CN116783113A - 船舶用液化气罐的状态推断系统和状态推断方法 - Google Patents

船舶用液化气罐的状态推断系统和状态推断方法 Download PDF

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CN116783113A
CN116783113A CN202180087958.7A CN202180087958A CN116783113A CN 116783113 A CN116783113 A CN 116783113A CN 202180087958 A CN202180087958 A CN 202180087958A CN 116783113 A CN116783113 A CN 116783113A
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liquefied gas
tank
gas tank
state
ship
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上田雄一郎
今井达也
白土透
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Kawasaki Motors Ltd
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Kawasaki Jukogyo KK
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B79/00Monitoring properties or operating parameters of vessels in operation
    • B63B79/10Monitoring properties or operating parameters of vessels in operation using sensors, e.g. pressure sensors, strain gauges or accelerometers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B79/00Monitoring properties or operating parameters of vessels in operation
    • B63B79/20Monitoring properties or operating parameters of vessels in operation using models or simulation, e.g. statistical models or stochastic models
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B79/00Monitoring properties or operating parameters of vessels in operation
    • B63B79/30Monitoring properties or operating parameters of vessels in operation for diagnosing, testing or predicting the integrity or performance of vessels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C13/12Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01Shape
    • F17C2201/0104Shape cylindrical
    • F17C2201/0109Shape cylindrical with exteriorly curved end-piece
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03Orientation
    • F17C2201/035Orientation with substantially horizontal main axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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    • F17C2201/05Size
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    • F17C2203/00Vessel construction, in particular walls or details thereof
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    • F17C2203/0329Foam
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2203/0304Thermal insulations by solid means
    • F17C2203/0358Thermal insulations by solid means in form of panels
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    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00Vessel construction, in particular walls or details thereof
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    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602Wall structures; Special features thereof
    • F17C2203/0612Wall structures
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    • F17C2203/0629Two walls
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    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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    • F17C2221/01Pure fluids
    • F17C2221/012Hydrogen
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/01Pure fluids
    • F17C2221/016Noble gases (Ar, Kr, Xe)
    • F17C2221/017Helium
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00Handled fluid, in particular type of fluid
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146Two-phase
    • F17C2223/0153Liquefied gas, e.g. LPG, GPL
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146Two-phase
    • F17C2223/0153Liquefied gas, e.g. LPG, GPL
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
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    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F17C2260/00Purposes of gas storage and gas handling
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Abstract

在推断设置于船舶(3)的液化气罐(7)的状态的系统(1)中设置有:测量单元(31),其具有测量与所述液化气罐(7)的强度相关的状态的测量器(39);计算单元(33),其利用事前分析模型来计算与所述液化气罐(7)的强度相关的状态;数据同化单元(35),其通过使用了所述测量单元(31)所取得的测量结果的数据同化来更新所述事前分析模型;以及评价单元(37),其根据从所述计算单元(33)输出的计算结果来评价所述液化气罐(7)的状态。

Description

船舶用液化气罐的状态推断系统和状态推断方法
关联申请
本申请主张2020年12月28日申请的日本特愿2020-219014的优先权,以参照的方式引用其整体作为构成本申请的一部分的内容。
技术领域
本发明涉及推断船舶用液化气罐的状态的系统和方法。
背景技术
以往,在液化天然气、液化氢等液化气的搬运中利用具有液化气罐的搬运船(例如,参照专利文献1)。通常,在运用了数十年这样的长时间的船舶用液化气罐的维护中,通过定期进行的检查来确认有无因疲劳引起的损伤等,根据需要而进行修补工程。
现有技术文献
专利文献
专利文献1:日本特开2015-004382号公报
发明内容
发明要解决的课题
但是,为了可靠地搬运极低温的液化气,罐要求高可靠性,因此优选能够事前掌握罐损伤的发生。但是,很难适时且实际地检查长时间设置于船舶的罐。因此,期望能够高精度地预测罐的强度状态的手段。
本发明的目的在于,提供能够高精度地预测船舶用液化气罐的状态的系统和方法。
用于解决课题的手段
为了实现上述目的,本发明的船舶用液化气罐的状态推断系统推断设置于船舶的液化气罐的状态,其中,该船舶用液化气罐的状态推断系统具有:测量单元,其具有测量与所述液化气罐的强度相关的状态的测量器;计算单元,其利用事前分析模型来计算与所述液化气罐的强度相关的状态;数据同化单元,其通过使用了所述测量单元所取得的测量结果的数据同化来更新所述事前分析模型;以及评价单元,其根据从所述计算单元输出的计算结果来评价所述液化气罐的状态。
并且,本发明的船舶用液化气罐的状态推断方法推断设置于船舶的液化气罐的状态,其中,该船舶用液化气罐的状态推断方法包含以下内容:测量与所述液化气罐的强度相关的状态;利用事前分析模型来计算与所述液化气罐的强度相关的状态;通过使用了所述测量单元所取得的测量结果的数据同化来更新所述事前分析模型;以及根据从所述计算单元输出的计算结果来评价所述液化气罐的状态。
根据该结构,不仅能够通过使用了事前分析模型的计算来事前推断液化气罐的状态,还能够通过使用了液化气罐的测量结果的数据同化而使事前分析模型接近作为实际推断对象的液化气罐,因此能够进行高精度的推断。
权利要求书和/或说明书和/或附图中公开的至少2个结构的任意组合都包含于本发明。特别是权利要求书的各权利要求的2个以上的任意组合都包含于本发明。
附图说明
根据参考了附图的以下优选的实施方式的说明,能够更清楚地理解本发明。然而,实施方式和附图仅用于图示和说明,并非用于限定本发明的范围。本发明的范围由所附的权利要求书来确定。在附图中,多个附图中的相同的标号表示相同或相当的部分。
图1是示出本发明的一个实施方式的船舶用液化气罐状态推断系统以及应用了该系统的液化气罐和液化气贮存船的概略结构的沿着图2的I-I线的横剖视图。
图2是示出图1的液化气罐和液化气贮存船的概略结构的纵剖视图。
图3是示出图2的图1的实施方式的变形例的液化气罐和液化气贮存船的概略构造的纵剖视图。
图4是沿着图3的液化气罐和液化气贮存船的IV-IV线的横剖视图。
图5是示出本发明的一个实施方式的船舶用液化气罐状态推断方法的流程图。
具体实施方式
以下,参照附图对本发明的优选的实施方式进行说明。在图1中示出了液化气贮存船3,该液化气贮存船3是应用了本发明的一个实施方式的船舶用液化气罐状态推断系统(以下,简称为“状态推断系统”)1的船舶。如图2所示,该液化气贮存船3具有浮于水上的船体5和设置于船体5的贮存液化气的液化气罐(以下,简称为“罐”)7。
另外,在本说明书中,“液化气贮存船”是指具有贮存液化气的功能的所有船舶。本实施方式的液化气贮存船3是液化气搬运船。当然,除了液化气搬运船之外,例如液化气燃料船、向其他船舶提供液化气的燃料仓储船等也包含于液化气贮存船3。
在罐7安装有用于在罐7与其外部、例如陆地上的液化气贮存基地之间移送液化气的未图示的配管。在图示的例子中,罐7具有向上方突出的圆顶部7a,配管的一端安装于该圆顶部7a。配管从罐7的内部贯通圆顶部7a而向罐7的外部延伸设置。
贮存于罐7的液化气例如是液化石油气(LPG,约-45℃)、液化乙烯气体(LEG,约-100℃)、液化天然气(LNG,约-160℃)、液化氢(LH2,约-250℃)、液化氦(LHe,约-270℃)等。
在本实施方式中,在罐7中贮存有液化氢。
在本实施方式中,在液化气贮存船3的船体5设置有2个罐7。这2个罐7沿船体5的船长方向排列。但是,搭载于船体5的罐7的数量也可以是1个,也可以是3个以上。由于各罐7的结构相同,因此在本说明书中,仅对1个罐7进行说明。
图示例子的罐7是与船体5独立地形成的独立型罐7。并且,该罐7具有圆筒形状的两端部呈圆顶状鼓出的稻草包形状。罐7的上部被与船体5一体地设置的罐罩9覆盖。另外,罐7的形状不限于该例,例如也可以是球形,也可以是方形。
并且,在本实施方式中,如图1所示,罐7构成为具有内槽11和外槽13的双重壳罐7。例如,在内槽11与外槽13之间形成有真空隔热层。不过,罐7的结构不限于该例。例如,罐7也可以是由隔热材料覆盖的单壳罐。该情况下的隔热材料例如可以由多个真空隔热板构成,也可以由多个发泡板构成。
如图2所示,在船体5形成有供各罐7设置的凹部15,该凹部15在罐7之间被分隔壁17分割成2个单元。如图1所示,在各单元的底壁19上配置有一对罐支承部件21。一对罐支承部件21在沿罐7的轴向相互分离的位置对罐7进行支承。各罐支承部件21从底壁19突出设置。罐7通过设置在罐支承部件21上而以与形成船体5的单元的各壁分离的状态被支承。在本实施方式中,通过这样的结构,将罐7安装于船体5。
并且,在内槽11与外槽13之间配置有支承内槽11的内槽支承部件23。在该例中,内槽支承部件23设置在罐支承部件21的延长线上。通过该内槽支承构件23将内槽11和外槽13连接。内槽11经由内槽支承构件23和外槽13而被船体5支承。此外,内槽支承构件23可以仅固定于内槽11和外槽13中的任意一方,并设置为与另一方接触,也可以固定于双方。并且,内槽支承部件23也可以不设置在罐支承部件21的延长线上,也可以设置于在船长方向上与罐支承部件21错开的位置。
此外,罐7相对于船体5的支承方式不限于上述所说明的例子,可以根据罐7和船体5的构造而适当选择。例如,在如图3所示的变形例那样,罐7为球形形状的情况下,能够采用如图4所示那样将罐7支承于船体5的圆筒状的罐支承部件21以及夹装在内槽11与外槽13之间的圆筒状的内槽支承部件23。
接下来,对推断具有上述结构的液化气罐7的状态的本实施方式的状态推断系统1以及使用该系统的状态推断方法进行说明。如图1所示,状态推断系统1具有测量单元31、计算单元33、数据同化单元35以及评价单元37。
测量单元31具有测量与液化气罐7的强度相关的状态的测量器39,通过测量器39来测量前述状态(测量步骤S1)。通过测量单元31的测量器39所测量的“与液化气罐7的强度相关的状态”例如是对象部分的变形(应变)程度、累积疲劳损伤。测量单元31所具备的测量器39例如是测量应变程度的应变传感器、测量计算累积疲劳损伤所需的裂纹量的疲劳传感器。测量器39可以是仅测量这些参数中的一种参数的传感器,也可以是测量多种参数的多种传感器。
在本实施方式中,测量器39安装于形成从罐7朝向船体5的载荷传递路径(以下,简称为“载荷传递路径”)LP的部分。更具体而言,在该例中,测量器39安装于作为形成载荷传递路径LP的部分的罐支承部件21和内槽支承部件23。
更具体而言,测量器39例如安装于罐支承部件21中与罐7接触的部分的附近和与船体5连结的部分的附近。测量器39例如安装于内槽支承构件23中与内槽11和外槽13接触的部分的附近。
这样,通过将测量器39安装于作为容易产生因疲劳引起的强度降低的部分的载荷传递路径LP,能够高效地测量罐7的状态。另外,形成安装有测量器39的载荷传递路径LP的部分不限于上述例示的罐支承部件21和内槽支承部件23上,也包括罐7和船体5中的这些部件21、23的附近。并且,也可以将测量器39安装于其他部分来代替载荷传递路径LP,或者将测量器39追加安装于其他部分。并且,只要是能够影响罐7的强度的部分即可,也可以在船体5侧安装测量器39。
计算单元33利用事前分析模型来计算与罐7的强度相关的状态(计算步骤S2)。在事前分析模型中设定有设计船体5和罐7的材料物性、边界条件、载荷条件等条件。计算单元33利用该事前分析模型来计算应力、应变等与罐7的强度相关的状态。
数据同化单元35通过使用了测量单元31所取得的测量结果的数据同化来更新前述事前分析模型(数据同化步骤S3)。数据同化是利用实测值统计性地对数值模型的不确定因素进行修正的方法。在本实施方式中,数据同化单元35将在计算单元33所使用的数值分析模型中设定的上述的各种条件和参数与测量单元31所取得的测量结果进行比较,在有显著性差异的情况下,使用测量结果进行修正,由此更新事前分析模型。
评价单元37根据从计算单元33输出的计算结果来评价前述液化气罐7的状态(评价步骤S4)。具体而言,评价单元37根据从计算单元33输出的应力、应变等的值来计算累积疲劳损伤的值,并评价例如是否需要立即修补、到需要修补为止的推断期间。
在本实施方式中,评价单元37通过构造可靠性分析而进行与作为推断对象物的罐7的强度相关的评价。在构造可靠性分析中,计算在规定的期间中作为对象的构造物产生疲劳损伤、静态破坏、脆性破坏等的概率。在本实施方式的例子中,评价单元37使用构造可靠性分析,计算在上述的假定航行期间中在罐7中产生疲劳损伤的概率。作为构造可靠性分析的具体方法,例如,可以使用一般已知的数值积分法、蒙特卡罗(Monte-Carlo)模拟法、一阶可靠性评价法、二阶可靠性评价法、高阶矩法、重点取样法、响应面法等。
通过这样使用构造可靠性分析进行评价,能够将有关罐7的状态的评价结果作为修补的必要性等更实用的信息输出。不过,评价单元37进行的罐7状态的评价也可以不使用构造可靠性分析,而是作为累积疲劳损伤的确定值来输出。
状态推断系统1还可以具有通知单元43,该通知单元43以适当的方法来通知评价单元37的评价结果。通知单元43例如构成为根据疲劳强度降低的程度、在规定的短时间内发生疲劳损伤的概率而显示应进行修补这一内容的警告、应避开暴风雨天气这一内容的警告。
另外,应用了本实施方式的状态推断系统1和状态推断方法的罐7不限于上述的示例。例如,罐7也可以是方形的独立型罐,也可以不是独立型,而是与船体5一体地形成的所谓的膜型罐。
通过本说明书中记载的构成要素所实现的功能也可以安装于被编程为实现该记载的功能的电路(circuitry)或处理电路(processing circuitry),该电路或处理电路包括通用处理器、特定用途处理器、集成电路、ASICs(Application Specific IntegratedCircuits:专用集成电路)、CPU(a Central Processing Unit:中央处理单元)、现有型的电路和/或它们的组合。处理器包括晶体管或其他电路,能够视为电路(circuitry)或处理电路(processing circuitry)。处理器可以是执行保存于存储器中的程序的可编程处理器(programmed processor)。
根据以上所说明的本实施方式的状态推断系统1和状态推断方法,不仅能够通过使用了事前分析模型的计算来事前推断液化气罐7的状态,还能够通过使用了液化气罐7的测量结果的数据同化而使事前分析模型接近作为实际推断对象的液化气罐7,因此能够进行高精度的事前推断。
如上所述,参照附图对本发明的优选的实施方式进行了说明,但在不脱离本发明的主旨的范围内能够进行各种追加、变更或删除。因此,这样的情况也包含于本发明的范围内。
标号说明
1:状态推断系统;3:液化气贮存船(船舶);5:船体;7:液化气罐;9:罐罩;21:罐支承部件;23:内槽支承部件;31:测量单元;33:计算单元;35:数据同化单元;37:评价单元;LP:载荷传递路径。

Claims (6)

1.一种船舶用液化气罐的状态推断系统,其推断设置于船舶的液化气罐的状态,其中,
该船舶用液化气罐的状态推断系统具有:
测量单元,其具有测量与所述液化气罐的强度相关的状态的测量器;
计算单元,其利用事前分析模型来计算与所述液化气罐的强度相关的状态;
数据同化单元,其通过使用了所述测量单元所取得的测量结果的数据同化来更新所述事前分析模型;以及
评价单元,其根据从所述计算单元输出的计算结果来评价所述液化气罐的状态。
2.根据权利要求1所述的船舶用液化气罐的状态推断系统,其中,
所述评价单元通过构造可靠性分析来进行与推断对象物的强度相关的评价。
3.根据权利要求1或2所述的船舶用液化气罐的状态推断系统,其中,
所述液化气罐与所述船舶的船体分体地形成并被支承于所述船体内,
所述测量单元的测量器安装于形成从所述液化气罐朝向所述船体的载荷传递路径的部分。
4.根据权利要求3所述的船舶用液化气罐的状态推断系统,其中,
所述测量器安装于作为形成所述载荷传递路径的部分的罐支承部件,该罐支承部件将所述液化气罐支承于所述船体。
5.根据权利要求3或4所述的船舶用液化气罐的状态推断系统,其中,
所述液化气罐是具有内槽、外槽以及内槽支承部件的双重构造罐,该内槽支承部件设置在所述内槽与所述外槽之间并支承所述内槽,
所述测量器安装于作为形成所述载荷传递路径的部分的所述内槽支承部件。
6.一种船舶用液化气罐的状态推断方法,其推断设置于船舶的液化气罐的状态,其中,
该船舶用液化气罐的状态推断方法包含以下内容:
测量与所述液化气罐的强度相关的状态;
利用事前分析模型来计算与所述液化气罐的强度相关的状态;
通过使用了所述测量单元所取得的测量结果的数据同化来更新所述事前分析模型;以及
根据从所述计算单元输出的计算结果来评价所述液化气罐的状态。
CN202180087958.7A 2020-12-28 2021-12-21 船舶用液化气罐的状态推断系统和状态推断方法 Pending CN116783113A (zh)

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