液压过载保护牵引杆在刹车工况下的应用仿真
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摘要
飞机地面牵引过程中因突发事件等因素意外刹车时,通常会产生较大牵引载荷,当其超出飞机部件受力载荷限制,就会造成事故。因此,提出一种具有液压过载保护特性的牵引杆方案,并以B737-800机型为例,基于Adams建立了含接触碰撞的"牵引车-牵引杆-飞机"多体系统模型,对牵引飞机实施刹车过程进行仿真,对采用常规牵引杆和过载保护牵引杆的牵引载荷变化情况进行对比。结果表明,液压过载保护牵引杆可有效削减刹车时引起的牵引载荷峰值。
In normal conditions,huge towing loads will be produced by sudden brake due to various emergencies when aircraft are being towed.Once the loads exceed the loadlimit of aircraft' s relevant components,ground accidents will occur.Given this,a towbar with hydraulic-overload-protection is designed and a contact-impact model of tractor-towbar-aircraft multi-body systems is established focusing on B737-800 on the base of Adams.Comparing the towing loads of the general towbar with the hydraulicoverload-protection towbar when the braking process of towing aircraft is simulated,it turns out that the hydraulic-overload-protection towbar can effectively reduce the peak of towing load caused by braking.
In normal conditions,huge towing loads will be produced by sudden brake due to various emergencies when aircraft are being towed.Once the loads exceed the loadlimit of aircraft' s relevant components,ground accidents will occur.Given this,a towbar with hydraulic-overload-protection is designed and a contact-impact model of tractor-towbar-aircraft multi-body systems is established focusing on B737-800 on the base of Adams.Comparing the towing loads of the general towbar with the hydraulicoverload-protection towbar when the braking process of towing aircraft is simulated,it turns out that the hydraulic-overload-protection towbar can effectively reduce the peak of towing load caused by braking.
引文
[1]石义民,王波.有杆飞机牵引车浅述[J].商用汽车,2011(20):46-50.
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[4]刘晖,顾宏斌,吴东苏.半主动控制起落架缓冲性能初步研究[J].航空学报,2006,27(5):864-868.
[5]朱敏,刘晖,陈舒文.凹坑路面条件下飞机地面牵引载荷的仿真分析[J].机械制造与自动化,2014(2):94-98.
[6]Flores P,Ambr Sio J,Claro J P,et al.Influence of the Contact-impact Force Model on the Dynamic Responseof Multibody Systems[J].Journal of Multi-body Dynamics,2006,220(1):21-34.
[7]宋新,徐超群,孙作琪,等.MH/T3011.3-2006.民用航空器的牵引[S].北京:中国民用航空总局,2006.
[2]李壮云.液压气动与液力工程手册[M].北京:电子工业出版社,2008.
[3]岳国良,李楠.航空液压油体积弹性模量的测定方法[J].合成润滑材料,2011,38(1):19-21.
[4]刘晖,顾宏斌,吴东苏.半主动控制起落架缓冲性能初步研究[J].航空学报,2006,27(5):864-868.
[5]朱敏,刘晖,陈舒文.凹坑路面条件下飞机地面牵引载荷的仿真分析[J].机械制造与自动化,2014(2):94-98.
[6]Flores P,Ambr Sio J,Claro J P,et al.Influence of the Contact-impact Force Model on the Dynamic Responseof Multibody Systems[J].Journal of Multi-body Dynamics,2006,220(1):21-34.
[7]宋新,徐超群,孙作琪,等.MH/T3011.3-2006.民用航空器的牵引[S].北京:中国民用航空总局,2006.