浅析抗俯仰液压互联悬架三轴重型货车动态特性

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1、Vo1．1NO．4第1卷第4期汽车工程学报Sept．201120t1年9月ChineseJournalofAutomotiveEngineering抗俯仰液压互联悬架三轴重型货车动态特性丁飞，张农，韩旭湖南大学汽车车身先进设计制造国家重点实验室，湖南，长沙4100822．悉尼科技大学电机、机械与机械电子学院，悉尼，澳大利亚2007)建立青耦合机械系统和液压系统的动力茎学方程，该特征方程以机械系统的位移和运厦以及L械与敝座衲。一。开。匝／J作为状态矢量。对比分析HIs对车体恢复力和力矩及车体振动固有频率的影响。结果表明，液压互联悬架HIS为车体提供较大的抗俯仰力矩。自由振动分析表明，

2、HIS改变了车体垂向和俯仰振荡中心位置，且增加了车。体釜俯登仰模态对应的固有频率，同时车体垂向跳动模态对应的固有频率几乎保持不变。关键词：液压互联悬架(HIS)；舒适性；抗俯仰悬架；三轴货车文献标志码：ADOI：10．3969／j．issn．2095—1469．2011·04022中图分类号：U463．33+5CharacteristicsofaTri．axleHeavyTruckFittedDynamicHydraulicallyAnti．pithInterconnectedSuspensionDingFei2ZhangNong2，HanXu(．statekeyLaborator

3、yofAdvancedDesignandMmmfhcturingforVehicleBodyHunanUniversity,Changsha,Hunma41⋯T2．SchoolofElectrical，MechanicalandMechatronicSystems．，Universityotecm‘小g34syd“““⋯Abstract：Thispaperbrief1ypresentsthederivationoftheequations。fm。tionof"tri-axle眦kdwnDitchresistanthvdrau1icallyinterconnectedsuspensi

4、on(HIS)system·BasedonfreebodYdagramandfluidtransferimpedancematrixmethod，thecharacteristicequationsofthismechanicallyandhydraullCallycoupledsvstemarederivedwithastatevectorincludingthedisplacementsandvelocitiesofm。hanlYtmandtheDressureatthemechanical—hydraulicboundarysection．Thecomparisonanaly

5、sisofthesprungmassresponsest0roadinputsiscarriedoutbetweenthetruckswithconventionalsuspensionandhydraulcallyntercor¨1ectedsusDensionsvstem．TheobtainedresultsindicatethattheHISsystemcanprovidegreatPtchrestonngmomentofsprungmass．AndthefreedecayvibrationanalysisrevealsthattheHISsystemchangesthebo

6、unceandptcnoscillationcenterofsprungmass，andtheobtainednaturalfrequenciesofbounceandPtchmodesofsprungmassmustratethatthepitchstifnessisincreasedwhilethebouncestifness1Sslightlysoftened．KevwOrds：HIS；ridecomfort；pitchresistantspecificsuspension；tri—axletruckReceiveddate：2011—9-11F。undati。nitem：K

7、eyProject。fChineseNationalProgramsforFundamenta1ResearchandDevel。pment(2010CB832705)；Nti。mls。i。“。。F“dofChinaforDistinguishedYoungScholars(10725208)416汽车工程学报第1卷Thebounceandpitchvibrationbehaviorofforpassengercarsthroughprovidingadditiona