Response analysis of tethered UAV in dynamic wind environment
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摘要: 为探究系留无人机(UAV)的气动性能以及线缆的变形情况，进行系留无人机的动力响应分析。构建系留无人机模型，采用流−固耦合的分析方法、标准k-ε湍流模型和滑移网格技术进行数值模拟，研究不同风速下侧风对系留无人机系统的动力学性能。结果表明，随着侧向风速增加，涡强度显著增加，来风一侧尤为明显。系缆在风力和自身重力的共同作用下发生形变，最大形变量出现在特定位置，且随风速变化而变化，最大形变量为448 mm，10 s内整体平均形变量为145 mm。这一结果可为系留无人机的设计和使用条件提供参考。Abstract: In order to investigate the aerodynamic performance of the tethered unmanned aerial vehicle (UAV) and the deformation of the tether, the dynamic response analysis of the tethered UAV was conducted. A tethered UAV model was developed, and numerical simulations were performed using using a fluid-structure interaction (FSI) analysis method, standard k-ε turbulence model, and slip-grid technology. The dynamic performance of the tethered UAV system under crosswinds at different wind speeds was investigated. The results shows that the vortex strength increases significantly with crosswind speed, particularly on the windward side. The tether deformed under the combined effect of wind and its gravity, and the maximum deformation occurs at a specific location and varies with wind speed. The maximum deformation was 448 mm, and the overall average deformation was 145 mm in 10 s. It can be used as a reference for the design and utilization conditions of tethered UAVs.
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图 10 9 s内系留线缆总形变展示
Figure 10. Demonstration of total deformation of tethered cable in 9 s
图 12 线缆上下端点的等效应力曲线
Figure 12. Equivalent force curves at upper and lower endpoints of cable
表 1 聚四氟乙烯基本参数
Table 1. PTFE basic parameters
参数名称 数值 弹性模量/ MPa 280 泊松比 0.4 密度/ (g·cm-3) 2.2 
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