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随着掠海飞行器飞行高度的不断降低,海浪和海况条件已成为制约其飞行高度的重要因素,严重时可引起飞行器姿态的倾覆。基于小升角楔形体入水模型和解析法,研究了掠海飞行器主动击水时所产生的撞水力变化特点,得到了击水滑板的外形参数和入水姿态角的选取准则,即入水弹道倾角-2°～0°,滑板等效斜升角β1≥10°,俯仰角变化范围0°～5°、滚动角变化范围-30°～30°,保证掠海飞行器在主动击水条件下产生的撞水力小于最大限定值20 gn的要求,实现了飞行器在恶劣海况下的掠海飞行。采用有限元法进行的三维仿真结果表明,此解析法所计算结果具有较高的可信度。
As the flight altitude of grazing sea-going vehicles continues to decrease, sea-wave and sea-condition conditions have become an important factor restricting their flight altitude. In severe cases, they can cause overturning of attitude of aircraft. Based on small wedge wedge water inflow model and analytical method, this paper studies the characteristics of impact force produced by swept-haul aircraft during active water hammer, and obtains the shape parameters of water skateboard and the selection criteria of water penetration attitude angle, that is, ~ 0 °, equivalent slope angle β1≥10 °, pitch angle range 0 ° ~ 5 ° and roll angle range -30 ° ~ 30 °, to ensure that the buoyancy force of the swept-haul aircraft under active water hammer is less than The maximum limit of 20 gn requirements, to achieve the aircraft in the harsh sea conditions swept the sea. The results of three-dimensional simulation using finite element method show that the results calculated by this method have high reliability.