简介：[摘要] 本文基于近年来市场大热的液化天然气运输船相关项目，全面系统的介绍了低温液货处理系统在线弹簧式安全阀相关结构，低温系统运用特殊要求，阀门的计算选型等，以便为其它类似的船型正确选用合理的安全阀提供一定的参考，同时也为初涉者能够更好的了解其工作原理以及一些选型参数的计算提供帮助。

简介：[摘要] 近些年来，随着科技不断进步以及全球海运市场逐步向绿色航行，节能减排及新的碳排放标准的实施，尤其是对于绿色新能源市场的需求日益增长起到了积极的带动效果。而针对天然气作为其中最重要也是被最广泛使用的清洁能源的研究显得尤为重要。对于液化天然气系统的研究中控制阀是其中最重要的设备之一。控制阀作为系统调节的关重设备，合理优化的选型对整个系统的安全可靠运行至关重要。本文通过对低温液货系统控制阀的介绍以及选型计算的研究，旨在为其它类似工程的控制阀门选型提供一定的指导和参考。

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.