航空科学技术2024，Vol.35Issue(9)：45-53,9.DOI:10.19452/j.issn1007-5453.2024.09.005
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
摘要
Abstract
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Key words
helicopter/the float/water impact/elastic modulus/energy absorption percentage/impact overload分类
航空航天引用本文复制引用
孙智,梅逸迎,侯斌,孙建红,王诗琪..浮囊材料弹性模量对直升机着水冲击的影响[J].航空科学技术,2024,35(9):45-53,9.基金项目
航空科学基金(20200023052002) （20200023052002）
中央高校基本科研业务费专项基金(2022012,2023055) （2022012,2023055）
航天科技集团重点实验室基金(M202100766) Aeronautical Science Foundation of China(20200023052002) （M202100766）
Fundamental Research Funds for the Central Universities(2022012,2023055) （2022012,2023055）
Opening Fund of Key Laboratory of EDL Technology CASC China(M202100766) （M202100766）
