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Keywords: frequency
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Proceedings Papers
Enhancing the Hydrodynamic Modeling of Spar-Type Floating Offshore Wind Turbines: Incorporating Vortex-Induced Vibrations in OpenFAST
Available to PurchaseTaeksang Kim, Jeongbin Park, Seymour M.J. Spence, Yulin Pan, Ayumi Fujisaki-Manome, Jeremy David Bricker
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-029
... are compared: one assuming a stationary platform and the other allowing for platform motion through relative velocity coupling. Results show that VIV introduces multi-frequency oscillations in both hydrodynamic force and platform sway response, with amplitudes increasing with current speed. These findings...
Proceedings Papers
Effect of Tower Flexibility on the Global Performance of a TLP Floating Wind Turbine
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-030
...) investigate a large-scale Braceless-TLP FOWT designed for intermediate water depths of 60 meters, the study demonstrates the feasibility of installing TLP FOWTs in moderate water depths through comprehensive numerical analysis. social responsibility tower flexibility frequency mathematics...
Proceedings Papers
Operational State Analysis of Semi-Submersible Floating Wind Turbines Based on Measured Data
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-034
...). sustainable development wind turbine wind turbine platform sustainability platform wind speed typhoon condition simulation model inclination angle artificial intelligence turbine inclination frequency power generation inclination social responsibility machine learning wave height operation...
Proceedings Papers
Numerical Analysis of Effects of Wind-Wave-Current Interactions on the Performance of Floating Offshore Wind Turbine
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-043
... is amplified under wind-wave-current interactions. In PSD analysis, there are three frequency bands: low, medium, and high, which are dominated by natural frequencies, harmonics of wave and rotor, respectively. Based on Liutex-Omega vortex identification method, it can be observed that the wake fluctuation...
Proceedings Papers
Numerical Investigation on Hydrodynamic Characteristics of a Tuned Liquid Multi-Column Damper with Orifice Plates
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-048
... to mitigate the motions of the floating foundation, but conventional TLMCDs work best only in a narrow frequency range. Installing orifice plates inside a TLMCD may be able to extend the optimum frequency range but the hydrodynamic characteristics of TLMCDs with orifice plates remain relatively unexplored...
Proceedings Papers
Damage Detection and Localization in CFRP-Reinforced Steel Structures Combining Ultrasonic Guided Wave Nonlinear and Modified Probabilistic Imaging Method
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-478
... of surface and internal defects in structures (Yue et al., 2024; Zhang et al., 2024). This is particularly advantageous for the inspection and monitoring of large plate and pipeline structures. impact damage frequency reference signal steel structure artificial intelligence di value cfrp...
Proceedings Papers
Numerical Investigation on Nonlinear Hydroelastic Responses of a Container Ship by CFD-FEA Coupling Method
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-491
... simulations are carried out to characterise the ship hydroelasticity under various wave-to-ship length ratios. Attention is also placed on the effects of springing and whipping phenomena, where the two-node vibration modal frequency is observed dominant over the whole ship with pronounced higher-order...
Proceedings Papers
2D and 3D Dropped Object Risk Assessment Method on Subsea Installations
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-512
... the target failure frequency. Aanesland (1987) is among the first to demonstrated both experimentally and numerically the falling trajectory of dropped objects in water. Which is adopted by DNV (2021a) into idealized object categories and corresponding excursion normal distributions. Various recent efforts...
Proceedings Papers
Research on the Vulnerable Distance of Bridge-Ship Collision in Equipment Failure Condition
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-540
... trajectory design risk management ship journal collision collapse probability artificial intelligence ship collision frequency risk and uncertainty assessment ship collision risk bridge equipment failure jin tang bridge accident collision probability bridge pier vulnerable distance...
Proceedings Papers
Research on Identification of Overboard Personnel Based on Attitude Information
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-547
... ABSTRACT With the increasing frequency of maritime activities, the risk of accidental falls into water has also risen. To minimize such incidents and reduce the potential loss of life and property, it is crucial to promptly detect when a person has fallen into the water thereby increasing...
Proceedings Papers
Analysis of Added Resistance's Components in Frequency Domain Based on Havelock Type Translating Pulsating Source
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-550
... ABSTRACT When a ship sails in the actual sea conditions, it is not only necessary to overcome the static water resistance. The time domain method is time-consuming and can not meet the requirements of ship lines optimization. The pressure distribution obtained by frequency domain method does...
Proceedings Papers
Wave-Induced Vibration Analysis of Fishing Vessel Based on Full-Scale Testing and Numerical Simulation
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-575
... measures are compared to decrease the vibration of the ship. Firstly, the vibrations at different positions of the ship structure are tested, and the vibration signals are analyzed in both time domain and frequency domain. Then, the three-dimensional finite element models of the vessel are developed...
Proceedings Papers
Numerical Simulation Study on Noise Reduction Measures for AHTS Vessel
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-577
... a sufficiently high modal density. If the number of modes in the middle and low frequency regions is small, the prediction error of the SEA method will be large. By combining Finite Element (FE) of low-frequency noise prediction and Statistical Energy Analysis (SEA) of high-frequency noise prediction, Shorter...
Proceedings Papers
Numerical Study of Free-Surface Behavior in Sloshing Flows within a Circular Tank
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-602
... of eco-friendly fuels has increasingly highlighted the importance of understanding sloshing phenomena, thereby emphasizing the growing need for related research. frequency dimensional effect free surface elevation int offshore polar eng conf tank wave height left and right sidewall circular...
Proceedings Papers
Deterministic Prediction of Parametric Roll Motion in Irregular Waves Using Artificial Intelligence
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-604
... machine learning prediction memory effect wave field parametric roll motion deterministic prediction motion record resonance neural network frequency sea state condition Proceedings of the Thirty-fifth (2025) International Ocean and Polar Engineering Conference Seoul/Goyang, Korea, June 1-6...
Proceedings Papers
Dynamic Mode Decomposition and Reconstruction of the Transient Pump-Jet Propulsor Flow in Nominal Wake Fields
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-634
... Eddy Simulation (IDDES), which captures the influence of nominal wake on flow separation and vortex evolution. Modal analysis further reveals that the instability within the velocity field is dominated by the modes with rotor blade passing frequency (BPF) and its harmonics. The extracted top three...
Proceedings Papers
Numerical Study of Unsteady Force Characteristics of an Azimuth Waterjet Propulsion at Different Ship Speeds
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-638
.... The strength of force fluctuation increases significantly with the ship speed. The spectra of each force components in various domain are given at various ship speed. The blade passing frequency and its multiples are observed to be the dominant frequency in most circumstances, and wide-band spectrum is also...
Proceedings Papers
Real-Time Structural Dynamic Performance Assessment of Offshore Wind Turbines Based on DS-RCAE and SSI
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-055
... time structural dynamic performance assessment machine learning modal parameter frequency wang assessment offshore wind turbine noise stream structure subsea system dynamic performance assessment liu architecture Proceedings of the Thirty-fifth (2025) International Ocean and Polar...
Proceedings Papers
Dynamic Analysis of a Floating Offshore Wind Turbine Using a Time-Domain Coupled Method with Load Reconstruction
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-056
... hydrodynamic analysis for FOWTs. Currently, numerical analysis for FOWTs mainly relies on frequency-domain methods, which fail to accurately capture the nonlinear and dynamic characteristics of structural responses. In this paper, a fully coupled time-domain analysis method is employed to study the structural...
Proceedings Papers
Phase III of OUCwind-HFDR Project: The Experimental Study on the Effects of Cable Structural Properties on the Cable-Stayed Tower Structure of a Semi-Submersible Floating Wind Turbine
Available to Purchase
Paper presented at the The 35th International Ocean and Polar Engineering Conference, June 1–6, 2025
Paper Number: ISOPE-I-25-057
... ABSTRACT It has been validated that wave-induced high-frequency structural (WIHF) responses pose huge risks to the tower for semi-submersible floating wind turbines (FWTs) through previous study(Bai et al., 2024b, 2024a, 2023). Hence, this paper aims to investigate the possible solutions...
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