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1、第10卷第1期交通运输工程学报Vol110No112010年2月JournalofTrafficandTransportationEngineeringFeb.2010文章编号:167121637(2010)0120050206半挂汽车列车弯道行驶制动稳定性1,213121宋年秀,苏建,王东杰,刘宏飞,梁成江,李世武(11吉林大学交通学院,吉林长春130025;21青岛理工大学汽车与交通学院,山东青岛266520;31北京理工大学机械与车辆工程学院,北京100081)摘要:为了研究弯道行驶中制动工况对半挂汽车列车稳定性的影响,运用动力学理
2、论与虚拟样机仿真软件ADAMS,建立了具有21自由度的半挂汽车列车整车模型,分析了在弯道行驶极限工况下,半挂汽车列车折叠角、侧向加速度、横摆角速度、车速、轮速、轮胎侧偏角随时间的变化关系。通过整车系统的稳态转向试验与阶跃试验,验证了模型具有较好的仿真精度。仿真结果表明:转向后-13s实施制动,在3s的时间内,牵引车侧向加速度变为0,横摆角速度达到极值33rad·s后迅速-2减小,而半挂车侧向加速度达到极值4m·s,横摆角速度逐渐减小为0;在制动过程中,牵引车后轴先抱死拖滑,由此引起半挂汽车列车发生折叠现象,从而导致弯道行驶制动稳定性降低。
3、关键词:汽车工程;半挂汽车列车;弯路行驶;制动稳定性;虚拟仿真中图分类号:U469.5文献标志码:ABrakingstabilityoftractor2semitrailerrunningoncurve1,213121SONGNian2xiu,SUJian,WANGDong2jie,LIUHong2fei,LIANGCheng2jiang,LIShi2wu(1.SchoolofTraffic,JilinUniversity,Changchun130025,Jilin,China;2.SchoolofAutomobileandTraffic
4、Engineering,QingdaoTechnologicalUniversity,Qingdao266520,Shangdong,China;3.SchoolofMechanicalandVehicularEngineering,BeijingInstituteofTechnology,Beijing100081,China)Abstract:Inordertostudytheeffectofbrakingconditiononthestabilityoftractor2semitrailerrunningoncurve,awhole
5、vehiclemodeloftractor2semitrailerwith21degreesoffreedomwasestablishedbyusingdynamicstheoryandvirtualprototypesimulationsoftwareADAMS.Thechangerelationsoffoldingangle,lateralacceleration,yawanglevelocity,vehiclespeed,wheelspeedandtireside2slipanglewithtimewereanalyzedwhent
6、ractor2semitrailerranoncurveundertheultimatecondition.Throughthewholevehicletestofstablesteeringandstep,thesimulationaccuracyofthemodelwasverified.Simulationresultshowsthatwhentractor2semitrailerbrakesafter3softurning,in3s,tractorpslateralaccelerationbecomes0,yawanglevelo
7、cityreaches-1extremevalue33rad·s,thendecreasesrapidly.Whiletrailerpslateralaccelerationreaches-2extremevalue4m·s,andyawanglevelocitygraduallydecreasesto0.Inthebrakingprocessoncurve,tractorpsrearaxlefirstlocksandslips,thusthefoldingphenomenonoftractor2semitrailerprobablyha
8、ppens,whichleadstothereductionofbrakingstability.1tab,14figs,11refs.Keywords:automobileengineeri
