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Collaborating Authors
Roger Basu & Associates Inc.
Optimum Design of Extra-Large Wind Turbine Monopile Covering Multiple Conditions
Bucchini, Matteo (BLOM Maritime Sp. z o.o.) | Yang, Zhiyong (7C Engineering LLC) | Basu, Roger (Roger Basu & Associates Inc.) | Wang, Aimin (Exmar Offshore Company) | Lee, Won Ho (Lloyd's Register) | Baxter, Gail (Retired) | Sielski, Robert (Retired) | Frontera, Raffaele (HMC BV) | Degrassi, Gabriele (ESTECO)
Offshore wind energy is developing rapidly in the United States, particularly off the East coast, which has an extensive continental shelf and where the water depths are such that monopile wind turbines founded directly on the seabed are the most attractive. In a previous paper, the authors demonstrated how the design of a monopole for a 15-MW turbine can be optimized to survive hurricane conditions using several commercially available design tools. This paper extends the study to address multiple loading conditions, including operational working conditions. To do that, different optimizations were run in parallel to find a global solution for multidisciplinary optimization. In the previous study, three independent design tools were used: Wind-plant Integrated System Design and Engineering Model (WISDEM) which was developed by the National Renewable Energy Laboratory (NREL), ANSYS Workbench, a finite element analysis program commonly used in the industry, and the ModeFRONTIER integration platform. To simulate the additional loading conditions, the OpenFAST software from NREL is now included in the workflow to estimate the loads in the different conditions examined.
A key ingredient in the design of structures and systems for the Blue Economy is engineering standards (used here as a blanket term for codes, Rules, recommended practices etc.). The focus in this paper is standards applicable to offshore wind, marine renewables, and open-ocean aquaculture. Standards for oil and gas offshore structures are used as a starting point. Developing and maintaining standards for any engineering discipline is always challenging and more so for rapidly developing sectors such as those associated with the Blue Economy. This paper presents a general discussion of engineering standards and the current state of standards for the Blue Economy. This includes a selective survey of relevant standards; the current and anticipated challenges and how much progress has been made towards developing the required documents.
- Europe > United Kingdom (1.00)
- Asia (0.93)
- North America > United States > Texas > Harris County > Houston (0.15)
- Government > Regional Government > North America Government > United States Government (1.00)
- Energy > Renewable > Wind (1.00)
- Energy > Renewable > Ocean Energy (1.00)
- (2 more...)
- North America > United States > North Atlantic Ocean > Newfoundland Basin (0.89)
- North America > Canada > North Atlantic Ocean > Newfoundland Basin (0.89)
- Europe > United Kingdom > North Sea (0.89)
- (3 more...)
The Path to The Blue Economy - Lessons from the Oil and Gas Industry
Basu, Roger I. (Roger Basu & Associates Inc.) | Sharman, Krish T. (University of Massachusetts Amherst)
The importance of the blue economy is growing. A key element of this is the transition from fossil-based energy to greener alternatives such as offshore wind, marine renewables and other sources of energy. The ocean has been a source of food for millennia but newer, more innovative methods, of offshore cultivation are being developed and deployed. The engineering experience gained in offshore oil and gas industry is finding application in these examples of engineering for the blue economy. The trends are outlined together with the challenges faced by the engineering community.
- Europe (1.00)
- Asia (1.00)
- South America (0.68)
- (3 more...)
- North America > United States > Gulf of Mexico > Central GOM > East Gulf Coast Tertiary Basin > Ewing Bank > Block 958 > Prince Field (0.99)
- North America > United States > Gulf of Mexico > Central GOM > East Gulf Coast Tertiary Basin > Ewing Bank > 1003 > Prince Field (0.99)
- North America > Canada > Newfoundland and Labrador > Newfoundland > North Atlantic Ocean > Atlantic Margin Basin > Grand Banks Basin > Jeanne d'Arc Basin > Hebron Field (0.99)
- Health, Safety, Environment & Sustainability > Sustainability/Social Responsibility > Sustainable development (1.00)
- Health, Safety, Environment & Sustainability > Environment (1.00)
- Facilities Design, Construction and Operation > Offshore Facilities and Subsea Systems > Platform design (1.00)
- (3 more...)
Multidisciplinary Design Optimization of Extra-Large Wind Turbine Monopile in Hurricane Conditions
Bucchini, Matteo (BLOM Maritime Sp. z o.o.) | Yang, Zhiyong (7C Engineering LLC) | Basu, Roger (Roger Basu & Associates Inc.) | Wang, Aimin (Exmar Offshore Company) | Lee, Won Ho (Lloyd's Register) | Baxter, Gail (Retired) | Sielski, Robert (Retired) | Frontera, Raffaele (C-Job Naval Architects) | Karr, Dale (University of Michigan)
Offshore wind energy is developing rapidly in the United States, particularly off the East coast, which has an extensive continental shelf and where the water depths are such that wind turbines founded directly on the seabed are the most attractive. Of the various foundation configurations that are feasible, it is the monopile that is expected to be most widely used. Another feature of the US East coast is that it is hurricane-prone region, which poses some unique challenges to designers. This paper summarizes research work undertaken to investigate how the role of modern optimization techniques can contribute to the design of such installation and does not establish any realistic project related implications. The project addresses the design of a 15 MW turbine, which represents the upper limit capacity of currently available wind turbines.
- Health, Safety, Environment & Sustainability > Environment (1.00)
- Data Science & Engineering Analytics > Information Management and Systems (1.00)
- Health, Safety, Environment & Sustainability > Sustainability/Social Responsibility > Sustainable development (0.47)
- Facilities Design, Construction and Operation > Offshore Facilities and Subsea Systems > Platform design (0.30)
Progress Through Failure - The Case of Ship and Offshore Structures
Basu, Roger I. (Roger Basu & Associates Inc.)
A significant component of progress in engineering is through failure. The focus of this paper is on ship and offshore structures although the observations are applicable to other engineering disciplines. There are many categories of sources of failure. The primary interest here is how the industry responds to broad and discrete technological changes that impact how ship and offshore structures are designed. Several examples of failures are described together with the shortcomings that led up to them. The lessons learned are synthesized in an effort to draw broad conclusions. The paper closes with recommendations on how the industry can improve its approach to dealing with change.
- North America > United States (1.00)
- Europe > Norway (0.68)
- Transportation > Marine (1.00)
- Transportation > Freight & Logistics Services > Shipping (1.00)
- Shipbuilding (1.00)
- (3 more...)
- Europe > Norway > North Sea > Central North Sea > South Viking Graben > Sleipner Field > Draupne Formation (0.99)
- Europe > United Kingdom > Atlantic Margin > West of Shetland > Faroe-Shetland Basin > Flett Basin > P 2596 > Block 207/1a > Victory Field > Victory Formation (0.89)
FEA Modeling Guidelines: Some Critical Problems in Analyzing Offshore Structures
Yang, Zhiyong (Keppel Floatec) | Bucchini, Matteo (Navalimpianti Spa) | Frontera, Raffaele (C-Job Naval Architects) | Basu, Roger (Roger Basu & Associates Inc.) | Baxter, Gail (Consultant) | Sielski, Robert (Consultant) | Karr, Dale (Universit of Michigan)
Structural finite element analysis (FEA) is routinely used in the design of modern ship and offshore structures. The benefits of FEA are apparent when used proficiently, but it can yield incorrect and misleading results when misused. There are certain types of errors in FEA that are unfortunately not that rare, but many of these errors can be avoided if clear and direct advice is provided to the analyst. SNAME Hull Structure Panel (HS3) aims to help analysts recognize the limitations of FEA tools and provide guidance on how to overcome them. A generic semisubmersible model is studied in order to demonstrate the simplification of the real structure in an FEA model, studying beam idealization in ship/offshore structure FEA, along with how to deal with the global and local loading. The effect of modeling geometry discrepancy is identified with numerical examples to illustrate the benefits of the guidelines. When a local model is built and boundary conditions are to be applied, displacement from the global model is often used to transfer the global loads. The difference between a detailed shell local model and the simplified coarse beam/shell global model requires the use of so-called rigid elements, such as RBE2/RBE3 in the commercially-available program ANSYS, which was used in developing these guidelines. Other than displacement, the local model may be analyzed using force boundary conditions obtained directly from the global model beam element internal forces. While the two methods are acceptable in the applications, there are issues with each of the methods. Theoretical formulation is used to show that either of the choices of boundary conditions could be established in order to solve the basic equation. However, a judicious process to deal with the boundary conditions will help analysts determine the best approach. An investigation of the effects of different methods is shown to illustrate the consequences. A summary of guidelines to these particular problems is presented. Future work is also discussed
- Europe (1.00)
- North America > United States > Michigan (0.28)
The Interaction of Ships with Wind - Current Practice and Future Possibilities
Basu, Roger I. (Roger Basu & Associates Inc.)
Ships interact with the environment in several ways. The focus in this paper is on how ships interact with the wind and how this is treated in design. It is generally sufficient in most cases to model wind force as a static load. However, there may be circumstances where a more detailed description of the wind is appropriate. Some examples discussed include stability under transverse winds, aircraft flight deck operations and wind resistance. The paper summarizes key properties of the wind and recent research related to some key windship interactions. This includes discussion of the challenges and possible remedies.
- North America > United States (1.00)
- Europe (1.00)
- North America > Canada > Ontario > Toronto (0.28)
- Overview (1.00)
- Research Report > New Finding (0.93)
- Transportation > Marine (1.00)
- Transportation > Air (1.00)
- Energy > Oil & Gas > Upstream (1.00)
- (4 more...)
Towards Better Ship Structures: Developing Guidance for the Designer
Basu, Roger I. (Roger Basu & Associates Inc.) | Kendrick, Andrew (VARD Marine)
A project to develop guidance useful for the structural designer, especially those in the early stages of their career, is being considered by the SNAME Hull Structure Committee. There are numerous relevant sources of information that can help designers develop sound ship structures, but the guidance provided is generally fragmented and often just one part of the design guidance provided. An aspect usually missing in these sources is the clear exposition of a fundamental understanding of structural behaviour which is crucial to good design. The purpose of the guidance envisaged is to provide explicit guidance organized by these structural concepts. The paper provides a summary of the structural design process, describes the key structural concepts, summarizes the information and understanding that the typical young designer brings to her or his job, and outlines the kind of guidance that the authors believe will contribute to developing proficient structural designers and hence to better ship structures.
- North America > United States (0.46)
- North America > Canada (0.28)