| 油液压缩性对飞机摆振特性的影响 |
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| 引用本文： | 杜进,魏小辉,蔡佳圻,王永全.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):171-176. |
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| 作者姓名： | 杜进 魏小辉 蔡佳圻 王永全 |
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| 作者单位： | 1. 南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京,210016
2. 南京航空航天大学飞行器先进设计技术国防重点学科实验室,南京210016;南京航空航天大学机械结构力学及控制国家重点实验室,南京 210016 |
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| 基金项目： | 国家自然科学基金(51105197;51305198)机械结构力学及控制国家重点实验室(南京航空航天大学)自主研究课题 |
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| 摘 要： | 为了研究飞机减摆器中油液压缩性对摆振稳定性的影响,以某型无人机前起落架为研究对象,在建立液压缸压力微分方程的基础上,采用LMS Imagine.Lab AMESim建立飞机减摆器液压模型,利用该模型对减摆器动态阻尼特性进行仿真分析。基于多体动力学理论,采用LMS Virtual.Lab Motion建立前起落架摆振动力学模型。联合上述两种模型进行飞机滑跑虚拟试验,得到不同油液压缩性时飞机摆角的动态响应曲线。结果表明:当油液含气量从0.05%增大到0.50%时,功量图面积减少了44%,增大油液含气量极大地减小了减摆器的阻尼性能,尤其是在小振幅、低频率的工况下;摆振稳定性对油液的压缩性相当敏感,不太大的油液含气量(大于0.19%)足以使摆振不稳定。
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| 关 键 词： | 油液压缩性 前起落架 减摆器 摆振 联合仿真 |
| 收稿时间： | 2014/12/1 0:00:00 |
| 修稿时间： | 2014/12/22 0:00:00 |
Effects of Fluid Compressibility on Landing Gear Shimmy |
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| DU Jin,WEI Xiao-hui,CAI Jia-qi and Wang Yong-quan.Effects of Fluid Compressibility on Landing Gear Shimmy[J].Advances in Aeronautical Science and Engineering,2015,6(2):171-176. |
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| Authors: | DU Jin WEI Xiao-hui CAI Jia-qi and Wang Yong-quan |
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| Institution: | Du Jin;Wei Xiaohui;Cai Jiaqi;Wang Yongquan;Key Laboratory of Fundamental Science for National Defense-advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics and Astronautics;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics; |
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| Abstract: | Researching on the nose landing gear of a certain pilotless aircraft,On the basis of the establishment of the hydraulic cylinder pressure differential equations,shimmy damper hydraulic model has been build. ThroughStheSsimulationSanalysisSofShydraulicSmodels,StheSareaSofSpowerSdiagramSdecreasesSbyS44%SwhenStheSoilSgasScontentSincreasesSfromS0.05%StoS0.5%.STheSco-simulationSofSkineticSmodelSandShydraulicSmodel,SbasedSonSLMSSVirtual.LabSMotionSandSAMESimSrespectively,ScompareStheSdynamicSresponsesSofSaircraftSyawSangleSinSdifferentSoilScompressibility. WithSdifferentSworkingSconditionsSofStheSshimmySflightStestSsimulation,StheSresultsSshowSthatStheSshimmySstabilitySisSverySsensitiveStoStheSoilSliquidScompressibility.SOilSgasScontentSwhichSisSnotSsoSlargeS(greaterSthanS0.12%),SisSenoughStoScauseSshimmySinstability. |
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| Keywords: | oilSScompressibility nose landing gear shimmy damper shimmy Sco-simulation |
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