浮囊材料弹性模量对直升机着水冲击的影响  

Influence of Float Material Elastic Modulus on Helicopter Water Landing Impact

作　　者：孙智[1] 梅逸迎 侯斌 孙建红[1] 王诗琪 Sun Zhi;Mei Yiying;Hou Bin;Sun Jianhong;Wang Shiqi(Key Laboratory of Civil Aviation Emergency Science and Technology CAAC,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China;COMAC Shanghai Aircraft Design&Research Institude,Shanghai 201120,China)

机构地区：[1]南京航空航天大学民航应急科学与技术重点实验室,江苏南京211106 [2]中国商飞上海飞机设计研究院,上海201120

出　　处：《航空科学技术》2024年第9期45-53,共9页Aeronautical Science & Technology

基　　金：航空科学基金(20200023052002);中央高校基本科研业务费专项基金(2022012,2023055);航天科技集团重点实验室基金(M202100766)。

摘　　要：直升机水上迫降过程中,浮囊材料缓冲特性对直升机着水冲击和安全有着重要的影响。因此,本文采用任意拉格朗日-欧拉(ALE)方法对直升机-浮囊组合体着水冲击过程进行了流固耦合仿真研究,分析了不同浮囊材料弹性模量对直升机着水冲击姿态和冲击过载的影响,对直升机着水冲击的影响机理进行了阐述,通过浮囊吸能百分比揭示了浮囊材料弹性模量对直升机着水冲击过载特性的影响。研究结果表明,直升机着水冲击俯仰角幅值随浮囊弹性模量的增大而减小;直升机垂向过载峰值随弹性模量的增大而减小;浮囊的吸能缓冲性能随弹性模量的增大而增强;当弹性模量从0.167GPa增加至0.667GPa时,浮囊的吸能百分比从10.1%提高至13.6%。During the process of helicopter water landing,the characteristics of the float material have a significant impact on the helicopter's water impact and safety.To study the impact of float material elastic on it,the Arbitrary Lagrangian-Eulerian(ALE) method is used to conduct fluid-structure interaction simulations on the water impact on a helicopter-float combination.The influence on different float material elastic modulus on the helicopter's water landing attitude and impact overload is analyzed.The impact mechanism of helicopter water impact is elucidated.The influence on float material elastic modulus on the impact overload characteristics is revealed through the energy absorption percentage of the float.The result shows that the pitch angle amplitude of the helicopter during water impact decreases with the increase of float elastic modulus.The vertical overload peak of the helicopter decreases with the increase of float elastic modulus.The cushioning performance of the float enhances with the increase of float elastic modulus.When the elastic modulus increases from 0.167GPa to 0.667GPa,the energy absorption percentage of the float increases from 10.1% to 13.6%.

关 键 词：直升机 浮囊 着水冲击 弹性模量 吸能百分比 冲击过载 

分 类 号：V275.1[航空宇航科学与技术—飞行器设计]