Underwater construction 2026
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01 - Monitoring-Based Assessment of Excavation Risk Using Data- Driven Models
Authors: Sachin Admane, Tejas Admane This study proposes a practical, data-driven approach for assessing excavation risk using monitoring data. By analyzing a comprehensive dataset of geotechnical, environmental, and excavation parameters, conventional machine learning models were used to classify risk levels. The models revealed that excavation depth and deformation indicators are the primary drivers of risk classification, with environmental factors playing a secondary role in typical scenarios. This research demonstrates that interpreting monitoring data through data-driven methods can effectively enhance traditional geotechnical assessments for practical excavation risk evaluation.
03 - Investigation of underwater shield tunnel excavation face stability in lower dense and upper loose strata
Authors: Fei Jia, Chuang Wang, Pengfei Li, Xiaopu Cui, Qing Xu, & Zhaoguo Ge This study investigates excavation face stability in saturated sandy-pebble strata with lower dense and upper loose layers using physical model tests and numerical simulations. It examines progressive failure under varying burial depths and proposes a stratum-specific theoretical model, including a formula for limiting effective support compressive stress. Key findings: surface settlement evolves in three stages as the baffle advances; reduced burial depth increases settlement magnitude and range, accelerates loss of stratal equilibrium, raises seepage velocity, and expands the unstable zone, more so than in homogeneous strata at the same depth.
02 - Intelligent Fault-Tolerant Control for Wave Compensation Systems Considering Unmodeled Dynamics and Dead-Zone
Authors: Zhiqiang Xu, Xiaoning Zhao, Zhixin Shen, Yingjia Guo, and Yougang Sun This paper proposes a neural network-based intelligent fault-tolerant control for wave compensation in floating- body salvage equipment. It compensates hydraulic dead- zones via inverse models, learns unmodeled dynamics online with NNs, and handles actuator failures using adaptive laws, with Lyapunov theory proving global stability. Integrating data-driven learning and model-based compensation, the approach reduces model dependence versus traditional sliding-mode methods. Simulations and experiments confirm high-precision tracking under varied sea conditions.
04 - Comparing distributed knowledge: the effects of visualization format and comparison strategy on task performance
Authors: Nicole Hynek, and Dietrich Albert This study investigates how comparative knowledge visualizations aid users in understanding distributed knowledge, focusing on design choices like knowledge representation (concept maps vs. proposition lists) and visual comparison strategies (juxtaposition vs. superimposition). In a mixed-design experiment with 133 participants, results showed that superimposition improved accuracy and speed, particularly with higher task complexity, while juxtaposition was favored for its perceived cognitive usability. Despite varying knowledge representation formats, no significant performance differences were observed.
05 - Research on AE method for thermal fatigue damage in heat transfer oil pipes
Authors: Zhenlong Hu, Xinxin Luo, Junjiao Zhang, Qiufeng, Changhui Huang, Chao Lu, and Xin Li This study addresses the unmet need for dynamic monitoring of thermal fatigue damage in thermal oil pipes used in concentrated solar power systems. Using acoustic emission (AE) technology, it designs U-shaped 20# steel specimens mimicking real pipe geometry and material properties, develops an inner-wall thermal cycling device to replicate operational stress conditions, and establishes an AE detection system. AE signal characteristics, particularly energy, are analyzed across thermal fatigue initiation and propagation stages.
06 - Time grabbing as a chronopolitical mechanism in wind power development.
Authors: Henrikke Sæthre Ellingsen This article examines Norway's onshore wind power conflicts via Fosen and Frøya cases. Fosen's Supreme Court ruling found turbines violated Indigenous Saami rights in reindeer pastures; Frøya saw rural community resistance. Introducing 'time grabbing' from chronopolitics—as governmental reconfiguration of temporal horizons complementing land grabbing—the study identifies mechanisms of acceleration, protraction, and epistemic exclusion. These subordinate local temporalities and decision-making to national energy agendas, displacing agency and weakening democratic legitimacy in the transition.
07 - Technical screening of wind turbine installation vessel compatibility for offshore wind deployment in Brazil
Authors: Victor C. H. A. Carvalho, Marcos Aurélio Vasconcelos Freitas, Julian Hunt This study assesses WTIV suitability for Brazil’s offshore wind (>80 GW proposed) amid limited infrastructure and vessels. Screening 77 vessels on crane height, lifting capacity, and depth for 15 MW turbines found only 22% meet requirements. Restricted to technical feasibility, it provides a replicable framework for aligning ambitions with capacity in Brazil and other emerging markets.
08 - Advanced and Emerging Marine Engineering Technologies - Proceedings of 2024 3rd International Joint Conference on Civil and Marine Engineering (JCCME 2024)
Editors: Decheng Wan, Dezhi Ning, Hao Tian These proceedings cover a wide range of topics related to civil and marine engineering, highlighting pioneering research and emerging trends. They include developments in port and coastal engineering, offshore engineering, fluid-structure interactions, intelligent maritime structures, maritime rescue and salvage technologies, ocean energy extraction, maritime sensor technologies, mechatronic systems for ocean environments, and polar region technologies. Overall, these proceedings reflect the state-of-the-art research and technological progress presented at the 2024 conference, contributing to the advancement of knowledge and innovation in marine and civil engineering disciplines.
09 - Proceedings of the 22nd International Ship and Offshore Structures Congress (Volume 2)
Editors: Wenwei Wu, Jun Ding This document is a collection of eight specialist committee reports presented at the ISSC 2025 held in Wuxi, China. This volume #2 focuses on advancing the understanding of marine structural design, production, and operation through international collaboration among experts. It covers a broad range of topics including environmental loads, design methods, ship structural integrity, and integrates quasi-static and dynamic responses with fatigue-fracture analysis to ensure holistic marine system reliability.
11 - Intelligent Mapping and Control of Stresses in a Hydraulic Materials Handling Crane
Editors: Appiah-Osei Agyemang, Sasu Mäkinen, and Daniel Roozbahani This research aimed to create an intelligent stress mapping and control system using Artificial Intelligence (AI) to enhance the fatigue life of a hydraulic crane. The crane's boom was modeled and analyzed using ANSYS, ADAMS, and MATLAB (specialized software tools commonly used in engineering and scientific research for modeling, simulation, and analysis). Stress optimization utilized a Neural Network algorithm. Two AI-based control platforms, one using Neural Networks and the other Fuzzy Logic, were developed to improve crane movements and manage structural stress. Testing showed a notable increase in the crane's fatigue life and reduced vibrations.
10 - Directional Response and Strength Assessment of Truss-Type Legs for a Wind Turbine Installation Vessel Under Crane Angles and Wave Loads
Editors: Jianhong Wang, Yongkang Zhang, Yangfan Luo, Yubo Yuan, and He Wu This study addresses the structural safety of truss-type legs for jack-up wind turbine installation vessels (WTIVs) under complex operational and environmental loads. Focusing on the directional coupling effect between crane slewing angles and wave directions, it establishes a finite element model using SESAM and verifies its reliability. The analysis reveals significant directional dependence and stiffness anisotropy in structural response. Peak displacement and stress occur at a crane slewing angle of 270°, with the maximum displacement being about 33% higher than the minimum.
12 - Underwater explosions
Editor: Lemi Türker An underwater explosion is a complex physical and chemical process that releases energy, producing high- temperature and high-pressure gas. The resulting shock wave propagates radially in water, with its peak pressure dependent on the explosive charge and distance. The explosion load can be divided into impact load and bubble action load, both of which can cause damage to ships or submarines. Accurate measurement of underwater explosion loads is crucial for ship design.