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Resilient Offshore Structures: Design, Analysis and Optimization
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Resilient Offshore Structures: Design, Analysis and Optimization

A Special Issue of Journal of Marine Science and Engineering (ISSN 2077-1312) belonging to the section "Ocean Engineering".

Deadline for manuscript submissions: 25 September 2026 | Viewed by 1236

Editors

Prof. Dr. Zhaolong Han

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Guest Editor
School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China
Interests: offshore wind turbine; ocean energy; fluid–structure interaction; wind engineering
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jianhua Zhang

E-Mail Website
Guest Editor
College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, China
Interests: offshore wind turbines; offshore floating photovoltaic systems; offshore platform structures; structural dynamics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Zhanjie Li

E-Mail Website
Guest Editor
Department of Civil and Mechanical Engineering, SUNY Polytechnic Institute, Utica, NY, USA
Interests: offshore structures; structural optimization; structural design

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the design, analysis, and optimization of offshore structures. With the rapid expansion of offshore energy into deeper waters and harsher environments, structures are increasingly exposed to complex loading scenarios, including severe storms, large waves, and multi-hazard interactions. These challenges require improved understanding of structural response, reliability, and resilience. This Issue aims to bring together recent advances in structural performance, foundation systems, and innovative computational and data-driven methods. Contributions addressing both fundamental research and practical engineering applications are encouraged, particularly those that enhance the safety, efficiency, and robustness of offshore structure systems under extreme environmental conditions.

Offshore structures are increasingly deployed in harsh marine environments where extreme ocean conditions, such as hurricanes, large waves, and multi-hazard loading, govern structural safety and performance.

This Special Issue aims to advance the design, analysis, and optimization of offshore structures, with emphasis on resilience under extreme environmental conditions and practical engineering applications.

Recent growth in offshore platforms and turbines has exposed limitations in conventional design approaches, highlighting the need for an improved understanding of structural response and reliability.

Emerging studies focus on coupled system behavior, advanced numerical modeling, data-driven methods, and reliability-based design under extreme marine loading scenarios.

We welcome original research and review papers addressing structural performance, foundations, optimization, reliability, and innovative methods relevant to offshore structure systems in extreme conditions.

Prof. Dr. Zhaolong Han
Prof. Dr. Jianhua Zhang
Prof. Dr. Zhanjie Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • offshore structure
  • extreme ocean conditions
  • structural resilience
  • foundation systems
  • optimization
  • reliability analysis
  • soil–structure interaction
  • wave–structure interaction

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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22 pages, 21482 KB  
Article
Global Sensitivity Analysis of Platform-Mooring Responses for a 15 MW Semi-Submersible Floating Wind Turbine Based on PCE-Sobol and Spearman Methods
by Qiang Liu, Qunyi Wang, Xu Han, Xin Li, Chana Sinsabvarodom and Wei Shi
J. Mar. Sci. Eng. 2026, 14(16), 1457; https://doi.org/10.3390/jmse14161457 - 7 Aug 2026
Viewed by 330
Abstract
For large-scale floating offshore wind turbines, existing sensitivity studies have not fully addressed the combined effects of multiple uncertain input parameters on multiple output responses. Meanwhile, conventional Sobol indices quantify contribution magnitude but do not indicate effect direction. Based on the IEA 15 [...] Read more.
For large-scale floating offshore wind turbines, existing sensitivity studies have not fully addressed the combined effects of multiple uncertain input parameters on multiple output responses. Meanwhile, conventional Sobol indices quantify contribution magnitude but do not indicate effect direction. Based on the IEA 15 MW semi-submersible benchmark model, this study investigates the sensitivity of mooring tension and platform motion dynamic responses at a normal operating condition under power production. Integrated dynamic simulations were performed to generate response data. Eight uncertain parameters were considered, including the key mechanical and hydrodynamic coefficients of mooring lines as well as mass distribution and hydrodynamics-related key parameters for the platform. A polynomial chaos expansion surrogate model was used for the global sensitivity analysis, based on the Sobol index, Spearman coefficient, and a newly proposed modified Sobol index. The results indicate weak parameter interactions, with first-order Sobol indices dominating. The platform mass makes the largest contribution, with first-order Sobol indices approaching 1.0 for the mean tensions of all three mooring lines and 0.995 and 0.999 for the mean surge and heave displacements, respectively. The mooring line normal drag coefficient reaches a first-order Sobol index of 0.805 for the standard deviation of the upwind mooring line tension. The pitch response is influenced by multiple parameters. The Spearman coefficients confirmed the dominant parameters and identified their effect directions. By integrating variance contribution with effect direction, the modified Sobol index provides a more interpretable assessment of parameter effects. These findings can support parameter prioritization, mooring system design, and digital-twin model updating for floating offshore wind turbines. Full article
(This article belongs to the Special Issue Resilient Offshore Structures: Design, Analysis and Optimization)
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28 pages, 7408 KB  
Article
Effects of Second-Order Wave Forces on the Extreme Response Estimation of the TLP Offshore Wind Turbine Under Multi-Directional Wind-Wave Loads
by Jiahao Mu, Wei Shi, Linyang Cao, Jinghong Shang, Xu Han, Yang Yang, Liang Liu and Guangyuan Cheng
J. Mar. Sci. Eng. 2026, 14(10), 921; https://doi.org/10.3390/jmse14100921 - 16 May 2026
Viewed by 458
Abstract
As offshore wind energy advances into deeper waters, the dynamic response and safety assessment of tension leg platform (TLP) wind turbines under complex marine conditions have become focal research points. This study investigates a 15 MW TLP wind turbine, acquiring data on motion [...] Read more.
As offshore wind energy advances into deeper waters, the dynamic response and safety assessment of tension leg platform (TLP) wind turbines under complex marine conditions have become focal research points. This study investigates a 15 MW TLP wind turbine, acquiring data on motion responses, mooring tensions, and tower-base loads through time-domain analysis, with extreme value estimation conducted using the mean up-crossing rate method. The results indicate that under normal operating conditions, second-order wave forces significantly influence extreme response estimation. At an exceedance probability of 0.01, the second-order sum-frequency force increases the extreme tower base shear by 4.28% and the bending moment by 10.11% compared to the first-order-only case, while the difference-frequency force has a minor effect. Different wind-wave incidence angles cause distinct variations in turbine motion, with head-on incidence exciting the largest wave-frequency responses and lateral incidence producing relatively weaker excitation effects. Furthermore, the coupling effect between incident direction and second-order wave forces further amplifies extreme response risks. Therefore, it is essential to fully assess the prevailing wind-wave directions in the target sea area and consider the effects of second-order wave forces, especially the sum-frequency component, to ensure the long-term safe operation of TLP wind turbines under complex sea conditions. Full article
(This article belongs to the Special Issue Resilient Offshore Structures: Design, Analysis and Optimization)
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