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  • 简介:AmethodofreliabilityanalysisbasedonadirectstrengthcalculationemployingthevonMisesstressfailurecriterionispresentedhere.Theshorttermstraindistributionsofshiphullstructuralcomponentsareidentifiedthroughthestatisticalanalysisofthewave-inducedstrainhistoryandthelongtermdistributionsbytheweightedsummationoftheshorttermstraindistributions.Thewave-inducedlongtermstraindistributioniscombinedwiththestillwaterstrain.Theextremestraindistributionoftheresponsestrainisobtainedbystatisticalanalysisofthecombinedstrains.ThelimitstatefunctionofthereliabilityanalysisisbasedonthevonMisesstressfailurecriterion,includingtherelateduncertaintiesduetothequalityofthematerialandmodeluncertainty.ThereliabilityindexiscalculatedusingFORMandsensitivityanalysisofeachvariablethathaseffectsonthereliabilityisalsodiscussed.

  • 标签: SHIP HULL YIELD STRESS SHIP structures
  • 简介:Theobjectiveofthisworkistoanalysefatiguereliabilityofdeckstructuressubjectedtocorrelatedcrackgrowth.Thestressintensityfactorsofthecorrelatedcracksareobtainedbyfiniteelementanalysisandbasedonwhichthegeometrycorrectionfunctionsarederived.TheMonteCarlosimulationsareappliedtopredictthestatisticaldescriptorsofcorrelatedcracksbasedontheParis-Erdoganequation.Aprobabilisticmodelofcrackgrowthasafunctionoftimeisusedtoanalysethefatiguereliabilityofdeckstructuresaccountingforthecrackpropagationcorrelation.Adeckstructureismodelledasaseriessystemofstiffenedpanels,whereastiffenedpanelisregardedasaparallelsystemcomposedofplatesandarelongitudinal.Ithasbeenproventhatthemethoddevelopedherecanbeconvenientlyappliedtoperformthefatiguereliabilityassessmentofstructuressubjectedtocorrelatedcrackgrowth.

  • 标签: CRACK growth FATIGUE reliability DECK structures
  • 简介:<正>Glasgow,UK18th-20thAugust2014AbouttheconferenceTheconferencewillbringtogetherresearchers,practitionerstoaddressthesafetyandreliabilityissuesasapplicabletodifferentstagesintheanalysis,designconstructionandin-servicelifeofmarinestructuressuchasship,offshore,submergedstructuresandtherenewableenergystructures.Thiswillinvolveadvancedanalysisbothforstrengthandloadmodelinordertoestablishsafetylevelbothfordeterministicmodel(WSDmethod)andforreliabilitybaseddesign(LRFDmethod).Oneoftheaimsofthedesignshouldbetoachieveadequatebutnotexcessivelevelofsafetywhichcanbesatisfiedthroughreliabilitybasedmethodandthistakesintoaccountuncertaintiesofdesignvariables.CurrentmoderncodesaretryingtoprovidedesignproceduresonLRFDformatalthoughnoexplicitreliabilityanalysisisdonetoarrivethesepartialsafetyfactors.Thisconferencewilldealwithalltheseissuesandseehowthesetechniquesareappliedtovarioustypesofmarinestructures.Glasgow,thevenueforthisconferenceisacitywhichhaslotofattractions.TheworldfamousLoch-LomondisonlyfewmilesawayandEdinburghis50minutesjourneybytrain.Thecitywillalsohostthe2014CommonwealthGames.

  • 标签: 船舶安全 可靠性 国际会议 水下结构 离岸
  • 简介:2017年,全球经济持续复苏,贸易形势不断回暖,全球海运贸易增速提升。联合国2017年12月11日发布的《2018年世界经济形势与展望》报告显示,2017年全球经济增长趋强,增长速度达N3%,为近七年来的最高。IMF预测今年全球经济增速为3.6%,显著高于2016年3.2%的全球经济增长率。其中,美国、欧洲、日本和加拿大等发达经济增长普遍提速,

  • 标签: 经济增长率 生产 港口 全球经济 海运贸易 经济形势
  • 简介:在2012年9月9日闭幕的APEC第20次领导人非正式会议上,有关建立可靠的供应链问题取得了进展,此次会议强调增强供应链的便利化和联通性,增强可靠供应链意在深化全球供应链合作。有关供应链的建设是本次会议的四大议题之一。在此问题上,APEC各成员达成共识,争取2015年前在时间和成本等方面实现本地区供应链便利化程度提高10%的目标。这是会议达成的两个重要量化指标之一,体现了领导人推进此问题的政治意志,在APEC合作框架下,各成员将就此共识的落实做出持续的努力。

  • 标签: 全球供应链 全球一体化 助推器 APEC 量化指标 领导人