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时间:2020-06-01
《高速列车制动盘泵风效应分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第14卷第2期交通运输工程学报Vo1.14NO.22O14年4月JournalofTrafficandTransportationEngineeringApr.2Ol4文章编号:16711637(2014)02—003407高速列车制动盘泵风效应分析左建勇,罗卓军(同济大学铁道与城市轨道交通研究院,上海201804)摘要:为研究列车运行过程中制动盘泵风特性,建立了列车、轨道、制动盘及其附近空气流场的有限元模型,采用动网格流固耦舍仿真方法,计算了制动盘泵风功耗,分析了制动盘泵风对牵引功率的影响。以运行速度为300km·h的4动4
2、拖8辆编组列车为例,进行了制动盘泵风效应的仿真与对比分析。分析结果表明:制动盘泵风功耗与列车运行速度成正比,每辆车泵风功耗为54~70kW,泵风阻力矩与制动盘安装位置无关,主要受制动盘转动速度影响;随列车运行速度的提高,制动盘泵风功耗占比略有下降,当列车运行速度由200km·h提高为400km·h时,制动盘泵风功耗占比由12降低为8;封堵制动盘进风口可以降低泵风功耗的影响,当列车运行速度为300km·h时,封堵制动盘进风口后,列车制动盘泵风功耗由原来的489kW降低为68kW,泵风功耗占基本阻力功耗的比例由原来的9.0V0降低
3、为1.3,改善效果显著。可见,从泵风功耗角度探索优化高速列车制动盘散热筋结构具有较大的现实意义。关键词:高速列车;制动盘;泵风效应;泵风功耗;空气流场;数值仿真中图分类号:U270.1文献标志码:AAir-pumpingeffectanalysisforbrakediscofhigh—speedtrainZUOJian—yong,LUOZhuo—jun(InstituteofRailwayandUrbanMassTransit,TongjiUniversity,Shanghai201804,China)Abstract:Tos
4、tudytheair—pumpingcharacteristicsofbrakediscduringtrainoperation。thefiniteelementmodelsincludingvehicle,rail,brakediscandrelatedairflowfieldwereputforward.Theair—pumpingpowerconsumptionofbrakediscwascalculated,anditseffectontractionpowerwasanalyzedbyusingdynamicgrid
5、andflow—solidconjugationsimulationmethod.Takinga8一unithigh—speedtraincomposedof4motorcarsand4trailersrunningat300km·h一asanexample,theair—pumpingeffectofbrakediscwassimulatedandcompared.Simulationresultindicatesthattheair—pumpingpowerconsumptionofbrakediscisinproport
6、iontotrainrunningspeed.Theair—pumpingpowerconsumptionofeachcarisabout54—70kW.Theair—pumpingtorque,independentofinstallationpositionofbrakedisc,ismainlyinfluencedbytherotationalvelocityofbrakedisc.Theproportionofair—pumpingpowerconsumptionofbrakediscreduceswiththeinc
7、reaseoftrainrunningvelocity。Whentrainrunningvelocityincreasesfrom200km·h一to400km·h。。,theproportionofair—pumpingpowerconsumptionreducesfrom12to8V0.Blockingairfromtheinletsofbrakediscsishelpfultoreducetheinfluenceofair—pumpingpowerconsumption.Takingthetrainrunningat30
8、0km·h_。asanexample,whentheinletsofbrakediscsareblocked。theair—pumpingpowerconsumptionofbrakediscreducesfrom489kWto收稿日期:201312-29基金项目:国家自然科
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