摘要
针对航空座椅的动态冲击试验,目的是航空座椅更好的承受紧急着陆事件和保护乘员安全,但是适航认证的物理动态测试成本过高。采用有限元法建立出合适的航空座椅/假人系统的有限元模型,根据CCAR 27部规章添加边界条件和地板变形进行座椅适坠性的仿真分析。通过与物理试验的结果对比,具有良好的一致性。在垂直冲击下,假人腰椎受到损伤最为严重;座椅板会出现与外框架的连接脱落;连接的滑动螺栓在保护乘客方面不够可靠;地板的变形会对座椅结构进一步产生破坏。利用有限元分析研究了第95百分位假人在飞机乘客座位上的影响,与50百分位的假人相比,假人损伤增加15%~25%,座椅负荷增加10%~20%。为了提高座椅对乘客保护能力,提出座椅改进设计方案,为同类型产品研发提供指导。
The dynamic impact test for aviation seats aims to better withstand emergency landing events and protect the safety of passengers,but the cost of physical dynamic test for airworthiness certification is too high.The appropriate finite element model of the aviation seat/dummy system was established by using the finite element method,and the simulation analysis of the seat falling suitability was carried out by adding boundary conditions and floor deformation according to CCAR Part 27 regulations.Compared with the results of physical tests,it had good consistency.Under the vertical impact,the lumbar spine of the dummy was most seriously damaged.The connection between the seat plate and the outer frame fell off.The connected sliding bolts were not reliable enough to protect passengers.The deformation of the floor further damaged the seat structure.Then the impact of the 95th percentile dummy on the passenger seat of the aircraft was studied by using finite element analysis.Compared with the 50th percentile dummy,the damage of the dummy increased by 15%~25%,and the seat load increased by 10%~20%.In order to improve the protection ability of seats for passengers,an improved design scheme for seats is proposed to provide guidance for the development of similar products.
作者
陈家辉
李艳军
曹愈远
马新宇
CHEN Jia-hui;LI Yan-jun;CAO Yu-yuan;MA Xin-yu(Civil Aviation College of Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)
出处
《科学技术与工程》
北大核心
2023年第34期14879-14887,共9页
Science Technology and Engineering
基金
国家自然科学基金(50705097)
中国民航总局科技基金(MHRD07238)
南京航空航天大学研究生开放基金(kfjj20200725)。
关键词
有限元法
航空座椅
垂直冲击
数值仿真
finite element method
aviation seat
vertical impact
numerical simulation
