简介：航运咨询公司德路里表示,经历过显著下降后,船舶平均运营成本已连续两年上涨,成本的增加主要归因于保险费的上涨.德路里最新报告显示,2018年46种不同类型和尺寸的船舶日均运营成本上涨了1.1%,超过去年0.7%的增长率.

简介：近日,由宁波市港航管理局定制研发的“宁波甬江渣土码头船舶规范装载管理系统”APP软件正式启用.港航管理局执法人员只需要在手机端打开该APP软件,就可以实时查看或复查辖区内水运码头的工程船舶运行情况：有多少条船当天将离港出海,船舶实际装载情况如何,是否存在超载嫌疑,系统上一目了然.

简介：Stronghydrodynamicinteractionsduringtheside-by-sideoffloadingoperationbetweenfloatingliquefiednaturalgas(FLNG)andliquefiednaturalgascarrier(LNGC)caninducehighrisksofcollision.Theweathervaneeffectofasingle-pointmooringsystemnormallyresultsinthesatisfactoryhydrodynamicperformanceoftheside-by-sideconfigurationinheadseas.Nevertheless,thechangesinwavedirectionsinrealseaconditionscansignificantlyinfluencetherelativemotions.Thisarticlestudiestherelativemotionsoftheside-by-sidesystembyusingthetheoreticalanalysismethodandthenumericalcalculationmethod.Basedonthethree-dimensionalpotentialtheorymodifiedbyartificialdamping-lidmethod,thefrequency-domainhydrodynamiccoefficientscanbeimprovedtocalculatetheretardationfunctionsforthemulti-bodyproblem.Anin-housecodeisthendevelopedtoperformthetime-domainsimulationoftwovessels,throughwhichtherelativemotionsaresubsequentlyobtained.Arangeofobliquewavesarechosenfortheextensivecalculationofrelativemotionsbetweenthetwovessels,whicharefurtheranalyzedintermsofthephaseshiftofmotionresponsesinducedbyspecificresonantwavepatterns.Investigationresultsshowthatwavedirectionshaveasignificantinfluenceontherelativesway,roll,andyawmotions.Underthecircumstancethattheabsolutephaseshiftbetweentherollmotionsoftwovesselsapproaches180°,strongerrelativemotionsareinducedwhenLNGCisontheweatherside.Moreover,thegapwaterresonancesathighfrequenciestendtocausethedangerousopposedoscillationoftwovesselsintheswayandyawmodes,whereasFLNGreducesthegapwaterresonancesandrelativemotionswhenlocatedontheweatherside.

简介：针对船舶柴油机故障数据少,而正常状态数据丰富的特点,建立粒子群支持向量数据描述的混合算法,对柴油机缸内工作过程进行状态评估.选取并处理缸内气体压力变化数据,并将其作为基准数据,对示功图特征参数进行提取与计算,运用粒子群优化算法获得最优参数,并代入支持向量数据描述算法模型,以获得最小封闭超球体理论半径,将状态点距离正常工作过程理论球心位置的数值与理论半径的数值作对比,以评估柴油机缸内工作过程,并采用待测半径占理论半径相对长度的方式对评估结果进行打分.通过实例验证,表明该方法具有良好的实船应用价值.