Dynamic Analysis and Extreme Response Evaluation of Lifting Operation of the Offshore Wind Turbine Jacket Foundation Using a Floating Crane Vessel

Round 1

Reviewer 1 Report

Dears Authors

 

Grateful for the opportunity to support the Journal of Marine Science and Engineering with the review of the paper entitled Dynamic analysis and extreme response evaluation of lifting operation of the offshore wind turbine jacket foundation using a floating crane vessel, I must indicate that it is well-structured research and that it presents a wide range of useful results for readers. However, I feel that the novelty of the work is not adequately highlighted. Classic methods of analysis have been used and my only condition to approve it in its current version would be that the authors highlight the novelty of the study presented.

 

Kind regards

Author Response

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Reviewer 2 Report

This paper investigates, using ANSYS, a multi-body coupling system with 15-DOF for the lowering operation of the jacket foundation of the offshore wind turbine. The novelty is good. After doing the bellow corrections it can be suggested for publication.

1- The used distributions should be more discussed. The limitation of the distributions should be completely mentioned.

2- How can the distributions be used in designing?

3- Validation section of the FE model should be remarkably enhanced.

4- In Section 2.3, the authors discuses about the used distribution in the paper. They used Rayleigh distribution [19], Gumbel distribution [21] and Weibull distribution [29], as in offshore wind energy. Bellow paper used this distribution for offshore structures. It should be cited and discussed.

Development of a probability distribution model for the SCFs in tubular X-connections retrofitted with FRP. In Structures, vol. 36, pp. 233-247. Elsevier, 2022.

5- Line 512, “Figure 17 (b) and (d)” should be “Figures 17 (b) and (d)”. Also, the same issues in the whole text.

6- Fig. 16 should be more discussed. The reasons of these behaviors should be cleared.  

Author Response

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Reviewer 3 Report

The present manuscript treats about a dynamic analysis and extreme response evaluation of lifting operation of the offshore wind turbine jacket foundation using a floating crane vessel. The manuscript is interesting and well written. I recommend to accept it subjected to the following modifications:

- Review the English language.

- Include more details about the numerical model such as numerical discretizations, time step, etc.

- Have you performed a mesh size sensibility analysis?

- Have you performed a time step sensitivity analysis?

- Please, include information about the computational time and details of the computer/s employed to carry out the simulations.

- Please, include information about the mesh such the number of elements and type.

- Have you validated the numerical model with experimental results?

- Line 286, change “ANASY” to “ANSYS”.

- Line 379, change “Li et al. selected 20, 25, 30, and 50 wave speeds for the simulation of the lowering process of the monopole foundation [5]” to “Li et al. [5] selected 20, 25, 30, and 50 wave speeds for the simulation of the lowering process of the monopole foundation”.

- Line 383, change “Li [5]” to “Li et al. [5]”.

Author Response

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Round 2

Reviewer 2 Report

The paper is ready for publication.