AIRS in the AIR

概述
日期
2024年12月06日
16:00 - 17:00
地点
AIRS

AIRS in the AIR |无损检测技术与数字孪生在海洋场景中的应用

为海洋可再生能源和海岸保护设计的下一代浮动结构的焊接接头经常受到环境作用的循环载荷，导致关键焊接细节的疲劳裂纹产生和扩展。为了确保这些结构的安全、可持续运行，同时优化检查和维护的生命周期成本，需要对这些关键结构部件进行精确的裂缝尺寸测定。

本期AIRS in the AIR系列讲座邀请新加坡国立大学土木与环境工程系副教授、副主任钱旭东分享其团队在先进的无损检测（NDT）技术方面的研究进展，并介绍一个由物理信息和数据驱动的数字孪生框架，用于确定焊接连接中表面裂纹的大小和形状。讲座还将讨论数字孪生技术在大型海上结构中的更广泛应用，强调其在恶劣海洋环境中对关键基础设施的监测、评估和维护进行革命性变革的潜力。

  • 朱建
    AIRS软体机器人中心主任、香港中文大学（深圳）理工学院副教授
  • 钱旭东
    新加坡国立大学土木与环境工程系副教授、副主任；结构与海洋工程组组长；海洋研究与工程中心主任
    Data-Driven Framework for Monitoring Crack Sizes in Welded Joints – Integration with Digital Twins

    Dr. QIAN Xudong is currently an Associate Professor in the Department of Civil and Environmental Engineering (CEE) at the National University of Singapore (NUS), Deputy Head (Administration and Finance) of CEE at NUS, Group Head of the Structural and Offshore Engineering, Director (Strategy, Partnership and Technology Translation) for Coastal Protection and Flood Resilience Institute Singapore (CFISG), Director for Centre for Offshore Research and Engineering (CORE), and Director for Centre for Advanced Materials and Structures (CAMS) NUS. He received his Bachelor (1st Class Honors) and PhD in Civil Engineering from NUS in 2000 and 2005, respectively. Prior to joining NUS as a faculty member, he worked as a post-doctoral research associate in the Department of Civil and Environmental Engineering, University of Illinois at Urbana Champaign (UIUC). Prof Qian’s research interest focuses on the integrity assessment of structures and data driven predictive maintenance. Prof Qian is a member of the editorial board in a number of premier journals including International Journal of Fatigue, Engineering Fracture Mechanics, Fatigue and Fracture of Engineering Materials and Structures, etc. Prof Qian has been serving as members in different Technical Committees for the International Ship and Offshore Structures Congress from 2009 to 2018.  He is also a member of the technical committee in American Society of Testing and Material E08 – Fatigue and Fracture and F42 – Additive Manufacturing.

    Welded joints in next-generation floating structures designed for ocean renewables and coastal protection often experience cyclic loadings from environmental actions, leading to fatigue crack initiation and propagation in critical welded details. Ensuring the safe, sustainable operation of these structures while optimizing lifecycle costs for inspection and maintenance requires accurate crack sizing in these critical structural components. This lecture shares the journey, which the speaker’s research group has undertaken, in advanced nondestructive testing (NDT) techniques for measuring crack sizes in welded connections, focusing on methods such as Alternating Current Potential Difference (ACPD) and Ultrasonic Phased Array (UPA). Building on these NDT results as benchmarks, the presentation introduces a physics-informed, data-driven digital twin framework for determining the size and shape of surface cracks in welded connections. The digital twin, a virtual replica of the physical structure integrated with real-time sensor data, treats the crack sizing as a classification problem. Results demonstrate that the crack sizes predicted by the digital twin align closely with measurements from physical specimens. The talk will also discuss the broader application of digital twin technology in large-scale offshore structures, emphasizing its potential to revolutionize the monitoring, assessment, and maintenance of critical infrastructure in harsh marine environments.

视频回顾