0
research-article

Using DOE and design optimization to determine statically equivalent mooring system on truncated water depth

[+] Author and Article Information
Fábio M. G. Ferreira

Laboratório de Computação Científica e Visualização Centro de Tecnologia Universidade Federal de Alagoas Maceió/AL, Brazil
fabio.ferreira@lccv.ufal.br

Eduardo N. Lages

Laboratório de Computação Científica e Visualização Centro de Tecnologia Universidade Federal de Alagoas Maceió/AL, Brazil
enl@lccv.ufal.br

Silvana M. B. Afonso

Departamento de Engenharia Civil Universidade Federal de Pernambuco Recife/PE, Brazil
smb@ufpe.br

Paulo R. M. Lyra

Departamento de Engenharia Mecânica Universidade Federal de Pernambuco Recife/PE, Brazil
prmlyra@padmec.org

1Corresponding author.

ASME doi:10.1115/1.4036376 History: Received April 18, 2016; Revised March 16, 2017

Abstract

Several procedures have been proposed and developed to overcome the challenge in ultra-deepwaters testing. A realistic alternative approach uses a hybrid passive methodology through equivalent truncated mooring systems. Often, the searching for equivalent systems involves using a trial-and-error. As an alternative, researches on the use of optimization techniques to establish truncated mooring system with the required properties have been attempted in recent years. In the literature, it is available only approaches considering non-gradient based algorithms. These algorithms usually involve several parameters which require appropriate tuning to provide good performance. Our approach involves optimization algorithms based on gradient. We use a calibration method to perform a static adjustment of design variables to optimally fit truncated mooring system to full-depth mooring system, which proved efficient. A further feature of this work is related to the study of the influence of design variables on the response, through a methodology based on design of experiments (DOE), avoiding the use of irrelevant variables. It should be emphasized that to the authors knowledge this DOE methodology presented was not seen in other works in this field. We will show that the methodology proposed in this work makes easy to find an equivalent mooring system on truncated water depth. We will present and discuss two fictitious cases, one case based on the literature and another case based on a real scenario. The results show a good agreement between truncated mooring system and full-depth mooring system for the static adjustment.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In