《高铁车辆横向振动耦合机制及其减振技术对策》.pdf

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1、振动与冲击第34卷第3期JOURNALOFVIBRATIONANDSHOCKVo1．34N0．32015高铁车辆横向振动耦合机制及其减振技术对策朴明伟，李明星，赵强，兆文忠(大连交通大学机械工程学院，大连116028)摘要：结合欧系车辆转向架技术创新特点，提出一种基于刚柔耦合仿真技术的车下质量橡胶吊挂优化设计方法。横向振动耦合机制是指以二系横向悬挂构成车体对走行部接口传递媒介的横向高频振动耦合机制，且具有抗蛇行高频阻抗、车体摇头大阻尼和“无纵梁无骨架”铝合金车体3大特殊性。因而整装车体下部1阶横向弯曲模态振动将对车体技术服役寿命30年造成

2、十分严重的负面影响。对于车下质量橡胶吊挂来讲，比例阻尼是抑制车下质量横向振动的积极因素之一，而对中部地板横向加速度则具有极值特征，即比例阻尼取0．5％，其全频域(RMS)，最小。也应当注意到上述减振技术的局限性，即在走行部非常工况下，较大的车下质量存在横向耦合振动的可能性，进而造成自重楔紧失效。关键词：高铁车辆；横向振动耦合机制；车下质量；橡胶吊挂；比例阻尼；刚柔耦合仿真中图分类号：U266．4文献标志码：ADOI：10．13465／j．cnki．iVS．2015．03．014Lateralvibrationcouplingmechani

3、smofhigh-speedrollingstocksanddampingtechnicalcountermeasurePIAO一wei，LIMing—xing，ZHAOQiang，ZHAOWen-zhong(MechanicalEngineeringSchool，DalianJiaotongUniversity，Dalian116028，China)Abstract：Accordingtotheinnovativetechniquefeaturesofhigh-speedbogiesforEuropeanvehicles，anoptim

4、izeddesignmethodologyforrubbersuspensionsofunder-floormasseswasproposedbasedonrigid·-flexcouplingsimulationtechniques．Lateralvibrationcouplingmechanismisthecouplingmechanismoflateralhigh—frequencyvibrationscausedbythelateralsecondarysuspensionsforthecoachbodyrelativetorun

5、ninggears，withthreeparticularfeaturesofanti—huntinghigh—frequencyimpedance，higherdampingofcoachyawandaluminum—alloycoachwithoutlongeronsandskeletons．Themodalvibrationsof1storderlateralbendingmodeofthecoachhadverynegativeimpactsonthetechnicalspecificationsof30-yearlife—tim

6、e．Fortherubbersuspensionsofunder—floormasses，itsproportionaldampingisoneofactivefactorsinsuppressingthelateralvibrationsofunder—floormasses．Butthereisanoptimalvalueforthelateralaccelerationofthemiddlefloor，i．e．，theminimumvalueof(RMS)3inafullfrequency—bandcouldbeachievedwh

7、entheproportionaldampingis0．5．Meanwhile，thelimitationoftheabovedampingtechniqueshouldbepaidmuchattentionto，i．e．，itispossiblethatthelateralcouplingvibrationsofunder—floormassesmayoccurunderabnormalconditionsofrunninggears．Keywords：high-speedrollingstocks；lateralvibrationco

8、uplingmechanism；under-floormasses；rubbersuspensions；proportionaldamping；rigid—flexcouplingsimula