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Over the last few years, enormous efforts have been made to improve the energy sector by enhancing sustainability. The application of sustainable design approaches, the selection of low-impact materials, waste recycling and reuse, among others, are all factors in the construction of offshore platforms. The examination of offshore platform sustainability performance, including the creation of quantification methodologies, indicators, and other metrics, has also been extensively researched around the world. Since energy is used in nearly every area of modern economies, it is regarded as a strategic asset. Apart from renewable generation sources, natural gas and oil are the most common fuels used to generate electricity. It's no surprise that recent challenges from commodity, stock, and credit markets, which have put natural gas and oil companies' operations in risk, have been a major topic of discussion in the academic literature, particularly in recent decades, when both markets have changed at an unprecedented rate due to changes in both supply technologies and energy demand characteristics. Natural gas and crude oil are normally competitors in the creation of power, but they are also alternatives for one another in consumption, resulting in price correlations. We welcome articles that examine the design and analysis of offshore structures, sustainable development, wind turbine design, oil and gas platform design, market reviews, literature reviews and research papers on the asset standpoint to be submitted to this special issue of Sustainability. We encourage research into the characteristics of different components of the oil and gas industry, from design, exploration and transfer, and related issues like oil spillage, oil recovery, carbon capture and geotechnical survey. Also, the economics (oil prices) in commodities markets, stock market prices for oil and gas companies, capital structure choices and funding alternatives used in the two sectors, and spillover effects between the two markets and from (to) these markets to (from) other financial markets is welcomed. Papers examining the geopolitical dynamics that impact natural gas and oil markets, marine law cases involving the oil & gas industry, oil & gas policies and legislations, as well as papers addressing the sector's future difficulties and uncertainties, from a variety of disciplinary perspectives, are also encouraged. This special issue of Sustainability aspires to become a future reference point for chronicling oil and gas industry, sustainable development, recent transformations and future paths. Novel designs/developments like a floating stadium, floating airports, floating offices, floating platforms and floating houses are part of sustainable developments, and can also be submitted. Hence, this Special Issue on the ���Analysis and Sustainable development of offshore structures���. The main goal of this special issue is to address the key challenges, thereby promoting research on offshore structures., Over the last few years, enormous efforts have been made to improve the energy sector by enhancing sustainability. The application of sustainable design approaches, the selection of low-impact materials, waste recycling and reuse, among others, are all factors in the construction of offshore platforms. The examination of offshore platform sustainability performance, including the creation of quantification methodologies, indicators, and other metrics, has also been extensively researched around the world. We welcome articles that examine the design and analysis of offshore structures, sustainable development, wind turbine design, oil and gas platform design, market reviews, literature reviews and research papers on the asset standpoint to be submitted to this special issue. We encourage research into the characteristics of different components of the oil and gas industry, from design, exploration and transfer, and related issues like oil spillage, oil recovery, carbon capture and geotechnical survey. The main goal of this special issue is to address the key challenges, thereby promoting research on offshore structures. I encourage you to contribute a research or comprehensive review article for consideration for publication in Sustainability, an international Open Access journal which provides an advanced forum for research findings in areas related to sustainability and sustainable development. The journal publishes original research articles, reviews, conference proceedings (peer-reviewed full articles) and communications. I am confident you will find the journal contributes to enhancing understanding of sustainability and fostering initiatives and applications of sustainability-based measures and activities. The submission deadline is 15th December, 2022.

Presented at 16th Deep Sea Offshore Wind R&D conference, Trondheim, Norway, 16–18 January, 2019 In recent years, there is a great need to develop offshore wind energy on a global scale due to the greenhouse effect and energy crisis. Great efforts have been devoted to developing a reliable floating offshore wind energy technology to take advantage of the large amount of wind energy resources that exist in deep water. In this paper, a novel concept of a floating offshore wind turbine (FOWT), namely, the modified V-shaped semi-floating with heave plate, is proposed, and its hydrodynamic characteristics are studied. A numerical model based on ANSYS/AQWA is used to investigate the dynamic motion, response characteristics and mooring performance of the new concept. Moreover, the response amplitude operators (RAOs) of the different response quantities are also elaborated. A comparative study of the dynamic response of the different response quantities of the modified V-shape and original V-shaped semi-floating is carried out for operational environmental conditions. It is found that the modified V-shape semi-floating shows relatively better performance in platform motion and mooring line response.

Operations and installation on offshore wind and especially floating are complex and difficult actions due to site accessibility and equipment availability. In this regard, digitalization is disrupting the wind section thanks to the development of advanced sensors, automated equipment, computational power, among other. All these allow to optimize and simplify different parts of the offshore wind power plant development (i.e. design, planning, installation, O&M, etc.). This fact is of special interest on maintenance, since the early detection of failures or malfunctions lead to reduced costly corrective maintenance. This paper presents a literature review of current state-of-the-art on the application of digitalization activities which can be applied for floating wind, including typical component failures, monitoring techniques and advanced digital tools as Digital Twin concept and Building Information Models (BIM). Finally, the review paper provides an analysis of existing gaps, needs and challenges of the sector to provide guides on research and innovation to foster offshore wind sector. The research leading to these results has received funding from the European Union’s H2020 Programme under Grant Agreement n◦ 815083 – Corewind