Influences of Different Impact Conditions on Aircraft Fuselage Crashworthiness
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摘要: 针对某型飞机FS380到FS500确定机身段,研究了不同冲击条件对机身结构动态响应特性的影响。建立了机身试验段的等比简化有限元模型。分析了0滚转角、带有10°左滚转角以及带有纵向加速度的情况下,垂直坠撞速度v=9.133 m/s时的冲击特性。对比分析了各种情况下机身框段的变形情况和座椅位置处的加速度-时间历程曲线。结果表明:冲击条件的改变会对机身结构的变形以及座椅处加速度的变化产生影响:左滚转角的出现会改变机身的变形量以及峰值加速度的出现时间,纵向冲击的加入会增加地板的变形量但会有限地减小座椅处的峰值加速度,采用合适的应急着陆方式能提高飞机的耐坠毁性能。Abstract: A typical airplane fuselage from FS380 to FS500 is utilized to study the influences of different impact condi-tions on fuselage crashworthiness. The finite element model of the fuselage structure is established and the crashworthi-ness characteristics are simulated when v =9.133 m/s under the condition of 0 roll angle, 10�left roll angle,and withhorizontal acceleration separately. The overall deformation and the acceleration history curves at seats are compared. Theresults show that the left roll angle changes the fuselage deformation and the acceleration at seats obviously,while thedeformation of the floors increases and the acceleration at the seats decreases when the horizontal acceleration is consid-ered. A suitable emergence landing conditions can increase the aircraft crashworthiness.
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Key words:
- fuselages /
- finite element method /
- crashworthiness /
- aircraft
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[1] Alfaro-Bou E,Vaughan V L Jr. Light Airplane Crash Tests atImpact Velocities of 13 and 27 m/sec[R]. NASA TP1042,1977 [2] Castle C B,Alfaro-Bou E. Light Airplane Crash Tests atThree Flight-Path Angles[R]. NASA TP,1210,June 1978 [3] Research for Crashworthiness of Aircraft Structures. NationalAerospace Laboratory NLR[R]. NLR Annual Report,2000 [4] 苟仲秋,孙侠生,宋笔锋. 民机地板以下结构参数变化对复合材料机身适坠性能的影响研究[J]. 机械科学与技术,2008,27(5):620~624 [5] 何欢等. 带油箱结构的机身框段坠撞仿真分析[J]. 航空学报,2008,29(3):627~633 [6] 倪先平,王永亮,荚淑萍等. 直升机下部复合材料典型结构耐坠特性研究[J]. 复合材料学报,2003,20(4):51~57 [7] 刘瑞同,林建平,田浩斌. 基于元件的复合材料结构耐撞性能分析方法[J]. 同济大学学报(自然科学版),2005,33(3):366~371 [8] 王亚峰等. 某飞机机身框段缩比模型坠撞分析[J]. 结构强度研究,2009,(3):19~22 [9] 殷之平,李玉龙,谭申刚. 飞机机身结构非正常着陆耐撞性仿真分析[J]. 机械强度,2010,32:196~201 [10] MSC/Dytran. DYTRAN User's Manual[M]. Los Angeles,Cal-ifornia:The MacNeal Schwendler Corporation,2000:1862205 [11] Jackson K E,Fasanella E L. Crash Simulation of VerticalDrop Tests of Two Boeing 737 Fuselage Sections[M]. U. S.Army Research Laboratory,Vehicle Technology Center,LangleyResearch Center,March 2002
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