面向气流场的舰船上层建筑设计评估
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中国人民解放军92942部队

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Evaluation on Design of Ship Superstructure for Ship Airwakes
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92942 troops of the PLA,Beijing,China,100161

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    摘要:

    舰船气流场是自然风流经舰船后,受船体和上层建筑阻挡,在舰船艉部形成的复杂非定常空气流场。舰船上层建筑设计在满足隐身性、功能性等要求的前提下,为给舰载直升机创造好的起降环境,还需考虑气流场设计。分析提出了面向气流场的舰船上层建筑设计定量评估方法:建立舰载直升机仿真模型,分别置于起降平台空域内各关键路径点,测量其受到的非定场气流施加的力和力矩,记录30s时间内的力和力矩的变化;用0.2到2Hz之间的力和力矩积分平方根(均方根RMS)表示气流场施加在直升机上的载荷,该载荷即对应飞行员的操控负担;力和力矩的时间平均值则对应直升机的控制余度。另外,气流会影响舰船烟囱排烟,起降平台空域的温度变化或变化率可作为评估上层建筑气流场设计的另一指标。

    Abstract:

    The ship airwake is a complex unsteady air flow field formed at the stern of the ship when the natural air flow passes through the ship and is blocked by the hull and superstructure. In order to create a good take-off and landing environment for the helicopter, the design of ship superstructure should not only consider the stealth and function, but also consider the ship airwake. An evaluation method of ship superstructure design for ship airwake was put forward. The force and moment exerted by the unsteady ship airwake on the fixed point of the helicopter in the flight deck airspace were measured, and the change of force and moment in 30s time was recorded. The load exerted on the helicopter by the ship airwake was represented by the integral square root (RMS) between 0.2 and 2Hz, which corresponded to the workload of the flight crew; the time average of the force and moment corresponded to the control margin of the helicopter. In addition, the ship airwake would affect the smoke exhaust of the ship"s chimney, and the temperature gradient of the flight deck airspace could be used as another index to evaluate the design of ship superstructure.

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  • 收稿日期:2020-11-23
  • 最后修改日期:2020-11-23
  • 录用日期:2020-12-17
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