crh380bl动车组踏面磨耗规律分析与动力学影响分析

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1、万方数据西南交通大学硕士研究生学位论文第1

2、页外轨车轮轮径较内轨侧车轮轮径越大，脱轨安全性风险越大；过右侧曲线时，无论是左侧轮径大，还是右侧轮径大都会影响列车运行平稳性；在同等大小的轮径差情况下，外轨车轮轮径大于内轨车轮轮径时，列车平稳性较内轨车轮轮径大于外轨车轮轮径要好：无论是正方向轮径差还是反方向轮径差，整车磨耗功率都是随着轮径差变大而逐渐增大，且增长率也逐渐变大；在同等大小的轮径差情况下，外轨车轮轮径大于内轨车轮轮径时，磨耗功率较内轨车轮轮径大于外轨车轮轮径要小。过右曲线时，轮径差等值反向、仅后轮对存在轮径差时的对车辆动力学性能影响较大。

3、踏面磨耗后对整车磨耗功率影响较大，其中踏面锥度越大，脱轨系数越大，脱轨风险越大。关键词：车轮磨耗、相关性分析、状态退化、动力学性能万方数据西南交通大学硕士研究生学位论文第1II页AbstractInAugust，2008，theBeijing-Tianjinhigh—speedlinewasputintooperation，markingtheChineseenteredtheeraofhigh-speedrailway．Wheelwearisthemostcommonphenomenononthehi曲speedmilway，theusest

4、ateofwheelisdirectlyrelatedtotherunningquaiityandoperatingCOStsofhigh-speedtrain．Throughtheresearch，findthatdifferentlinehasagreatinfluenceonthewheelwear．TwoCRH380BLtrainsintheBeijing··ShanghailineandtheShanghai-Hangzhoulineareselectedtostudy．Thestatisticalresultsshowsthatwh

5、eeldiameterofcarlandcarl6wearfasterthanthatofothercars．InShanghai—Hangzhouline，theaverageamountofwheeldiameterwearisO．83mmper1millionkilometersforfirst0-8millionkilometers，andduring7．8-10．8millionkilometers，theaverageamountisO．56mmper1millionkilometers，andduring10．8-12．8mill

6、ionkilometers，theaverageamountofwheelwearis1．74mmper1millionkilometers．InBeijing—Shanghailine，theaverageamountofwheeldiameterweal"ofCRH380BL一6461isO．79rnmper1millionkilometersduringfirst0—100millionkilometers．Thencarryontheanalysisoftreadprofileandparameters．Duringthefirst0—

7、1millionkilometers，wheelprofilewearsseriously．Thewearismainlydistributedinthewheelflangewear,followedbyrollingcircle．Analysisresultsoftreadwearshowthattreadwearappearssignificantseasonalchanges．During0-2millionkilometers，theaverageamountoftreadwearis0．36mmper1millionkilomete

8、rs．During2-5and5-7．5millionkilometers，treadwearrateisverycloseandrelativelystable．Andtheaverageamountoftreadwearis0．30ramper1millionkilometers．During7．5—10millionkilometers，treadwearrateis0．42mmper1millionkilometers．ResultsofQRstatisticaldistributionshowthatduring0-2millionk

9、ilometersQRchangesrapidly,suggestingseriouslyverticalweal"offlange．Theanaly