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Dynamic Instability in Offshore Structures
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Dynamic Instability in Offshore Structures

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 18564

Special Issue Editors

Dr. Josh Davidson

E-Mail Website
Guest Editor
Fluid Mechanics, Budapest University of Technology and Economics, Budapest, Hungary
Interests: fluid–structure interaction; hydrodynamics; numerical analysis; offshore renewable energy
Dr. Roberto Galeazzi

E-Mail Website
Guest Editor
Technical University of Denmark, Kongens Lyngby, Denmark
Interests: condition monitoring; nonlinear adaptive control and estimation; fault-tolerant and reconfigurable control; guidance, navigation and control of marine crafts
Dr. Tamas Kalmar-Nagy

E-Mail Website
Guest Editor
Budapest University of Technology and Economics, Budapest, Hungary
Interests: nonlinear dynamics; time-delay systems; hysteretic systems; energy transfer; coupled oscillators; trajectory generation

Special Issue Information

Dear Colleagues,

Floating structures operating in the offshore environment are exposed to harsh conditions that may determine the occurrence of dynamic instability phenomena, such as parametric resonance, surf riding, and broaching. The large amplitude motions, resulting from dynamic instability, can have severe consequences for the safety and survivability of the structures and should, therefore, be mitigated and, where possible, avoided. Different technological solutions can be developed to achieve this, which range from novel designs of ships, offshore platforms, fish farms etc. to diminish the susceptibility risk, to advanced coupled condition monitoring and control systems to lessen the effects. However, in some cases, such as marine renewable energy systems, controlling the dynamic instability might be leveraged for increased system performance.

This Special Issue brings together contributions from different disciplines within marine engineering and technology, where the dynamic instability of offshore structures is encountered, to showcase lessons learned and highlight methods and solutions that may be transferrable between the various application areas. Contributions in modeling, analysis, control, and monitoring are welcomed.

Dr. Josh Davidson
Dr. Roberto Galeazzi
Dr. Tamas Kalmar-Nagy
Guest Editor

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 100 words) can be sent to the Editorial Office for announcement on this website.

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-blind 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 monthly 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

  • Dynamic instability
  • parametric resonance
  • broaching
  • surf riding
  • nonlinear dynamics
  • hydrodynamics
  • ships
  • spar platforms
  • wave energy conversion
  • condition monitoring
  • control systems
  • Rogue waves

Published Papers (7 papers)

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Research

38 pages, 3300 KiB  
Article
Implementation of the IMO Second Generation Intact Stability Guidelines
by Kyle E. Marlantes, Sungeun (Peter) Kim and Lucas A. Hurt
J. Mar. Sci. Eng. 2022, 10(1), 41; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse10010041 - 31 Dec 2021
Cited by 13 | Viewed by 3402
Abstract
This paper provides a discussion of the technical and theoretical ambiguities, requirements, and limitations to develop a practical implementation of the IMO Second Generation Intact Stability criteria. This discussion is the result of industry collaboration, where two implementations of the guidelines were developed [...] Read more.
This paper provides a discussion of the technical and theoretical ambiguities, requirements, and limitations to develop a practical implementation of the IMO Second Generation Intact Stability criteria. This discussion is the result of industry collaboration, where two implementations of the guidelines were developed jointly, albeit independently. Both implementations were then used to assess four sample cases: C11 container ship, KRISO container ship (KCS), barge, and fishing vessel, for which the detailed particulars and results are given. Conclusions on the practicalities of use, a comparison of the results, and suggestions on how the criteria might be integrated into a workflow are also given. Full article
(This article belongs to the Special Issue Dynamic Instability in Offshore Structures)
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24 pages, 1225 KiB  
Article
Modelling of Parametric Resonance for Heaving Buoys with Position-Varying Waterplane Area
by János Lelkes, Josh Davidson and Tamás Kalmár-Nagy
J. Mar. Sci. Eng. 2021, 9(11), 1162; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse9111162 - 22 Oct 2021
Cited by 1 | Viewed by 1525
Abstract
Exploiting parametric resonance may enable increased performance for wave energy converters (WECs). By designing the geometry of a heaving WEC, it is possible to introduce a heave-to-heave Mathieu instability that can trigger parametric resonance. To evaluate the potential of such a WEC, a [...] Read more.
Exploiting parametric resonance may enable increased performance for wave energy converters (WECs). By designing the geometry of a heaving WEC, it is possible to introduce a heave-to-heave Mathieu instability that can trigger parametric resonance. To evaluate the potential of such a WEC, a mathematical model is introduced in this paper for a heaving buoy with a non-constant waterplane area in monochromatic waves. The efficacy of the model in capturing parametric resonance is verified by a comparison against the results from a nonlinear Froude–Krylov force model, which numerically calculates the forces on the buoy based on the evolving wetted surface area. The introduced model is more than 1000 times faster than the nonlinear Froude–Krylov force model and also provides the significant benefit of enabling analytical investigation techniques to be utilised. Full article
(This article belongs to the Special Issue Dynamic Instability in Offshore Structures)
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30 pages, 21731 KiB  
Article
Wave Propagation Studies in Numerical Wave Tanks with Weakly Compressible Smoothed Particle Hydrodynamics
by Samarpan Chakraborty and Balakumar Balachandran
J. Mar. Sci. Eng. 2021, 9(2), 233; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse9020233 - 22 Feb 2021
Cited by 4 | Viewed by 2539
Abstract
Generation and propagation of waves in a numerical wave tank constructed using Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) are considered here. Numerical wave tank simulations have been carried out with implementations of different Wendland kernels in conjunction with different numerical dissipation schemes. The [...] Read more.
Generation and propagation of waves in a numerical wave tank constructed using Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) are considered here. Numerical wave tank simulations have been carried out with implementations of different Wendland kernels in conjunction with different numerical dissipation schemes. The simulations were accelerated by using General Process Graphics Processing Unit (GPGPU) computing to utilize the massively parallel nature of the simulations and thus improve process efficiency. Numerical experiments with short domains have been carried out to validate the dissipation schemes used. The wave tank experiments consist of piston-type wavemakers and appropriate passive absorption arrangements to facilitate comparisons with theoretical predictions. The comparative performance of the different numerical wave tank experiments was carried out on the basis of the hydrostatic pressure and wave surface elevations. The effect of numerical dissipation with the different kernel functions was also studied on the basis of energy analysis. Finally, the observations and results were used to arrive at the best possible numerical set up for simulation of waves at medium and long distances of propagation, which can play a significant role in the study of extreme waves and energy localizations observed in oceans through such numerical wave tank simulations. Full article
(This article belongs to the Special Issue Dynamic Instability in Offshore Structures)
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22 pages, 880 KiB  
Article
Dynamic Analysis of Suction Stabilized Floating Platforms
by Susheelkumar C. Subramanian, Michaela Dye and Sangram Redkar
J. Mar. Sci. Eng. 2020, 8(8), 587; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse8080587 - 06 Aug 2020
Cited by 10 | Viewed by 3136
Abstract
The occurrence of parametric resonance due to the time varying behavior of ocean waves could lead to catastrophic damages to offshore structures. A stable structure that could withstand the wave perturbations is quintessential to operate in such a harsh environment. In this work, [...] Read more.
The occurrence of parametric resonance due to the time varying behavior of ocean waves could lead to catastrophic damages to offshore structures. A stable structure that could withstand the wave perturbations is quintessential to operate in such a harsh environment. In this work, the authors detail the relevance of a Suction Stabilized Float (SSF) or a Suction Stabilized Floating platform towards such an application. A generic design of a symmetrically shaped float structure along with its inherent stabilization behavior is discussed. Furthermore, the authors extend their prior research on this topic towards modelling the dynamics of SSF and perform stability analysis. The authors demonstrate the dynamical characteristics of SSF analytically using Floquet theory and Normal Forms technique, in this work. Additionally, the simulation results are verified and validated with the numerical methods. Full article
(This article belongs to the Special Issue Dynamic Instability in Offshore Structures)
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17 pages, 1167 KiB  
Article
Nonlinear Dynamic and Kinematic Model of a Spar-Buoy: Parametric Resonance and Yaw Numerical Instability
by Giuseppe Giorgi, Josh Davidson, Giuseppe Habib, Giovanni Bracco, Giuliana Mattiazzo and Tamás Kalmár-Nagy
J. Mar. Sci. Eng. 2020, 8(7), 504; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse8070504 - 09 Jul 2020
Cited by 20 | Viewed by 2915
Abstract
Mathematical models are essential for the design and control of offshore systems, to simulate the fluid–structure interactions and predict the motions and the structural loads. In the development and derivation of the models, simplifying assumptions are normally required, usually implying linear kinematics and [...] Read more.
Mathematical models are essential for the design and control of offshore systems, to simulate the fluid–structure interactions and predict the motions and the structural loads. In the development and derivation of the models, simplifying assumptions are normally required, usually implying linear kinematics and hydrodynamics. However, while the assumption of linear, small amplitude motion fits traditional offshore problems, in normal operational conditions (it is desirable to stabilize ships, boats, and offshore platforms), large motion and potential dynamic instability may arise (e.g., harsh sea conditions). Furthermore, such nonlinearities are particularly evident in wave energy converters, as large motions are expected (and desired) to enhance power extraction. The inadequacy of linear models has led to an increasing number of publications and codes implementing nonlinear hydrodynamics. However, nonlinear kinematics has received very little attention, as few models yet consider six degrees of freedom and large rotations. This paper implements a nonlinear hydrodynamic and kinematic model for an archetypal floating structure, commonplace in offshore applications: an axisymmetric spar-buoy. The influence of nonlinear dynamics and kinematics causing coupling between modes of motion are demonstrated. The nonlinear dynamics are shown to cause parametric resonance in the roll and pitch degrees of freedom, while the nonlinear kinematics are shown to potentially cause numerical instability in the yaw degree of freedom. A case study example is presented to highlight the nonlinear dynamic and kinematic effects, and the importance of including a nominal restoring term in the yaw DoF presented. Full article
(This article belongs to the Special Issue Dynamic Instability in Offshore Structures)
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17 pages, 1110 KiB  
Article
Delayed Fuzzy Output Feedback H∞ Control for Offshore Structures
by Hua-Nv Feng, Bao-Lin Zhang, Qing Li and Gong-You Tang
J. Mar. Sci. Eng. 2020, 8(6), 434; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse8060434 - 12 Jun 2020
Cited by 8 | Viewed by 1550
Abstract
Vibration damping of jacket platforms is among the significant issues in marine science and engineering, and the design of active vibration control schemes is very important to ensure the stability and safety of the jacket platforms against external loadings. This paper provides three [...] Read more.
Vibration damping of jacket platforms is among the significant issues in marine science and engineering, and the design of active vibration control schemes is very important to ensure the stability and safety of the jacket platforms against external loadings. This paper provides three fuzzy output feedback H ∞ controllers of the jacket platforms for irregular wave forces. By considering time-varying masses of jacket platforms, a Takagi-Sugeno (T-S) fuzzy dynamic model of the structure is established. Then fuzzy output feedback H ∞ control schemes are developed via using output signals of the platform with current and/or are delayed. Several existence conditions of fuzzy output feedback H ∞ controllers are derived. Simulation results demonstrate that the fuzzy output feedback H ∞ control strategies are remarkable to suppress the vibration of structure. Moreover, by choosing proper delayed output information of the system, the presented delayed fuzzy output feedback H ∞ control schemes outperform the conventional fuzzy output feedback H ∞ control approach. Full article
(This article belongs to the Special Issue Dynamic Instability in Offshore Structures)
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21 pages, 8062 KiB  
Article
A Framework of Numerically Evaluating a Maneuvering Vessel in Waves
by Zhitian Xie, Jeffrey Falzarano and Hao Wang
J. Mar. Sci. Eng. 2020, 8(6), 392; https://0-doi-org.brum.beds.ac.uk/10.3390/jmse8060392 - 29 May 2020
Cited by 4 | Viewed by 2022
Abstract
Maneuvering in waves is a hydrodynamic phenomenon that involves both seakeeping and maneuvering problems. The environmental loads, such as waves, wind, and current, have a significant impact on a maneuvering vessel, which makes it more complex than maneuvering in calm water. Wave effects [...] Read more.
Maneuvering in waves is a hydrodynamic phenomenon that involves both seakeeping and maneuvering problems. The environmental loads, such as waves, wind, and current, have a significant impact on a maneuvering vessel, which makes it more complex than maneuvering in calm water. Wave effects are perhaps the most important factor amongst these environmental loads. In this research, a framework has been developed that simultaneously incorporates the maneuvering and seakeeping aspects that includes the hydrodynamics effects corresponding to both. To numerically evaluate the second-order wave loads in the seakeeping problem, a derivation has been presented with a discussion and the Neumann-Kelvin linearization has been applied to consider the wave drift damping effect. The maneuvering evaluations of the KVLCC (KRISO Very Large Crude Carrier) and KCS (KRISO Container Ship) models in calm water and waves have been conducted and compared with the model tests. Through the comparison with the experimental results, this framework had been proven to provide a convincing numerical prediction of the horizontal motions for a maneuvering vessel in waves. The current framework can be extended and contribute to the IMO (International Maritime Organization) standards for determining the minimum propulsion power to maintain the maneuverability of vessels in adverse conditions. Full article
(This article belongs to the Special Issue Dynamic Instability in Offshore Structures)
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