摘要
适坠性已经并将继续是飞机安全的一个重要关注点。为了研究不同滚转角度对机身结构动态响应特性的影响,针对典型的运输类飞机机身结构,建立货舱地板下部为波纹板布局形式的机身段有限元模型,分析该机身段在0°、5°、10°和15°的滚转角度下,以6.67 m/s的坠撞速度撞击刚性地面时的坠撞特性,对比分析不同滚转角度下机身段的破坏模式和座椅与地板连接处的加速度—时间历程曲线。结果表明:不同滚转角度会对机身结构的变形以及座椅处加速度响应产生显著影响,采用合适的应急着陆方式可以有效提高飞机的适坠性能。
Crashworthiness has been and will continue to be the main concern in aviation safety. The effects of roll angles on fuselage section crashworthiness for civil aircraft were investigated. A fuselage section structure with waved-plate under the cargo floor concerning the typical civil transport category aircraft section is suggested, and the finite element model of fuselage section is developed to simulate the vertical drop test subjected to 6.67 m/s impact velocity under the conditions of 0°, 5°, 10° and 15 ° roll angles respectively. A comparative analysis of acceleration histories and failure modes of fuselage section under every condition are given. The results show that the change of roll angles will significantly affect fuselage deformation and the seat peak overloads, and the crashworthiness capability of aircraft structure can be effectively improved by choosing the appropriate landing way.
出处
《机械强度》
CAS
CSCD
北大核心
2014年第1期139-143,共5页
Journal of Mechanical Strength
基金
中国民航局科技项目(MHRD201010)资助~~
关键词
机身段
适坠性
滚转角度
破坏模式
加速度
Fuselage
Crashworthiness
Roll angle
Failure mode
Acceleration
