2024
Wang, Gil; Bar, Daniel; Schreier, Sebastian
The potential of end-of-life ships as a floating seawall and the methodical use of gap resonance for wave attenuation Journal Article
In: Ocean Engineering, vol. 298, pp. 117246, 2024, ISSN: 0029-8018.
@article{WANG2024117246,
title = {The potential of end-of-life ships as a floating seawall and the methodical use of gap resonance for wave attenuation},
author = {Gil Wang and Daniel Bar and Sebastian Schreier},
url = {https://www.sciencedirect.com/science/article/pii/S0029801824005833},
doi = {https://doi.org/10.1016/j.oceaneng.2024.117246},
issn = {0029-8018},
year = {2024},
date = {2024-01-01},
urldate = {2024-01-01},
journal = {Ocean Engineering},
volume = {298},
pages = {117246},
abstract = {This study examines the potential of a new type of floating seawall, made up of retired large-scale oceangoing vessels, to be used in open water and exposed coastal areas. The main objectives of the research are to assess the effectiveness of the floating seawall concept, to determine the contribution of the gap resonance to wave attenuation, and to compare the results of physical tests with those obtained numerically using ANSYS-AQWA. The use of end-of-life ships in this way provides a unique opportunity to extend their life cycle and reduce the environmental and human health risks associated with the current practice of shipbreaking. The research focuses on a multimodule floating seawall configuration, where each module is composed of two hulls that are rigidly connected side by side, with a small gap to induce gap resonance. The results suggest that end-of-life ships can be used as a resource for the construction of floating seawalls for various marine applications. Furthermore, the results demonstrate the positive influence of the gap resonance on the wave attenuation capacity of the seawall, as well as the limitations of the numerical tool in providing realistic values in this region.},
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pubstate = {published},
tppubtype = {article}
}
This study examines the potential of a new type of floating seawall, made up of retired large-scale oceangoing vessels, to be used in open water and exposed coastal areas. The main objectives of the research are to assess the effectiveness of the floating seawall concept, to determine the contribution of the gap resonance to wave attenuation, and to compare the results of physical tests with those obtained numerically using ANSYS-AQWA. The use of end-of-life ships in this way provides a unique opportunity to extend their life cycle and reduce the environmental and human health risks associated with the current practice of shipbreaking. The research focuses on a multimodule floating seawall configuration, where each module is composed of two hulls that are rigidly connected side by side, with a small gap to induce gap resonance. The results suggest that end-of-life ships can be used as a resource for the construction of floating seawalls for various marine applications. Furthermore, the results demonstrate the positive influence of the gap resonance on the wave attenuation capacity of the seawall, as well as the limitations of the numerical tool in providing realistic values in this region.
Wang, Gil; Bar, Daniel; Hooimeijer, Fransje; Schreier, Sebastian
Floating Urban Development—Sustainable Growth and Affordable Housing Proceedings Article
In: Ikoma, Tomoki; Tabeta, Shigeru; Lim, Soon Heng; Wang, Chien Ming (Ed.): Proceedings of the Third World Conference on Floating Solutions, pp. 81–100, Springer Nature Singapore, Singapore, 2024, ISBN: 978-981-97-0495-8.
@inproceedings{10.1007/978-981-97-0495-8_6,
title = {Floating Urban Development—Sustainable Growth and Affordable Housing},
author = {Gil Wang and Daniel Bar and Fransje Hooimeijer and Sebastian Schreier},
editor = {Tomoki Ikoma and Shigeru Tabeta and Soon Heng Lim and Chien Ming Wang},
doi = {https://doi.org/10.1007/978-981-97-0495-8_6},
isbn = {978-981-97-0495-8},
year = {2024},
date = {2024-01-01},
urldate = {2024-01-01},
booktitle = {Proceedings of the Third World Conference on Floating Solutions},
pages = {81–100},
publisher = {Springer Nature Singapore},
address = {Singapore},
abstract = {Driven by population growth and rural migration toward the cities, the demand for affordable housing continues to increase. However, due to the scarcity of urban development space—especially in coastal areas, the supply is limited. As increasing land availability is one of the most effective ways to reduce real estate costs, this interdisciplinary research explores the alternative of urban expansion toward the adjacent marine environment of coastal cities. It focuses on floating residential dwellings from both technological and urban planning perspective, aiming to include the waterfront of coastal cities as viable, sustainable, and affordable alternative for urban development. The research takes on one of the most expensive cities in the world, Tel Aviv-Yafo, as a case study for increasing the supply of affordable housing in addition to vital sustainable future growth in the adjacent marine environment.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Driven by population growth and rural migration toward the cities, the demand for affordable housing continues to increase. However, due to the scarcity of urban development space—especially in coastal areas, the supply is limited. As increasing land availability is one of the most effective ways to reduce real estate costs, this interdisciplinary research explores the alternative of urban expansion toward the adjacent marine environment of coastal cities. It focuses on floating residential dwellings from both technological and urban planning perspective, aiming to include the waterfront of coastal cities as viable, sustainable, and affordable alternative for urban development. The research takes on one of the most expensive cities in the world, Tel Aviv-Yafo, as a case study for increasing the supply of affordable housing in addition to vital sustainable future growth in the adjacent marine environment.
2021
Wang, Gil; Rosenfeld, Yehiel; Drimer, Nitai; Goldfeld, Yiska
Occupant comfort analysis for rigid floating structures – methodology and design assessment for offshore dwelling module Journal Article
In: Ships and Offshore Structures, vol. 16, no. 2, pp. 184-199, 2021.
@article{doi:10.1080/17445302.2020.1718267,
title = {Occupant comfort analysis for rigid floating structures – methodology and design assessment for offshore dwelling module},
author = {Gil Wang and Yehiel Rosenfeld and Nitai Drimer and Yiska Goldfeld},
url = {https://doi.org/10.1080/17445302.2020.1718267},
doi = {10.1080/17445302.2020.1718267},
year = {2021},
date = {2021-01-01},
journal = {Ships and Offshore Structures},
volume = {16},
number = {2},
pages = {184-199},
publisher = {Taylor & Francis},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
2020
Wang, Gil; Drimer, Nitai; Goldfeld, Yiska
Modular floating structures (MFS) for offshore dwelling a hydrodynamic analysis in the frequency domain Journal Article
In: Ocean Engineering, vol. 216, pp. 107996, 2020, ISSN: 0029-8018.
@article{WANG2020107996,
title = {Modular floating structures (MFS) for offshore dwelling a hydrodynamic analysis in the frequency domain},
author = {Gil Wang and Nitai Drimer and Yiska Goldfeld},
url = {https://www.sciencedirect.com/science/article/pii/S0029801820309458},
doi = {https://doi.org/10.1016/j.oceaneng.2020.107996},
issn = {0029-8018},
year = {2020},
date = {2020-01-01},
journal = {Ocean Engineering},
volume = {216},
pages = {107996},
abstract = {The concept of Modular Floating Structures (MFS) offers a unique avenue to explore new and sustainable ways for addressing issues of coastal urbanization and sea level rise in the proximity of coastal cities. This concept is easily implemented in calm waters without the interference of waves. Yet, its implementation in open water, poses greater challenges, particularly in terms of habitability and comfort. The current study examines the feasibility of the concept in two locations: in mild sea zone near Singapore and in open water conditions at the Eastern Mediterranean Sea. Both conditions are examined in operational and extreme storms. It is shown that the MFS configuration can attenuate incident waves of short periods. This reduces the motion amplitudes of the inner modules with respect to the exterior modules facing the waves. It is also presented that during extreme storms, the chosen configuration is less effective, and the motion amplitudes of all modules within the MFS fabric are almost identical. To further increase the acceptable sea states, the study proposes a unique floating seawall design, which provides a substantial wave reduction in long wave periods. The study presents the efficiency of the new configuration in operational weather and a 100-years storm.},
keywords = {},
pubstate = {published},
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The concept of Modular Floating Structures (MFS) offers a unique avenue to explore new and sustainable ways for addressing issues of coastal urbanization and sea level rise in the proximity of coastal cities. This concept is easily implemented in calm waters without the interference of waves. Yet, its implementation in open water, poses greater challenges, particularly in terms of habitability and comfort. The current study examines the feasibility of the concept in two locations: in mild sea zone near Singapore and in open water conditions at the Eastern Mediterranean Sea. Both conditions are examined in operational and extreme storms. It is shown that the MFS configuration can attenuate incident waves of short periods. This reduces the motion amplitudes of the inner modules with respect to the exterior modules facing the waves. It is also presented that during extreme storms, the chosen configuration is less effective, and the motion amplitudes of all modules within the MFS fabric are almost identical. To further increase the acceptable sea states, the study proposes a unique floating seawall design, which provides a substantial wave reduction in long wave periods. The study presents the efficiency of the new configuration in operational weather and a 100-years storm.
2019
Wang, Gil; Goldfeld, Yiska; Drimer, Nitai
Expanding coastal cities – Proof of feasibility for modular floating structures (MFS) Journal Article
In: Journal of Cleaner Production, vol. 222, pp. 520-538, 2019, ISSN: 0959-6526.
@article{WANG2019520,
title = {Expanding coastal cities – Proof of feasibility for modular floating structures (MFS)},
author = {Gil Wang and Yiska Goldfeld and Nitai Drimer},
url = {https://www.sciencedirect.com/science/article/pii/S0959652619306900},
doi = {https://doi.org/10.1016/j.jclepro.2019.03.007},
issn = {0959-6526},
year = {2019},
date = {2019-01-01},
journal = {Journal of Cleaner Production},
volume = {222},
pages = {520-538},
abstract = {Land scarcity in and around coastal cities is a growing problem in both industrialized and developing nations. The lack of development areas increases the tension between infrastructure needs, urban needs and nature – impacting both growth and quality of life. This study advocates that floating structures can offer a unique avenue to explore new and sustainable ways of addressing these issues. Recognizing that no comprehensive analysis or study on the legal requirements needed for the realization of such projects has yet been conducted, the study's first aim is to define the required design guidelines by synthesizing statutory requirements, building codes and international regulations. From a statutory perspective, these encompass two disciplines: civil engineering and naval architecture. To this end, a preliminary design of a Modular Floating Structures (MFS) module is presented, reconciling the design requirements of the two disciplines, in order to proof the feasibility of the MFS technology for urban use offshore. The study mainly focuses on structural and safety aspects, and sheds light on other crucial factors for offshore dwelling feasibility, such as occupant comfort.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Land scarcity in and around coastal cities is a growing problem in both industrialized and developing nations. The lack of development areas increases the tension between infrastructure needs, urban needs and nature – impacting both growth and quality of life. This study advocates that floating structures can offer a unique avenue to explore new and sustainable ways of addressing these issues. Recognizing that no comprehensive analysis or study on the legal requirements needed for the realization of such projects has yet been conducted, the study's first aim is to define the required design guidelines by synthesizing statutory requirements, building codes and international regulations. From a statutory perspective, these encompass two disciplines: civil engineering and naval architecture. To this end, a preliminary design of a Modular Floating Structures (MFS) module is presented, reconciling the design requirements of the two disciplines, in order to proof the feasibility of the MFS technology for urban use offshore. The study mainly focuses on structural and safety aspects, and sheds light on other crucial factors for offshore dwelling feasibility, such as occupant comfort.
