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1、第48卷第4期2016年8月南京航空航天大學JournalofNanjingUniversityofAeronauticsDOI:10.16356/j.1005—2615.2016.04.024報stronauticsV01.48No.4Aug.2016基于多自由度飛機模型的機場道面平整度評價方法程國勇郭穩(wěn)厚(中國民航大學機場學院,天津,300300)摘要:從三自由度飛機模型出發(fā),提出了新的機場道面平整度評價理論,以不同平整度等級的3條測線的道面高程作為輸入,在Matlab/Simulink環(huán)境中對飛機的三自由度振動方程進行求解
2、,得到飛機機身的3個振動響應(yīng)量:縱向俯仰角叭橫向滾轉(zhuǎn)角0及質(zhì)心處豎向位移。在此基礎(chǔ)上計算出道面整機平整度指數(shù)(Fullaircraftroughnessindex,F(xiàn)ARI)沿跑道縱向的分布曲線;同時計算出相同道面的國際平整度指數(shù)(Internationalrough—nessindex,IRI)。分別將FARI,IRI與在相應(yīng)道面上滑行的飛機加權(quán)加速度均方根值進行了相關(guān)性分析,相關(guān)系數(shù)分別為0.9806和0.8869。結(jié)果表明整機平整度指數(shù)FARI更能夠客觀反應(yīng)飛機所有機輪覆蓋范圍內(nèi)道面起伏情況對飛機滑行過程中顛簸量的影響效果
3、,更適合于機場道面平整度的評價。關(guān)鍵詞:道路工程;整機平整度指數(shù);軟件模擬;三自由度飛機模型;Simulink仿真中圖分類號:U416文獻標志碼:A文章編號:1005—2615(2016)04—0606—09AirportPavementRoughnessEvaluationBasedonThree-Degree-of-FreedomAircraftModelChengGuoyong,GuoWenhou(AirportCollege,CivilAviationUniversityofChina,Tianjin,300300,Ch
4、ina)Abstract:Basedonthethree—degree—of—freedomaircraftmodel,anewairportpavementroughnessevalua—tiontheoryisproposed.Takingthreelineswithdifferentroughnessgradesasinput,thethree—degree—of-freedomvibrationequationoftheaircraftmodelissolvedusingMatlab/Simulink,throughwh
5、ichthethreevibrationresponsesareobtained,namely,pitchinganglep,transverserollangle0andverticaldis—placementatthecenterofmass.Byutilizingthreevibrationresponseparameters,thedistributionoffullaircraftroughnessindex(FARI)alongpavementlongitudinaldirectionisacquired.Simu
6、ltaneously,theinternationalroughnessindex(IRI)parameteralongthesamelineiscalculated.Thentherelevancebe—tweenFARIandtheaircraftrootmeansquarevalueofweightedacceleration,andtherelevancebetweenIRIandtheaircraftrootmeansquarevalueofweightedaccelerationareanalyzed,respect
7、ively.Thecor—respondingcorrelationcoefficientsare0.9806and0.8869.TheresultsshowthatFARIisamoreobjec—tiveparametertodescribetheaircraftbumpyeffectinthetaxiingprocessbecauseofpavementfluctua—tionintherangeofallaircraftwheelcovering.Therefore,F(xiàn)ARIismoresuitableforairpor
8、tpavementroughnessevaluation.Keywords:roadengineering;fullaircraftroughnessindex;softwaresimulation;three—degree—of-free—domaircraf