连续下坡路段汽车行驶特性与制动器制动性能研究

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1、,'i'JIi'IiIiIIi'i'Plllllllllllllll!Ji91lUrlJIIJIll!，-Y1528653分类号：U41；U2X季失海硕士学位论文连续下坡路段汽车行驶特性与制动器制动性能研究导师姓名职称申请学位级别周磊扬少伟教授硕士学科专业名称道路与铁道工程论文提交日期2007年4月12日论文答辩日期2007年4月25日学位授予单位长安大学答辩委员会主席张碧琴教授学位论文评阅人张碧琴教授李晓明高工AbstractAtpresent，withtheimplementationofthena．tionalfreewaynetwork，thefreew

2、ayconstructionhasturnedtothemountainousareas．Largerandlongerlongitudinalgradientorcompositegradienthastobeemployedinthemountainousareas．Butfromhavealreadysetupthefreewaycircumstancetosee，thecontinuousLongandSteepDowngradehasproducedtheseriousinfluencetothetrucksafety．ThedomesticiSalr

3、eadyinitialtoknowthatitendangersthetransportationsafety，andadoptedtheaseriesofsafemeasurethatcorrespondtoeasethebanedegreeofthetrouble．Thepaperaccordingtoactualcircumstanceofthefreewayofthemountainarea。andthetransportationCirculatesthepresentconditioninthecontinuousLongandSteepDowngr

4、ade，basedongreatamountoffielddataandaimedatthepresenttrafficCirculationsituationofthespecificupgrades，statisticswiththemathematics，numberanalysiS，andthetheoriesanalysiScombinetogether，thepaperstudiedtheregularityoffreeflowspeed．First，thepaperanalyzesthevarietyregulationoftheoperating

5、speedofthefreewayLongandSteepDowngradeofthemountainareaandthebrakeofthevehicle．Basedontheregulationofthebraketodrive，wemakedtheon—the—spotexperimentofthebraketemperatureinthefreeway．weselectthecarrieyheavy10tonsoftruckandsupposepicaltruck．Underthecombinationofdifferentaveragevertical

6、slopeandlength，andnderthemostdisadvantageousCircumstance，namelynoassistancetobrake，itkeepthesamespeed，Wemeasurethebraketemperatureofthetypicaltruck．Appliedautomobiledynamicsprinciple，westudythechangingregulationofbraketemperaturewiththevarietyverticalslope，anddrawthefunctioncurveofbr

7、akeinthedifferentslope，lengthandoperatingspeed，andestablishthebraketemperaturemodel．Basedonthefoundationforthesestudies，wesuggestaseriesofvalueofthelengthandslopeinthedownslpoeforfreeway．Basedonthefoundationofstudy，Webuildupthestandardofthesafetyguaranteegrade．Andmakesureeachgradetog

8、uaranteethem