简介：Inthispaper,addedresistancesactingonahullofnonballastwatership（NBS）inhighwavesisdiscussed.ThenonballastwatershipsweredevelopedatthelaboratoryoftheauthorsatOsakaPrefectureUniversity,Japan.Inthepresentpaper,theperformancesofthreekindsofbowshapesdevelopedfortheNBSweretheoreticallyandexperimentallyinvestigatedtofindthebestoneinhighwaves.Inpreviouspapers,anoptimumbowshapefortheNBSwasdevelopedincalmwaterandinmoderatedwaves.Fora2mmodelforexperimentsandcomputations,thewaveheightis0.02m.Thismeansthatthewaveheightis15%ofthedraftoftheshipinfullloadconditions.Inthispaper,addedresistancesinhighwavesupto0.07mfora2mmodelor53%ofthefullloaddraftareinvestigated.Insuchhighwaveslinearwavetheorieswhichhavebeenusedinthedesignstageofashipforalongtimemaynotworkwellanymore,andexperimentsaretheonlyeffectivetooltopredicttheaddedresistanceinhighwaves.Withthecomputationsforwaves,theshipisinafullycapturedconditionbecauseshorterwaves,λ/Lpp〈0.6,areassumed.

简介：Usingtheairplasmaignitiontechnique,physicochemicalprocessofburningcanbeaccelerated;concentrationlimitofretrofiresbothcanbeextended;reliabilityofretrofiresandstabilityofburningcanbeimproved.Inthispaper,usinginternalequivalentheatareainplaceofelectricarethatcreatedOhmheat,theflowfieldsofthermodynamicequilibriumchemistrycon-gealmentandchemistrynon-equilibriumintheplasmageneratorweresimulated.Theinfluencesoftheinletprerotationangleofair,theinlettotalpressureofairandtheairflowcompressionangleofspraynozzleonthetemperatureonthesurfaceofelec-

简介：Anexperimentalstudyandcomputersimulationonnon-equilibriumgrain-boundarysegregationkineticsandthecriticaltimeforphosphorusin12Cr1MoVsteel(whichisusedinsteampipelineofships)areputforwardinthispaper.Thesegregationlevelofphosphoruswithsolutiontemperature1050℃attheisothermalholdingtemperatureof540℃,havebeenmeasuredatgrain-boundaries.Anon-equilibriumgrain-boundarysegregationkineticscurveofphosphorusisgiven.Thecriticaltimeforphosphorusnon-equilibriumgrain-boundarysegregationisabout500hat540℃fortheexperimentalsteel.Whentheholdingtimeislongerthan1500h,non-equilibriumsegregationdisappearsandthelevelofsegregationreachesfullequilibrium.Thesimulationusingthekineticequationsofnon-equilibriumgrain-boundarysegregationisingoodaccordancewiththeexperimentalobservationforphosphorusinsteel12Cr1MoV.Thenon-equilibriumgrain-boundarysegregationkineticmodelisthereforeproved.

简介：这份报纸建议有限元素为合成非管状的联合结构的疲劳评估简化了疲劳分析方法一近海使遭到挥动负担的夹克衫。裙子堆积袖子近海夹克衫，在服务，作为非管状的联合结构的一个例子被拿。囊软件为夹克衫平台被用于多方向性的波浪负担的全球分析，并且ALGOR软件被用来造一个有限元素模型，执行有限元素分析，获得压力的过程以后的压力结果变化，并且执行疲劳评估。分析结果显示极端压力范围在许可的压力范围以内并且满足DNV代码的要求。那意味着简化疲劳分析方法是有效的并且能为非管状的联合结构在疲劳设计被使用一近海夹克衫。