12 : 135 passengercar maysideslip.inadditionintheriskevaluationtherequirementsofadhesion coeficientandlateralaccelerationaresatisfied. Keywords:trafic

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1 ChinaJournalofHighwayandTransport Vol.28 No.12 Dec.2015 : (2015) ( ; ) : CARSIM MATLAB : ; ; ; : ; ; ; ; ;CARSIM :U491.2 :A SideslipRiskSimulationAnalysisofPassengerCarBraking BehavioronExpresswayCurvedSections ZHANGChi 12 MENG Liang 2 WANGShuang-jie 1 CHENJian-bing 1 SHAO Dong-jian 2 (1.CCCCFirstHighwayConsultantsCo.LtdXi an710075shaanxichina;2.keylaboratoryofhighway EngineeringinSpecialRegionMinistryofEducationChang anuniversityxi an710064shaanxichina) Abstract:Inordertoanalyzetherisk ofpassengercar movingoncurvedsectionsunderthe driver sbrakingbehaviortakingrainfalover-speedingandroadalignmentsyntheticalyinto considerationthedynamicsimulationmodelofvehiclewasestablishedusingcarsimsoftware whichadoptedthecriticaladhesioncoeficientandlateralaccelerationastheevaluationindexesof vehicle moving risk.the significance ofeach factor was analyzed based on thetheory of mathematicalstatisticsthentheriskevaluation modelaboutpassengercar movingoncurved sectionswasestablishedusing MATLABsoftware.Theresultsshowthatspeedandradiusof horizontalcurve havesignificantefects ontherisk ofdrivingwhilethe braking efectis moderateandthesuper-elevationhasfewefect.whenbrakingismoderatedespiteofpoorroad alignmentfastspeedandbadweatherconditionspassengercarwilnotsideslip.whenbraking isheavyandoverspeedingno matertheroadalignmentandthe weatheraregoodorbad : : (2014BAG05B01); ( ); ( ) ( ); (2013G CHD2011JC ) : (1981-) zhangchi@chd.edu.cn

2 12 : 135 passengercar maysideslip.inadditionintheriskevaluationtherequirementsofadhesion coeficientandlateralaccelerationaresatisfied. Keywords:traficengineering;sideslip;riskanalysis;brakingbehavior;horizontalcurvesec- tion;carsimsimulation v R % 16.3% [1] Andrey [2] 70%; %; [3] ; [9] : ; ; [10] [4-7] 1.2 [8]

3 CARSIM 2.1 [11] - - CARSIM a 4 m s -1 ; ; [12] ( ) CARSIM AdditionalData 3D [Centerline Geometry:Horizontal (X-Y) Table] (1) ; (CenterlineElevation:Z vss) μ ( (z) z)=max( FYi F Zi (z) ) (1) : μ (z) ; F Zi (z) : ; (Of-centerElevation:dZS & LS) ;F Yi (z) i= (CARSIM) Thomas LISP CARSIM :Dupuy [13] ( CARSIM 3D 1) [15-16] 0.75 ; [14] CARSIM 2.3 CARSIM : ; 5 2

12 : 137 Tab.1 1 AdhesionCoeficientsUnderDiferent RoadConditions 1.00 Tab.2 0.75 0.70 0.50 0.40 0.30 0.

4 12 : 137 Tab.1 1 AdhesionCoeficientsUnderDiferent RoadConditions 1.00 Tab VehicleParametersandSystematicParameters /kg 1530 /mm 540 /mm 4350 /mm 1795 /mm 1550 /mm 1481 /mm 2776 X /(kg m 2 ) 708 Y /(kg m 2 ) 4520 Z /(kg m 2 ) 4607 /(N m MPa -1 ) 800 /(N m MPa -1 ) 200 ABS 0.2 ABS /(km h -1 ) 7.5 /( ) 10 /( ) 3 /mm 8 3 ; [19] 1 1s 23 : 0~50m (JTD D ) [17] [18] μ a 0;100~225 m μ a ;225~250m N R v e 3 μ a ;250~475m 1 Fig.1 SceneofNormalMovingandSideslip 3 Tab.3 SimulationStrategiesConsideringDiferent RoadParameters N/N ( ) ( ) R/m v/ (km h -1 ) e /% ( ) ( ) μ a 0~ 100m 100~225m 225~ 475m 475~600 m 600~700m 25 m 0.5s 1 s μ a ;50~100 m μ a ;475~600m

5 Fig EfectsofDiferentRoadParametersonPavement CriticalAdhesionCoeficient 3.2 μ a ;600~700m μ a N 0 34 : m μ a ; km h -1 2% μ a ; μ a 4% 6% 8% ; μ a μ a 4 Fig.3 EfectsofDiferentRoadParameterson LateralAcceleration 4 L 16 (4 5 )

6 12 : μ 5 a 4 : 5 : ( ) ; 3 F F Tab.4 4 ( ) ; F F μ ResultsofDeviationandVarianceAnalysisBasedonCriticalAdhesionCoeficient N R v e F F F0.1(33)=5.36 F0.1(33)=5.36 F0.1(33)=5.36 F0.1(33)=5.36 Tab.5 5 a ResultsofDeviationandVarianceAnalysisBasedonLateralAcceleration N R v e F F F0.1(33)=5.36 F0.1(33)=5.36 F0.1(33)=5.36 F0.1(33)= ; 4 [21] 4.1 ψ= v l [20] β q r 2 =0.88 (2) : ψ ;l ; β ;q ;r μ a μ a 3 μ a

7 μ a 4.2 μ=f1(rvn) [17] 烌 (3) 烍 a=f2(rvn ) [18] 80km h -1 烎 16 50N( ) 350N( ) MATLAB μ a 12.25m( μ= v N 烌 R r 2 =0.96 烍 a= v2 = N R r 2 =0. 93 烎 l/m e/% N/N : Tab.6 q/(mm min -1 ) (4) (4) ) 250 m( ) 400m( ) 80km h -1 96km h -1 ( 20%) 5% 0 1.5mm min -1 ( ) 6 RiskAnalysisofPasengerCarMovingonCurvedSections R/m (1) v/(km h -1 ) ψ μ a/(m s -2 ) ac/(m s -2 ) (3) 1.5 mm min N 1.5 mm min m 96km h -1 ψ μ 0.388a m s -2 a c 4m s -2 km h -1 ψ μ (2) ; 350 N 96km h m N 0 400m mm min m 1.5 mm min m ψ μ 350N 1.5 mm min m 80 (4) 96km h -1 ψ μ 0.443a

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