Experimental and numerical study on holding power of rectangular-shaped anchors

Kimihiro To, Yusuke Fukumoto, Takao Yoshikawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper discusses the experimental and numerical investigations for the holding power of rectangular-shaped anchors. As the offshore developments are promoted, the mooring systems are often used as the station keeping systems of the marine floating structures. From a viewpoint of the energy consumption, the mechanical mooring systems with anchors are better than the dynamic mooring systems with thrusters. Up to now, however, the research and development regarding the mooring systems with the high holding anchors in the deep sea area, especially more than 500 m in depth, have hardly been carried out in Japan. In most cases, the conventional anchor shapes have experimentally and/or empirically been decided. In addition, only a few studies which relate the numerical analysis to the experimental test have been performed for the holding power. In order to obtain the optimal shape of anchors theoretically, therefore, the purpose of this study is to develop the estimation method for the holding power and to clarify the penetration mechanism of anchors in soil. In this paper, a series of experiments utilizing the small-sized anchor model is conducted. Here, the fluke shape of specimen is modeled by the rectangular flat plate for simplicity. From several experiments varying the geometric characteristics of the anchor model, the experimental results, e.g., the history of the holding power, the penetration depth, and the fluke surface angle at the maximum holding power, are obtained. Furthermore, the numerical simulation to evaluate the holding power is also carried out using the dynamic explicit non-linear finite element analysis (NLFEA) code, LS-DYNA, as well as the in-house distinct element method (DEM) code. From the comparison between the numerical results and the experimental results, the calculation accuracy is verified.

Original languageEnglish
Title of host publicationOffshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791851302
DOIs
Publication statusPublished - Jan 1 2018
EventASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018 - Madrid, Spain
Duration: Jun 17 2018Jun 22 2018

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume9

Other

OtherASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018
CountrySpain
CityMadrid
Period6/17/186/22/18

Fingerprint

Anchors
Mooring
Numerical analysis
Energy utilization
Experiments
Soils
Finite element method
Computer simulation

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

Cite this

To, K., Fukumoto, Y., & Yoshikawa, T. (2018). Experimental and numerical study on holding power of rectangular-shaped anchors. In Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 9). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/OMAE2018-77814

Experimental and numerical study on holding power of rectangular-shaped anchors. / To, Kimihiro; Fukumoto, Yusuke; Yoshikawa, Takao.

Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics. American Society of Mechanical Engineers (ASME), 2018. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE; Vol. 9).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

To, K, Fukumoto, Y & Yoshikawa, T 2018, Experimental and numerical study on holding power of rectangular-shaped anchors. in Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics. Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, vol. 9, American Society of Mechanical Engineers (ASME), ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018, Madrid, Spain, 6/17/18. https://doi.org/10.1115/OMAE2018-77814
To K, Fukumoto Y, Yoshikawa T. Experimental and numerical study on holding power of rectangular-shaped anchors. In Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics. American Society of Mechanical Engineers (ASME). 2018. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE). https://doi.org/10.1115/OMAE2018-77814
To, Kimihiro ; Fukumoto, Yusuke ; Yoshikawa, Takao. / Experimental and numerical study on holding power of rectangular-shaped anchors. Offshore Geotechnics; Honoring Symposium for Professor Bernard Molin on Marine and Offshore Hydrodynamics. American Society of Mechanical Engineers (ASME), 2018. (Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE).
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