摘要
提出了一种油气⁃泡沫铝组合式直升机缓冲装置,基于塑性坍塌应力理论计算模型和有限元模型对单一泡沫铝冲击压溃应力⁃应变进行了计算和仿真分析,计算结果和仿真分析结果进行了相互校验。通过单一泡沫铝冲击压溃试验对理论和仿真模型进行了试验验证。将泡沫铝压溃动态特性曲线融入油气⁃泡沫铝组合式起落架缓冲动力学模型开展耐坠毁性能仿真分析。结果表明,本文提出的油气⁃泡沫铝组合式缓冲器缓冲载荷峰值降低了38%,缓冲效率提升了12.7%,有效提升了直升机起落架缓冲器的耐坠毁性能。
As the major energy absorption of helicopter in crash,the buffer plays an important role in the safety flight of helicopter.A combined oleo-pneumatic and foam-aluminum helicopter buffer is proposed in this paper.Based on the theoretical calculation model of plastic collapse stress and finite element model,the impact crushing stress-strain of single aluminum foam is calculated and simulated.Then the calculation and simulation results are verified.Furthermore,the theory and simulation model are verified by impact crushing test of single aluminum foam.The dynamic characteristics curve of aluminum foam collapse is integrated into the dynamic model of combined oleo-pneumatic and foam-aluminum landing gear,and the crashworthiness performance simulation analysis is carried out.The results show that the peak load of the combined oleo-pneumatic and foam-aluminum buffer is reduced by 38%,and the buffer efficiency is increased by 12.7%.The crashworthiness performance of helicopter landing gear buffer is improved effectively.
作者
韩雨莹
房兴波
陈虎
魏小辉
谢欣宏
HAN Yuying;FANG Xingbo;CHEN Hu;WEI Xiaohui;XIE Xinhong(National Defense Key Discipline Laboratory of Advanced Design Technology for Aircraft,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;China Flight Test Establishment,Xi’an 710000,China)
出处
《南京航空航天大学学报》
CAS
CSCD
北大核心
2022年第2期239-244,共6页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国防卓越青年科学基金(2018-JCJQ-ZQ-053)。
关键词
飞行器设计
起落架
数值分析
抗坠毁
泡沫铝
缓冲效率
aircraft design
landing gear
numerical analysis
crashworthiness
aluminum foam
buffer efficiency
