{"id":10068,"date":"2021-12-22T09:38:55","date_gmt":"2021-12-22T01:38:55","guid":{"rendered":"https:\/\/cde.nus.edu.sg\/cee\/?page_id=10068"},"modified":"2022-10-03T15:55:19","modified_gmt":"2022-10-03T07:55:19","slug":"enhancing-offshore-system-productivity-integrity-and-survivability-in-extreme-environments-wp2-local-digital-twin","status":"publish","type":"page","link":"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ocean-infrastructure-and-renewables\/enhancing-offshore-system-productivity-integrity-and-survivability-in-extreme-environments-wp2-local-digital-twin\/","title":{"rendered":"Enhancing Offshore System Productivity, Integrity and Survivability in Extreme Environments \u2013 WP2: Local Digital Twin"},"content":{"rendered":"\n\n\t\t\t\t\t<ul id=\"menu-research\"><li id=\"menu-item-13844\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/\">Research Clusters<\/a>\n<ul>\n\t<li id=\"menu-item-13848\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/built-environment\/\">Built Environment 4.0<\/a>\n\t<ul>\n\t\t<li id=\"menu-item-14104\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/built-environment\/autonomous-bim-ready-drone-system-for-building-facades-inspection\/\">Autonomous BIM-ready Drone System for Building Facades Inspection<\/a><\/li>\n\t\t<li id=\"menu-item-14105\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/built-environment\/intelligent-lifting-frame-for-ppvc-and-precast-construction\/\">Intelligent Lifting Frame for PPVC and Precast Construction<\/a><\/li>\n\t\t<li id=\"menu-item-14106\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/built-environment\/lightweight-high-strength-steel-concrete-composite-modular-buildings-with-fast-track-connections\/\">Lightweight High-Strength Steel-Concrete Composite Modular Buildings with Fast Track Connections<\/a><\/li>\n\t<\/ul>\n<\/li>\n\t<li id=\"menu-item-13847\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ccm\/\">Climate Change Mitigation<\/a>\n\t<ul>\n\t\t<li id=\"menu-item-14111\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ccm\/bridging-scales-from-below\/\">Bridging Scales from Below: The Role of Heterogeneities in the Global Water and Carbon Budgets<\/a><\/li>\n\t\t<li id=\"menu-item-14108\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ccm\/increasing-occurrences-of-cyanobacterial-blooms-driven-by-climate-change-factors\/\">Increasing Occurrences of Cyanobacterial Blooms Driven by Climate Change Factors<\/a><\/li>\n\t\t<li id=\"menu-item-14107\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ccm\/carbon-capture-and-utilization\/\">Carbon Capture and Utilization<\/a><\/li>\n\t\t<li id=\"menu-item-14109\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ccm\/integrated-coastal-inland-flood-model-for-climate-change\/\">Integrated Coastal-Inland Flood Model for Climate Change<\/a><\/li>\n\t\t<li id=\"menu-item-14110\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ccm\/pathways-for-sustainable-and-climate-resilient-planning-of-water-energy-food-security-nexus\/\">Pathways for Sustainable and Climate-Resilient Planning of Water-Energy-Food Security Nexus<\/a><\/li>\n\t<\/ul>\n<\/li>\n\t<li id=\"menu-item-13846\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/environmental-sustainability\/\">Environmental Sustainability<\/a>\n\t<ul>\n\t\t<li id=\"menu-item-14113\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/environmental-sustainability\/air-quality-and-health-a-paradigm-shift\/\">Air Quality and Health: A Paradigm Shift<\/a><\/li>\n\t\t<li id=\"menu-item-14114\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/environmental-sustainability\/surface-water-quality-and-emerging-contaminants\/\">Surface Water Quality and Emerging Contaminants<\/a><\/li>\n\t\t<li id=\"menu-item-14115\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/environmental-sustainability\/microbial-detoxification-of-persistent-organohalide-pollutants-pops\/\">Microbial detoxification of persistent organohalide pollutants (POPs)<\/a><\/li>\n\t\t<li id=\"menu-item-14116\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/environmental-sustainability\/nutrients-removal-in-waterbodies-via-sustainable-pathways\/\">Nutrients Removal in Waterbodies via Sustainable Pathways<\/a><\/li>\n\t\t<li id=\"menu-item-14117\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/environmental-sustainability\/centre-for-water-research-cwr-researchers-join-their-forces-with-u-of-t-researchers-for-microplastics-pollution-detection-and-control-in-water-and-wastewater\/\">Centre for Water Research (CWR) researchers join their forces with U of T researchers for microplastics pollution detection and control in water and wastewater<\/a><\/li>\n\t<\/ul>\n<\/li>\n\t<li id=\"menu-item-13845\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ocean-infrastructure-and-renewables\/\">Ocean Infrastructure and Renewables<\/a>\n\t<ul>\n\t\t<li id=\"menu-item-14118\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ocean-infrastructure-and-renewables\/\">Ocean Infrastructure and Renewables<\/a><\/li>\n\t\t<li id=\"menu-item-14119\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ocean-infrastructure-and-renewables\/evaluation-of-in-situ-consolidation-of-dredged-and-excavated-materials-at-the-reclaimed-next-generation-tuas-port\/\">Evaluation of In-Situ Consolidation of Dredged and Excavated Materials at the Reclaimed Next Generation Tuas Port<\/a><\/li>\n\t\t<li id=\"menu-item-14120\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/ocean-infrastructure-and-renewables\/enhancing-offshore-system-productivity-integrity-and-survivability-in-extreme-environments-wp2-local-digital-twin\/\">Enhancing Offshore System Productivity, Integrity and Survivability in Extreme Environments &#8211; WP2: Local Digital Twin<\/a><\/li>\n\t<\/ul>\n<\/li>\n\t<li id=\"menu-item-13843\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/resilient-infrastructures\/\">Resilient Infrastructures<\/a>\n\t<ul>\n\t\t<li id=\"menu-item-14121\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/resilient-infrastructures\/digital-fabrication-of-concrete-for-sustainable-and-resilient-built-environment\/\">Digital Fabrication of Concrete for Sustainable and Resilient Built Environment<\/a><\/li>\n\t\t<li id=\"menu-item-14122\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/resilient-infrastructures\/upcycling-local-waste-for-sustainable-concreting-in-marine-conditions\/\">Upcycling Local Waste for Sustainable Concreting in Marine Conditions<\/a><\/li>\n\t\t<li id=\"menu-item-14123\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/resilient-infrastructures\/development-of-sustainable-self-healing-concrete-by-use-of-recycled-materials\/\">Development of Sustainable Self-Healing Concrete by Use of Recycled Materials<\/a><\/li>\n\t\t<li id=\"menu-item-14124\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/resilient-infrastructures\/low-carbon-construction-materials-incorporating-solid-waste\/\">Low-carbon Construction Materials Incorporating Solid Waste<\/a><\/li>\n\t<\/ul>\n<\/li>\n\t<li id=\"menu-item-13842\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/slc\/\">Smart and Liveable Cities<\/a>\n\t<ul>\n\t\t<li id=\"menu-item-14125\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/slc\/intelligent-traffic-diffusion-plan-generation-effective-assessment-and-dissemination-strategies\/\">Intelligent Traffic Diffusion Plan Generation, Effective Assessment and Dissemination Strategies<\/a><\/li>\n\t\t<li id=\"menu-item-14126\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/slc\/transforming-waste-into-resources-for-infrastructural-development\/\">Transforming Waste into Resources for Infrastructural Development<\/a><\/li>\n\t\t<li id=\"menu-item-14127\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/slc\/look-ahead-integrated-geophysical-investigation-system-igis-for-singapore-tunnels\/\">Look-Ahead Integrated Geophysical Investigation System (IGIS) for Singapore Tunnels<\/a><\/li>\n\t\t<li id=\"menu-item-14128\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-clusters\/slc\/next-generation-airport-pavements-with-full-scale-instrumented-testing\/\">Next-Generation Airport Pavements with Full-Scale Instrumented Testing<\/a><\/li>\n\t<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li id=\"menu-item-13849\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-centres\/\">Research Centres<\/a>\n<ul>\n\t<li id=\"menu-item-14131\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-centres\/centre-for-advanced-materials-and-structures\/\">Centre for Advanced Materials and Structures<\/a><\/li>\n\t<li id=\"menu-item-14132\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-centres\/centre-for-hazard-research\/\">Centre for Hazard Research<\/a><\/li>\n\t<li id=\"menu-item-14130\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-centres\/centre-for-soft-ground-engineering\/\">Centre for Soft Ground Engineering<\/a><\/li>\n\t<li id=\"menu-item-14129\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-centres\/centre-for-transportation-research\/\">Centre for Transportation Research<\/a><\/li>\n\t<li id=\"menu-item-13850\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-centres\/centre-for-water-research\/\">Centre for Water Research<\/a><\/li>\n<\/ul>\n<\/li>\n<li id=\"menu-item-13852\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/laboratories\/\">Laboratories<\/a>\n<ul>\n\t<li id=\"menu-item-13851\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/laboratories\/structural-engineering-laboratory\/\">Structural Engineering Laboratory<\/a><\/li>\n\t<li id=\"menu-item-14137\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/laboratories\/itvs-laboratory\/\">ITVS Laboratory<\/a><\/li>\n\t<li id=\"menu-item-14136\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/laboratories\/hydraulic-engineering-laboratory\/\">Hydraulic Engineering Laboratory<\/a><\/li>\n\t<li id=\"menu-item-14135\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/laboratories\/highway-engineering-laboratory\/\">Highway Engineering Laboratory<\/a><\/li>\n\t<li id=\"menu-item-14134\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/laboratories\/geotechnical-engineering-laboratory\/\">Geotechnical Engineering Laboratory<\/a><\/li>\n\t<li id=\"menu-item-14133\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/laboratories\/environmental-engineering-laboratory\/\">Environmental Engineering Laboratory<\/a><\/li>\n<\/ul>\n<\/li>\n<li id=\"menu-item-13854\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/graduate\/graduate-research\/safety-health-committee\/\">Safety &amp; Health Committee<\/a><\/li>\n<li id=\"menu-item-13855\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/graduate\/graduate-research\/completed-research-projects\/\">Completed Research Projects<\/a><\/li>\n<li id=\"menu-item-13856\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/research-brief\/\">Research Brief<\/a><\/li>\n<li id=\"menu-item-13857\"><a href=\"https:\/\/cde.nus.edu.sg\/cee\/research\/achievements-in-the-media\/\">Achievements (in the media)<\/a><\/li>\n<\/ul>\t\n\t<h2>\n\t\tEnhancing Offshore System Productivity, Integrity and Survivability in Extreme Environments &#8211; WP2: Local Digital Twin\n\t<\/h2>\n\t<p>Fatigue or corrosion damage at critical hotspots in offshore and marine structures poses severe threats to the safety of these structures and can lead to substantial financial, ecological or human losses. Accurate prediction of both early stage damage, when the repair cost is low and manageable, and the evolution of the damage, is essential for their sustainable and safe operation. The digital twin, coupled with modelling and sensor data, creates a duplicate of the physical asset in the digital world and allows identification of the critical hotspots and accurate predictions of the damage initiation and evolution under complex loading conditions.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/cde.nus.edu.sg\/wp-content\/uploads\/sites\/7\/2021\/12\/fig1_digital_art_x4-300x191.jpg\" alt=\"Enhancing Offshore System Fig 1 \" width=\"443\" height=\"282\" \/><\/p>\n<p><em>A digital twin for a local detail\u00a0<\/em><\/p>\n<p>Digital twinning of engineering structures under cyclic actions, e.g. bridges, ships, and offshore platforms, requires a progressive update on the possible crack sizes at critical details. Under cyclic environmental loadings, accurate crack size estimation is essential in evaluating the remaining fatigue life of welded structural components before a repair becomes mandatory. The accurate fatigue assessment depends on the precise fatigue crack initiation and propagation evaluation. This research work proposes an adaptive learning framework to determine and update the crack-front profile at the toe of welded plate joints based on the strain relaxation data. This study determines the crack depth by classifying the nodes in the thickness direction as open nodes on the crack surface and closed nodes on the intact ligament, through a neural network approach (Fig. 1). To update the crack size during the loading history, this research employs the modified bootstrap particle filtering approach (Fig. 2), which entails enhanced adjustment capabilities by imposing additional uncertainty distributions. This approach improves the crack size prediction by absorbing limited measurement data on the strain values or crack sizes (Fig. 3).<\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/cde.nus.edu.sg\/wp-content\/uploads\/sites\/7\/2021\/12\/Fig2_digital_art_x4-197x300.jpg\" alt=\"Enhancing Offshore System Fig 2\" width=\"197\" height=\"300\" \/><\/p>\n<p><em>Fig.1<\/em><\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/cde.nus.edu.sg\/wp-content\/uploads\/sites\/7\/2021\/12\/Fig3_digital_art_x4-238x300.jpg\" alt=\"Enhancing Offshore System Fig 3\" width=\"238\" height=\"300\" \/><\/p>\n<p><em>Fig.2<\/em><\/p>\n<\/td>\n<td>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/cde.nus.edu.sg\/wp-content\/uploads\/sites\/7\/2021\/12\/Enhancing-Offshore-System-Fig-4.1-300x275.png\" alt=\"Enhancing Offshore System Fig 4.1\" width=\"327\" height=\"300\" \/><\/p>\n<p><em>Fig.3<\/em><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>For more details, please contact:<br \/><a href=\"https:\/\/cde.nus.edu.sg\/cee\/staff\/qian-xudong\/\" target=\"_blank\" rel=\"noopener\"><strong>Assoc Prof Qian Xudong<\/strong><\/a><br \/>Email: <a href=\"mailto:qianxudong@nus.edu.sg\" target=\"_blank\" rel=\"noopener\">qianxudong@nus.edu.sg<\/a><\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Research Clusters Built Environment 4.0 Autonomous BIM-ready Drone System for Building Facades Inspection Intelligent Lifting Frame for PPVC and Precast Construction Lightweight High-Strength Steel-Concrete Composite Modular Buildings with Fast Track Connections Climate Change Mitigation Bridging Scales from Below: The Role of Heterogeneities in the Global Water and Carbon Budgets Increasing Occurrences of Cyanobacterial Blooms Driven [&hellip;]<\/p>\n","protected":false},"author":54,"featured_media":9438,"parent":10042,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-10068","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - 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