斜撑杆对复合材料机身段适坠性能的影响研究  

RESEARCH ON EFFECTS OF OBLIQUE STRUTS ON CRASHWORTHINESS PROPERTIES OF FUSELAGE SECTIONS

作　　者：邹田春[1] 郝鹏[1] 冯振宇[1] 牟浩蕾[1] 

机构地区：[1]中国民航大学民用航空器适航审定技术与管理研究中心,天津300300

出　　处：《机械强度》2013年第4期546-550,共5页Journal of Mechanical Strength

基　　金：中国民航局科技项目(MHRD201010)~~

摘　　要：适坠性已经并将继续是飞机安全的主题。针对典型的运输类飞机复合材料机身段,研究斜撑杆对机身框段适坠性能的影响。建立复合材料机身段有限元模型,通过改变斜撑杆角度和刚度,分析复合材料机身结构在坠撞速度为6.67 m/s时的坠撞特性。对比分析各种情况下座椅与地板连接处的加速度—时间历程曲线和机身段的破坏模式。仿真结果表明,选取合适的复合材料机身段斜撑杆角度和刚度,可显著降低座椅处的过载峰值,有效提高复合材料机身框段适坠性能。Crashworthiness has been and will continue to be the main themes in aircraft safety.The effects of oblique struts on fuselage section crashworthiness are investigated for typical transport aircraft composite fuselage section.A finite element model of composite fuselage section is developed.The impact characteristics of composite fuselage section subjected to 6.67 m/s vertical velocity are analyzed by changing oblique strut angle and rigidity.A contrastive analysis is given of acceleration histories and failure mode of fuselage section.The result shows that the seat peak overload can be significantly reduced by selecting appropriate oblique strut angle and rigidity of composite fuselage section,and crashworthiness capability of composite aircraft structure can be effectively improved.

关 键 词：适坠性 复合材料机身段 斜撑杆 破坏模式 加速度 

分 类 号：V223[航空宇航科学与技术—飞行器设计] TP391.9[自动化与计算机技术—计算机应用技术]