2023年全國(guó)碩士研究生考試考研英語(yǔ)一試題真題（含答案詳解+作文范文）_第1頁(yè)
已閱讀1頁(yè)，還剩9頁(yè)未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說(shuō)明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請(qǐng)進(jìn)行舉報(bào)或認(rèn)領(lǐng)

文檔簡(jiǎn)介

1、外文文獻(xiàn)及翻譯外文文獻(xiàn)及翻譯SteelCdBeltSpliceConstructionModernizingtheirspecificationsImprovingTheirEconomicsL.K.NdellUSASummaryBeltconveyersconstructedwithsteelcdtensilemembersaregenerallydesignedwithabreakingstrengthratingthatexcee

2、dstheoperatingloadby6.7times.ThismultipleratioisoftenreferredtoastheSafetyFact(SF).This6.7:1SFhasbeenchosenbybeltmanufacturersindustrialstardstorepresentthecriterionfstrengthwhichengineersmustfollowduringdesigndevelopmen

3、tThispaperwilldemonstratethattheirapproachdevelopedover30yearsagoisnotpracticaltoday.Itresultsinasignificanteconomicpenaltytotheowner.BeltspliceconstructionmaterialsmodemanalyticprocedurescanprovidesafeoperationusinganSF

4、ratiobelow6:1atbreakingstrengthratingsfromST1000NmmtoaboveST6000Nmm.Splicefatiguefailurecriteriastresslimitsofthecerubbercablearediscussed.Thismethodisusedtoresolvemodernsteelcdbeltsplicedesign.Theeconomicbenefitscanbesu

5、bstantialfnewreplacementbelt.1.IntroductionThispaperisanextensionoftheauths19911993papers[1][2]respectively.Furtherresearchisbeingconductedontheviscoelasticpowerequationthehyperelasticsplicemodelingmethodsfatiguemechanic

6、sofsteelcablerubber.Thesecriteriaothernotableinfluencesprovidethenecessaryrefinementstoguidethechangesinbeltsplicespecificationsconstructionmethods.Thesetoolscansupptthemineownersinterestinrankingtheperfmanceofbeltsrubbe

7、rpropertiesfitsdempower(viscoelasticity)beltwearresistance(toughness)truetempalcapacity(splicedesignbeltconstruction).Allbeltsarenotcreatedequal.Fieldinvestigationtogetherwithmoderntheyendlabatystudiesconfirm!firstlythat

8、theempiricalpowerequation[3][4]doesnotprovideareasonablelevelofaccuracy[5]secondlythebeltsstrengthcannotbedeterminedfromelementarytestingofcablebreakingstrengthrubberHblockstaticpulloutfces[2].Thesegreyareasofunderstingn

9、eedameaccurateapproachtofulfillthedemsplacedontheengineerftodayslargermecostlyconveyingsystems.a.Case1isdesignedwithconventionalfrictionfactsconventionalpublishedsplicemethods.b.Case2isdesignedwithaslightreductioninconve

10、ntionalmotionfactsnotedfsuperiinstallationalignmentmaintenanceChannarDesign.c.Case3isdesignedtonewpowerequationmethodsabeltspecificationconstructionfmulationcontrolledbythesplicingsystemChannarothermeasurementssince1989v

11、erifythepotential.3.ManufacturersRecommendationfSafetyFactsinSteelCdBeltsSomeoftheleadingsteelcdbeltmanufacturerswerepolledftheirassessmentonsupptofthereductionintheSF.Theircommentsaresummarizedhere:3.1BridgestoneCpation

12、BridgestoneCpationcompletedadetailedinvestigationoftheBeltSafetyFactin1982.Afiniteelementmodelwasdevelopedtostudythenonlinearrubberstrainfatiguebehavi.Extensivetestingwasmadeonthefatigueperfmanceofthebeltssteelcds.Theses

13、tudieswereproducedinresponsetoaninquiryfanST7000NmmclassbeltOurinvestigationshowedthatthisclassofbeltcouldbeconstructedwithaBeltSafetyFactof5.0:1insteadofthecommonlyused70:1.BridgestonehasinservicelowSafetyFactbeltwhichh

14、asbeeninoperationfmethan10years.Regularmonitingofitsperfmancehasprovidedunderstingthatthepracticeissound.WecontinuetodaythroughfurtherresearchtestingtoadvocateimprovedSafetyFactstokeeppacewithadvancementsbeingdevelopedin

15、materialsengineeringmethodsDynamicfatiguetestingofthebeltitssplicepatternasdefinedbyDIN22110arealsoanecessitywhenrecommendingnewclassesofbeltconstruction[6].acoursewemustbearinmindanyreductioninthesocalledSafetyFactmusta

16、lsobeaccomplishedwithfullunderstingofallengineeringissuesdesignstardswhichmustapply.TheSafetyFactisdependentonmanyelementsoutsidethecontrolofthemanufacturer.Whentheownerwishesasignificantcostsavingsiswillingtoparticipate

17、inproperoperationmaintenancethengreaterbenefitscanbeachieved.ASafetyFactcloserto4.0:1maybeoffered.Theconveybeltseconomicscanhavealargeimpactontheviabilityofminingprojects.TotheseendsBridgestoneisprovidingitsfullsupptrede

溫馨提示

  • 1. 本站所有資源如無(wú)特殊說(shuō)明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請(qǐng)下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請(qǐng)聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁(yè)內(nèi)容里面會(huì)有圖紙預(yù)覽，若沒(méi)有圖紙預(yù)覽就沒(méi)有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫(kù)僅提供信息存儲(chǔ)空間，僅對(duì)用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對(duì)用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對(duì)任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請(qǐng)與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時(shí)也不承擔(dān)用戶因使用這些下載資源對(duì)自己和他人造成任何形式的傷害或損失。

最新文檔

評(píng)論

0/150

提交評(píng)論