm2) 2.1×105 方箱吃水/cm 7.9 系泊绳直径/mm 3.656 方箱质量/g 3 160 系泊绳密度/(g/cm) 0.607 导缆孔高度/cm 0.5 系泊绳长度/m 145.5 系泊绳刚度/N 29.0 
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表 2 北斗信标浮体有关参数汇总
Table 2. Summary of relevant parameters for the BeiDou beacon buoy
物理量 轻型浮标 重型浮标 排水体积/m3 8.287×10−4 9.553×10−4 总质量/kg 0.853 0.979 质心/m (0.0,0.0,-0.15) (0.0,0.0,-0.17) x轴惯性矩/(kg·m2) 1.564 984×10−5 1.835 696×10−5 y轴惯性矩/(kg·m2) 1.565 065×10−5 1.835 732×10−5 z轴惯性矩/(kg·m2) 1.680 19×10−6 2.624 90×10−6 吃水/m 0.268 0.254
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