SCIEI學術(shù)論文寫作與發(fā)表攻略 課件 第五章 結(jié)論與致謝撰寫

第五章

結(jié)論與致謝撰寫目錄CONTENTS一結(jié)論二致謝三實例練習學術(shù)論文寫作與發(fā)表攻略結(jié)論是作者對該項研究的高度總結(jié)和討論根據(jù)論文前面內(nèi)容進行科學、客觀提煉闡述解決了什么問題，得到了什么結(jié)果，有什么意義，并指出創(chuàng)新點和應(yīng)用分析該項研究不足，并指出希望以后做什么結(jié)論學術(shù)論文寫作與發(fā)表攻略Wehavereportedresultsfromexperimentsonthecriticalbucklingloadofsphericalelasticshellsunderpressureloading,withanemphasisonhowtheirknockdownfactorsareaffectedbyanengineereddimplelikeimperfection.Wepresentresultsfromanumericalinvestigationof

thelocalizationofdeformationinthinelastomericsphericalshellsloadedbydifferentlyshapedindenters.WehavepresentedsystematicresultsofanFEMnumericalexplorationonthelargedeformationofindentedthinelasticsphericalshells.Althoughtheaboveresultsarepurelynumerical,severalconclusionscanbedrawnfordesignpurposes.總結(jié)部分經(jīng)典例句學術(shù)論文寫作與發(fā)表攻略創(chuàng)新點：Anewapproachispresentedto

analyzethebucklingbehaviorofanorthotropicellipticalcylindricalshellduetotheeffectofradialloadsandrestingonaWinkler-typefoundation.Tothebestofourknowledge,thisisthefirsttimethatexperimentalresultsontheknockdownfactorsofimperfectsphericalshellshavebeenaccuratelypredicted,throughbothfiniteelementmodelingandshelltheorysolutions.Itisalsosurprisingtoseevirtually

nosensitivityofbucklingloadstotheinitialshapeimperfectionsforthecaseoflateralpressure,only.結(jié)論段經(jīng)典例句學術(shù)論文寫作與發(fā)表攻略作用/應(yīng)用/運用/用途：Wehopethatourresultswillinstigatearesurgenceofinterestonthemechanicsofthinsphericalshellsandmotivatefutureexplorationsontheeffectofothertypesofimperfectionsontheirbucklingbehavior.Thisobservationisparticularlyimportantforestimatesofbucklingstrengthatthedesignstagewheretheworstpossiblescenarioisbeingadoptedtobefollowedbytheknockdownfactor(s).Thenewconceptshallbeexpandedtostiffenedshellsanddynamicloading結(jié)論段經(jīng)典例句學術(shù)論文寫作與發(fā)表攻略不足/缺點/缺陷/問題：Theinfluenceofembeddedresidualstresseswasnotpartofthisinvestigation.Both,conesandroundcouponscutformaterialproperties

havenotbeenstressrelieved.Hencetheeffectofresidualstressesremainsunknown.Onespecificdrawbackseemstobeassociatedwith,asyet,lowsuccessinparallelizationofthemethod.Butitneedstobestressedthattheabovescatterisnotunusualforbuckling/collapsetestsonpressurevesselshellcomponents.Somedrawbacksassociatedwiththeoptimalgeometrieshavebeenidentifiedinthepaper.方向段經(jīng)典例句學術(shù)論文寫作與發(fā)表攻略展望：Thelower-boundapproachhasbeenverifiedbyavailableexperimentaldatabutinviewofanumberofmodellingpossibilitiesofFID

itwouldbeinterestingtoseecarefullyconductedexperimentsinordertocheckvalidityoftheFEpredictions.Wehopethatourexploratorynumericallystudywillhelpcatalyzefurthertheoreticaleffortsinthisdirection.Moreover,ourworkhasfocusedonelasticsystemsanditwouldbeinterestingtoperformasimilaranalysisformetallicshellsthatundergoelastic–plasticdeformation.Thisclearlywouldjustifyfurtherexamination.方向段經(jīng)典例句學術(shù)論文寫作與發(fā)表攻略深海球形耐壓殼力學特性研究3結(jié)論（1）強度是厚球殼設(shè)計的主要影響因素。中面應(yīng)力與內(nèi)表面應(yīng)力差值隨著增加而逐漸增大，當增加到0.075時，兩者差值達到最大為10.4%，即使為1/20時，兩者差值也達到了7.1%。建議以內(nèi)表面應(yīng)力為基準設(shè)計和評估深海球形耐壓殼。Zolley公式誤差隨著增加而逐漸增大，當為0.075時，兩者差值達到最大為2.1%，薄殼理論可用于厚球殼穩(wěn)定性初步評估。經(jīng)驗法求解球形耐壓殼浮力系數(shù)偏于保守，其誤差隨著增加而逐漸增大，當達到0.075時，誤差達到10.1%，即使為1/20時，誤差也高達6.8%。（總結(jié)段）建議采用解析法評估深海球形耐壓殼的浮力系數(shù)。（方向段）結(jié)論實例分析學術(shù)論文寫作與發(fā)表攻略（2）綜合考慮計算精度和效率，建議采用網(wǎng)球劃分、4節(jié)點完全積分線性殼單元、單元平均尺寸0.07R,建立球形耐壓殼的殼單元數(shù)值方案。建議采用網(wǎng)球劃分、三維20節(jié)點減縮積分體單元、周向單元平均尺寸0.07R、厚度方向4層單元，建立球形耐壓殼的體單元數(shù)值方案。殼單元數(shù)值方案、薄殼理論方案可用于淺海耐壓殼設(shè)計與評估，體單元數(shù)值方案、厚球殼理論方案可用于深海耐壓殼設(shè)計與評估。（總結(jié)段）建議船級社在進行深海耐壓殼設(shè)計規(guī)范修訂時，采用內(nèi)表面應(yīng)力、厚殼臨界屈曲載荷作為評價指標。（方向段）結(jié)論范文分析學術(shù)論文寫作與發(fā)表攻略Bucklingofsphericalshellssubjectedtoexternalpressure:Acomparisonofexperimentalandtheoreticaldata4.ConclusionsInthepresentwork,theresultsofexperimental,analytical,andnumericalstudyintothebucklingbehaviorsofsphericalshellsarepresented,aswellastheeffectsofconstitutivemodesonthebucklingloadsoftheseshells.（總結(jié)段）Theexperimentalbucklingloadincreasedmonotonicallywithanincreaseintave/rave,whichwasaslittleas15.07%–24.55%oftheelasticbucklingloaddeterminedusingZoelly’sequation.Theexperimentalcollapsedmodesofalltheshellswereidentical;allofthemassumedtheformofalocaldent,whichistypicalofshellsofrevolutionwithapositiveGaussiancurvature.（結(jié)論段）結(jié)論范文分析學術(shù)論文寫作與發(fā)表攻略Geometricallyandmateriallynonlinearbucklinganalyseswereperformedonthesphericalshellsfordeterministicimperfections.Verygoodcorrelationwasobtainedbetweenthenumericalbucklingloadsandtheexperimentalones.Thepathofeachsphericalshellhadanunstablecharacteristictypicalofshellstructures.Alltheshellsbuckledwithinanelastic-plasticrange.Thebucklingandpostbucklingmodesofalltheanalyzedshellsweresimilarandassumedtheformofalocaldent,whichwasinverygoodagreementwiththeexperimentalresults.（結(jié)論段）Theeffectsofconstitutivemodelsonthebucklingofsphericalshellsweredemonstratednumericallyaccordingtothebucklingload.Thefailuresofsphericalshellsvariedgraduallyfromelasticbucklingtoelastic-plasticbucklingasthewallthicknessesincreased.Verygoodagreementwasobtainedamongtheelastic-plastic,elastic-perfectlyplastic,andexperimentalresults.Theelastic-perfectlyplasticassumptionresultedinahighlyaccurateprediction.Theelasticassumptionyieldedafairlylargeincreaseinthemagnitudeofthebucklingloadabovetheelastic-plasticassumptionandexperiment.（結(jié)論段）結(jié)論范文分析學術(shù)論文寫作與發(fā)表攻略Thisworkthereforeindicatesthattherealload-carryingcapacityofasphericalshellcanbeobtainednumericallyfrommeasuredgeometricshapeandaveragewallthickness,aswellasfromtheassumptionofelastic-perfectlyplasticmaterialproperties.Thecurrentapproachappearstobeeffectiveforothershellsofrevolutionwithtypicalmeridionalprofiles,suchascylindricalandconicalshells,aswellasforshellsofrevolutionwithnontypicalmeridionalprofiles,suchasbarreledandegg-shapedshells.（結(jié)論段）However,somelimitationsmeritattention.Althoughthepredictedbucklingloadsandfinalfailuremodeswereverifiedexperimentally,thecriticalbucklingmodeswerenotexaminedthroughtesting.Moreover,themanufacturingprocesscausedsomevarianceinthewallthicknesses,andthatvarianceexertedaneffectonthebucklingofsphericalshells;however,thiseffectwasnotstudied.Theselimitationsrequirefurtherinvestigationinthenearfuture.（方向段）結(jié)論范文分析學術(shù)論文寫作與發(fā)表攻略感謝對該項研究、論文構(gòu)思、撰寫工作提供幫助的個人、項目、單位個人包括對論文提出建設(shè)性意見的同事、專家或?qū)徃迦隧椖堪ㄆ髽I(yè)、政府、實驗室項目等課題單位包括為該項研究提供資助、試驗場地、參考資料等組織機構(gòu)致謝學術(shù)論文寫作與發(fā)表攻略第一人稱寫法：Wethank

MartinBrinkmannfordiscussionsandbringingRef.[26]toourattention.WeacknowledgefinancialsupportfromtheMercatorResearchCenterRuhr(MERCUR)WearegratefultoProfessorGustavoGuinea,whoprovideduswithpreliminarydataontheresponseofarterialtissuefrompatientsaffectedbyMarfan’ssyndrome.TheauthorsacknowledgesupportfromtheMinisteriodeCienciaeInnovacióninSpainundertheProjectreferenceDPI2008-03769duringthepreparationofthiswork.致謝經(jīng)典例句學術(shù)論文寫作與發(fā)表攻略其他人稱寫法：Theauthorwouldliketoexpresshisthanksandappreciationtotheanonymousreviewerswhosesubstantialandconstructivecommentsignificantlyimprovedthepaper

（感謝審稿人）TheworkhasbeensupportedbyMinistryofScienceandHigherEducationGrantno.NN501038535TheauthorwishestoacknowledgeandthankMessrsS.Pennington,L.RuongandP.Smithfortheirinputsintothispaper.TheauthorwishestoacknowledgehelphehasreceivedfromMr.P.Wanginobtainingsomeoftheexperimentaldata.致謝經(jīng)典例句學術(shù)論文寫作與發(fā)表攻略硬土-軟土插樁過程數(shù)值分析及驗證結(jié)論基于HossainMS土工離心模型試驗，采用CEL法建立了自升式平臺插樁過程的數(shù)值模型。利用HossainMS的試驗結(jié)果對數(shù)值模型進行了驗證，結(jié)果表明：數(shù)值解與試驗值吻合程度較好，驗證了數(shù)值模型的可靠性。采用數(shù)值模型計算了插樁過程中土壤速度矢量圖及變形圖，以分析土壤流動特性。結(jié)果表明：插樁過程中發(fā)生了硬土表面局部隆起、硬土-軟土界面變形、空腔形成、土壤回流、局部土壤流動等現(xiàn)象。為了分析土壤特性參數(shù)變化對插樁過程的影響，采用數(shù)值模型模擬了硬土、軟土參數(shù)改變后土壤的最終變形情況。結(jié)果表明：硬土、軟土的強度比越小，樁靴下方硬土塊體積越小，樁靴上方硬土分布越連續(xù)、均勻，空腔深度越大；土壤重度越大，樁靴上方硬土回流量越大，空腔深度越小，而土壤重度對樁靴下方硬土塊形狀和體積幾乎沒有影響。實例練習學術(shù)論文寫作與發(fā)表攻略采用數(shù)值模型計算了插樁深度與插樁阻力的關(guān)系。結(jié)果表明：硬土、軟土的強度比越大、有效重度比越小，發(fā)生“刺穿”的可能性越高。采用數(shù)值模型計算了樁靴底部壓力分布。結(jié)果表明：樁靴底部壓力由內(nèi)向外先增大、后減小、再增大，證明《海上移動平臺入級與建造規(guī)范》中關(guān)于樁靴底部壓力的線性分布假設(shè)與實際情況不符。實例練習學術(shù)論文寫作與發(fā)表攻略InvestigationonEgg-shapedPressureHulls4.ConclusionsItisuntilnowthatthesphericalpressurehullisthemostextensivelyusedstructureforthedeepmannedsubmersible.However,lowbucklingresistance,difficultinteriorarrangementandpoorhydrodynamicsarefoundwiththistypeofpressurehull.Inthisstudy,investigationsonegg-shapedpressurehullsareperformedtoimprovetheseproblemspossessedbythesphericalpressurehull.Asshownintheaboveresearch,shapeandsizeofthegeometryimperfectionshaveabigeffectonthebucklingloadofpressurehulls.Forshe