Numerical study on the feasibility of offshore single blade installation by floating crane vessels

Zhao, Ying; Cheng, Zhengshun; Gao, Zhen; Sandvik, Peter Christian; Moan, Torgeir

doi:10.1016/j.marstruc.2018.12.001

Cited by 23 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, a global analysis of installation systems is beyond the scope of this paper, and the impact investigation using finite element analysis is considered for several impact velocities (V x ) ranging from 0.02 to 0.5 m/s. This range of velocities is reported as predominant while lifting blades using a floating crane vessel [6,19].…”

Section: * Corresponding Authormentioning

confidence: 79%

A comprehensive numerical investigation of the impact behaviour of an offshore wind turbine blade due to impact loads during installation

2019

Self Cite

View full text Add to dashboard Cite

For installing offshore wind turbines into deep waters, use of floating crane vessels is essential. One of the major challenges is their sensitivity to wave-induced vessel and crane tip motions, which can cause the impact of lifted components like blades and nacelle with nearby structures. The impact loads on fibre composite wind turbine blades are critical as several complex damage modes, capable of affecting the structural integrity, are developed. Planning of such installation tasks therefore requires response-based operational limits that consider impact loads on the blade along with their damage quantification. The research area considering the impact behaviour of the lifted blade is novel, and thus, the paper identifies vessel, blade and lifting parameters that determine impact/contact scenarios. Furthermore, for a case in which a lifted blade with its leading edge impacts the tower, a numerical modelling technique is presented in Abaqus/Explicit, and a comprehensive damage assessment of the blade and an investigation of the impact dynamics and energy evolution are performed. Sensitivity studies for two distinct blade designs and two different impact locations are considered. The results show that 7-20% of the impact energy is absorbed as damage in the blade, whereas the majority dissipates as rigid-body motions of the blade after the impact. The findings of the study highlight the requirement for advanced installation equipment, such as active tugger lines, to prevent successive impacts of wind turbine blades during installation.

show abstract

Section: * Corresponding Authormentioning

confidence: 79%

A comprehensive numerical investigation of the impact behaviour of an offshore wind turbine blade due to impact loads during installation

2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the present study, the North Sea center is the main focus, as highlighted in Figure 4. In this area, various marine operations have been studied and analyzed, such as the installation of offshore wind turbine monopiles and transition pieces [40], and single turbine blade [41][42][43][44]. Determining suitable weather windows based on the wave forecasts is a major challenge for decision-making during the execution of these operations.…”

Section: The Case Study Area and Datasetsmentioning

confidence: 99%

Multi-Step-Ahead Forecasting of Wave Conditions Based on a Physics-Based Machine Learning (PBML) Model for Marine Operations

Stefanakos

Gao

2020

JMSE

Self Cite

View full text Add to dashboard Cite

Short-term wave forecasts are essential for the execution of marine operations. In this paper, an efficient and reliable physics-based machine learning (PBML) model is proposed to realize the multi-step-ahead forecasting of wave conditions (e.g., significant wave height Hs and peak wave period Tp). In the model, the primary variables in physics-based wave models (i.e., the wind forcing and initial wave boundary condition) are considered as inputs. Meanwhile, a machine learning algorithm (artificial neural network, ANN) is adopted to build an implicit relation between inputs and forecasted outputs of wave conditions. The computational cost of this data-driven model is obviously much lower than that of the differential-equation based physical model. A ten-year (from 2001 to 2010) dataset of every three hours at the North Sea center was used to assess the model performance in a small domain. The result reveals high reliability for one-day-ahead Hs forecasts, while that of Tp is slightly lower due to the weaker implicit relationships between the data. Overall, the PBML model can be conceived as an efficient tool for the multi-step-ahead forecasting of wave conditions, and thus has great potential for furthering assist decision-making during the execution of marine operations.

show abstract

“…In recent years, affected by the shortage of land resources and attracted by marine resources, countries around the world have been increasing their investment in the development of marine resources, and ships are widely used as a reliable and efficient means of transportation. Among them, the marine crane, as a commonly used mechanical equipment on the ship deck, is also constantly enriched in its operation scenarios, which is widely used in salvaging of sunken ships [1], installation of wind turbines [2], deep water installation of subsea production facilities [3], ship replenishment [4], and so on. During these lifting operations, the crane payload swings due to cable flexibility, wind interference, ship movement, and operator commands.…”

Section: Introductionmentioning

confidence: 99%

Active damping methods to suppress the payload swing by a 3‐degree of freedom cable‐driven parallel robot

Wang

Jin

et al. 2023

Asian Journal of Control

View full text Add to dashboard Cite

Marine cranes play an important role in many hoisting scenes. However, due to the ship motion excitation and crane operation, the payload swing is unavoidable, hence putting the operators in danger. Thus, this paper proposes two active damping methods to suppress the payload swing by a 3‐DOF cable‐driven parallel robot (CDPR). First, the structure of the 3‐DOF CDPR is briefly introduced. Then, the dynamic model of the system is modeled as a constrained spherical pendulum with moving base excitations. Meanwhile, inspired by the air damping phenomenon, two active damping methods are presented to damp the payload swing naturally and smoothly. Furthermore, the payload swing under ship motion excitation and external hitting disturbances is analyzed, the influence mechanism of system damping parameters on the payload anti‐swing is discussed, and the robustness of the proposed damping methods is verified. By theoretical analysis and numerical simulations, some interesting discoveries are revealed: (1) the proposed damping methods can effectively suppress the big offset of payload swing angle inducing by external hitting disturbance, but the system might reach a dynamic equilibrium with a tilting hoist cable; (2) the phenomenon of “off‐center spherical pendulation” might be induced by improper setting of the damping parameters.

show abstract

Numerical study on the feasibility of offshore single blade installation by floating crane vessels

Cited by 23 publications

References 12 publications

A comprehensive numerical investigation of the impact behaviour of an offshore wind turbine blade due to impact loads during installation

A comprehensive numerical investigation of the impact behaviour of an offshore wind turbine blade due to impact loads during installation

Multi-Step-Ahead Forecasting of Wave Conditions Based on a Physics-Based Machine Learning (PBML) Model for Marine Operations

Active damping methods to suppress the payload swing by a 3‐degree of freedom cable‐driven parallel robot

Contact Info

Product

Resources

About