起落架摆振多体动力学建模及其在摆振飞行试验中的应用
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摘要
基于LMS Virtual.Lab Motion平台建立了前起落架摆振刚体动力学模型,并利用落震试验进行初步校核;其次在PATRAN中对起落架关键部件进行柔性化处理,建立前起落架摆振多体动力学模型;然后进行摆振工况仿真,识别出工作模态,并从时域和频域两个角度与飞行试验结果反复对比,不断修改更新模型,完成模型标定;最后用模型扩展试验包线,验证了起落架在整个包线范围内的稳定性。
Rigid body dynamics model of landing gear shimmy is first built in LMS Virtual. Lab Motion platform,and this model is preliminary checked through the drop test. Secondly,key parts of landing gear are processed again into flexible parts in finite element software PATRAN,so the multi-body dynamics model of landing gear shimmy is built. Then shimmy work condition simulation is conducted,the working modal is identified,and modal result is repeatedly compared with flight test result in time-frequency domain, the model is modified and updated continually,finally the model correlation work is finished. At last,test envelope is expanded by initial model,the stability of landing gears in the whole envelope is validated,and shimmy flight test state points are optimized.
Rigid body dynamics model of landing gear shimmy is first built in LMS Virtual. Lab Motion platform,and this model is preliminary checked through the drop test. Secondly,key parts of landing gear are processed again into flexible parts in finite element software PATRAN,so the multi-body dynamics model of landing gear shimmy is built. Then shimmy work condition simulation is conducted,the working modal is identified,and modal result is repeatedly compared with flight test result in time-frequency domain, the model is modified and updated continually,finally the model correlation work is finished. At last,test envelope is expanded by initial model,the stability of landing gears in the whole envelope is validated,and shimmy flight test state points are optimized.
引文
[1]贾天娇,汤阿妮.起落架摆振飞行试验实测数据分析[J].航空工程进展,2014,5(1):64-69Jia T J,Tang A N.Data analysis in landing gear shimmy test[J].Advances in Aeronautical Science and Engineering,2014,5(1):64-69(in Chinese)
[2]Grossman D T.F-15 Nose Landing gear shimmy,taxi test and correlative analyses[R].SAE Technical Paper No.801239,1980
[3]Norton W J.C-17A landing gear shimmy testing[C]//24th Annual Symposium Proceeding-Society of Flight Test Engineers.1993
[4]Fong A,Eng P.Shimmy analysis of a landing gear system[C]//ADAMS International User Conference.Ypsilanti,Michigan:[s.n.],1995
[5]Hetreed C.Preliminary nose landing gear shimmy using MSC[C]//ADAMS Aircraft.MSC.ADAMS North American User Conference.Scottsdale,Arizona,USA,2002
[6]张丹丹,张明.前轮转弯系统减摆性能分析[J].机械设计与制造工程,2015,44(2):21-26Zhang D D,Zhang M.Analysis on the shimmy performance for nose wheel steering system[J].Machine Design and Manufacturing Engineering,2015,44(2):21-26(in Chinese)
[7]邱东海,贾宏光,马伍元,等.摇臂式起落架缓冲机构动态分析与优化设计[J].振动与冲击,2014,33(20):170-175Qiu D H,Jia H G,Ma W Y,et al.Dynamic analysis and optimization for a cushioning mechanism of articulated landing gear[J].Journal of Vibration and Shock,2014,33(20):170-175(in Chinese)
[8]杜进,魏小辉,蔡佳圻,等.油液压缩性对飞机摆振特性的影响[J].航空工程进展,2015,6(2):171-176Du J,Wei X H,Cai J Q,et al.Effects of oil compressibility on landing gear shimmy[J].Advances in Aeronautical Science and Engineering,2015,6(2):171-176(in Chinese)
[9]冯飞,常正,聂宏,等.飞机柔性对前起落架摆振的影响分析[J].航空学报,2011,32(12):2227-2235Feng F,Chang Z,Nie H,et al.Analysis of influence of aircraft flexibility on nose landing gear shimmy[J].Acta Aeronautica et Astronautica Sinica,2011,32(12):2227-2235(in Chinese)
[10]刘冲冲,牟让科,马晓利,等.考虑机体弹性的起落架着陆仿真分析[J].航空工程进展,2011,2(2):188-192Liu C C,Mu R K,Ma X L,et al.Simulation of landing gear drop considering flexible airframe[J].Advances in Aeronautical Science and Engineering,2011,2(2):188-192(in Chinese)
[11]王文选,王安强,白斌.着陆冲击力对起落架摆振的影响[J].应用力学学报,2013,30(5):647-651Wang W X,Wang A Q,Bai B.Influence of landing impact force on landing gear shimmy[J].Chinese Journal of Applied Mechanics,2013,30(5):647-651(in Chinese)
[12]于秀伟,常正,金秀芬.基于Matlab/Simulink的前起落架摆振动力学模型分析[J].航空工程进展,2013,4(3):312-318Yu X W,Chang Z,Jin X F.Analysis of aircraft nose landing gear shimmy dynamic model based on Matlab/Simulink[J].Advances in Aeronautical Science and Engineering,2013,4(3):312-318(in Chinese)
[13]诸德培.摆振理论及防摆措施[M].北京:国防工业出版社,1984Zhu D P.Shimmy theory and anti-shimmy measure[M].Beijing:National Defense Industry Press,1984(in Chinese)
[14]GJB 67A-2008军用飞机结构强度规范,第9部分:地面试验[S].国防科学技术工业委员会,2008GJB 67A-2008 Specification for structural strength of military aircraft,part 9:ground test[S].National Defense Science and Technology Committee,2008(in Chinese)
[15]万晓峰,刘岚.LMS Virtual.Lab Motion入门与提高[M].西安:西北工业大学出版社,2010Wan X F,Liu L.LMS Virtual.Lab Motion introduction and improvement[M].Xi'an:Northwestern Polytechnical University Press,2010(in Chinese)
[16]曾攀.有限元分析及应用[M].北京:清华大学出版社,2004:6Zeng P.Finite element analysis and applications[M].Beijing:Tsinghua University Press,2004:6(in Chinese)
[2]Grossman D T.F-15 Nose Landing gear shimmy,taxi test and correlative analyses[R].SAE Technical Paper No.801239,1980
[3]Norton W J.C-17A landing gear shimmy testing[C]//24th Annual Symposium Proceeding-Society of Flight Test Engineers.1993
[4]Fong A,Eng P.Shimmy analysis of a landing gear system[C]//ADAMS International User Conference.Ypsilanti,Michigan:[s.n.],1995
[5]Hetreed C.Preliminary nose landing gear shimmy using MSC[C]//ADAMS Aircraft.MSC.ADAMS North American User Conference.Scottsdale,Arizona,USA,2002
[6]张丹丹,张明.前轮转弯系统减摆性能分析[J].机械设计与制造工程,2015,44(2):21-26Zhang D D,Zhang M.Analysis on the shimmy performance for nose wheel steering system[J].Machine Design and Manufacturing Engineering,2015,44(2):21-26(in Chinese)
[7]邱东海,贾宏光,马伍元,等.摇臂式起落架缓冲机构动态分析与优化设计[J].振动与冲击,2014,33(20):170-175Qiu D H,Jia H G,Ma W Y,et al.Dynamic analysis and optimization for a cushioning mechanism of articulated landing gear[J].Journal of Vibration and Shock,2014,33(20):170-175(in Chinese)
[8]杜进,魏小辉,蔡佳圻,等.油液压缩性对飞机摆振特性的影响[J].航空工程进展,2015,6(2):171-176Du J,Wei X H,Cai J Q,et al.Effects of oil compressibility on landing gear shimmy[J].Advances in Aeronautical Science and Engineering,2015,6(2):171-176(in Chinese)
[9]冯飞,常正,聂宏,等.飞机柔性对前起落架摆振的影响分析[J].航空学报,2011,32(12):2227-2235Feng F,Chang Z,Nie H,et al.Analysis of influence of aircraft flexibility on nose landing gear shimmy[J].Acta Aeronautica et Astronautica Sinica,2011,32(12):2227-2235(in Chinese)
[10]刘冲冲,牟让科,马晓利,等.考虑机体弹性的起落架着陆仿真分析[J].航空工程进展,2011,2(2):188-192Liu C C,Mu R K,Ma X L,et al.Simulation of landing gear drop considering flexible airframe[J].Advances in Aeronautical Science and Engineering,2011,2(2):188-192(in Chinese)
[11]王文选,王安强,白斌.着陆冲击力对起落架摆振的影响[J].应用力学学报,2013,30(5):647-651Wang W X,Wang A Q,Bai B.Influence of landing impact force on landing gear shimmy[J].Chinese Journal of Applied Mechanics,2013,30(5):647-651(in Chinese)
[12]于秀伟,常正,金秀芬.基于Matlab/Simulink的前起落架摆振动力学模型分析[J].航空工程进展,2013,4(3):312-318Yu X W,Chang Z,Jin X F.Analysis of aircraft nose landing gear shimmy dynamic model based on Matlab/Simulink[J].Advances in Aeronautical Science and Engineering,2013,4(3):312-318(in Chinese)
[13]诸德培.摆振理论及防摆措施[M].北京:国防工业出版社,1984Zhu D P.Shimmy theory and anti-shimmy measure[M].Beijing:National Defense Industry Press,1984(in Chinese)
[14]GJB 67A-2008军用飞机结构强度规范,第9部分:地面试验[S].国防科学技术工业委员会,2008GJB 67A-2008 Specification for structural strength of military aircraft,part 9:ground test[S].National Defense Science and Technology Committee,2008(in Chinese)
[15]万晓峰,刘岚.LMS Virtual.Lab Motion入门与提高[M].西安:西北工业大学出版社,2010Wan X F,Liu L.LMS Virtual.Lab Motion introduction and improvement[M].Xi'an:Northwestern Polytechnical University Press,2010(in Chinese)
[16]曾攀.有限元分析及应用[M].北京:清华大学出版社,2004:6Zeng P.Finite element analysis and applications[M].Beijing:Tsinghua University Press,2004:6(in Chinese)