Validation and verification of a planing craft motion prediction model based on experiments conducted on full-size crafts operating in real sea

Himabindu Allaka, Morel Groper

Research output: Contribution to journalArticlepeer-review

Abstract

Planing crafts encounter large accelerations and motions when operated at high speeds in a seaway. To enhance their design and operability, accurate prediction of the accelerations and motions which these crafts will exhibit in a seaway is necessary. Here, validation and testing of a computational model for motion assessment of a planing craft in a seaway (MAPCS) are presented. To the best of the author’s knowledge, the literature does not contain studies of validation and verification of motion prediction models with full-size crafts operated in a real sea. The presented experiments were conducted on two planing crafts significantly different in size—a small remotely controlled craft (retrofitted Jet-Ski) and a large 24.8-m craft—both operated in a real sea. The MAPCS model, based on two-dimensional strip theory, improves previously developed motion assessment models by embedding within it a near-transom pressure correction and improved added-mass theory and provides computed values for acceleration, angular velocity, and expected motions. The incoming sea waves were measured by a wave buoy, deployed separately and developed in-house, and validated using a standard ocean observatory wave buoy. The wave-induced pitch and vertical acceleration computed by the MAPCS model are compared with the experimental recorded data and the differences are addressed.

Original languageEnglish
Pages (from-to)1199-1216
Number of pages18
JournalJournal of Marine Science and Technology
Volume25
Issue number4
DOIs
StatePublished - 1 Dec 2020

Bibliographical note

Funding Information:
This study was supported by the Leona M. and Harry B. Helmsley Charitable Trust, the Maurice Hatter Foundation, and the Paul Amir Foundation. Research at the University of Haifa was conducted at the Hatter Department of Marine Technologies in the Sub Sea Engineering Lab. The authors are grateful to the Israel Shipyards Ltd. for providing an opportunity to conduct experiments on a Shaldag MK II class fast patrol boat. The authors also thank the Coastal and Marine Engineering Research Institute for providing real sea wave elevation data.

Funding Information:
This study was supported by the Leona M. and Harry B. Helmsley Charitable Trust, the Maurice Hatter Foundation, and the Paul Amir Foundation. Research at the University of Haifa was conducted at the Hatter Department of Marine Technologies in the Sub Sea Engineering Lab. The authors are grateful to the Israel Shipyards Ltd. for providing an opportunity to conduct experiments on a Shaldag MK II class fast patrol boat. The authors also thank the Coastal and Marine Engineering Research Institute for providing real sea wave elevation data .

Publisher Copyright:
© 2020, The Japan Society of Naval Architects and Ocean Engineers (JASNAOE).

Keywords

  • Hydrodynamics
  • Motion assessment
  • Planing craft
  • Strip theory

ASJC Scopus subject areas

  • Oceanography
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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