简介：免费表面流动产生了由在强迫的运动成双柱体在免费表面下面沉没了基于边界元素方法被学习。二个相对地点，也就是水平、垂直，为成双的柱体被检验。在两个盒子中，成双的柱体从休息正在开始并且最终通过一个加速的过程以一样的经常的速度移动。假设液体是inviscid并且不可压缩并且无旋的流动，不可分的Laplace方程能基于边界元素方法是discretized。充分非线性的边界条件在未知免费表面和动人的身体表面上满足。免费表面被一种Lagrangian技术跟踪。Regriding并且重新协调被使用，它对数字结果的质量关键。单个圆形的柱体和椭圆的柱体被线性方法和充分非线性的方法为精确性检查计算然后充分非线性的方法分别地在成双的柱体盒子上被进行。产生波浪举起和结果的力量被分析象水深度一样讨论在二柱体之间的差距的影响。当动人的柱体接近对方时，不管分发的类型，这被发现当动人的柱体接近对方时，他们在方向与大绝对值承受水动力学力量打手势。随差距的增加变化的力量的趋势能清楚地从数字分析被看见。当当他们接近对方时，水平地分布式的成双的柱体是相反的时，垂直地分布式的成双的柱体似乎与对方一起吸引。

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。