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Allen and Jones revisited
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems.ORCID iD: 0000-0002-2093-3073
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems.ORCID iD: 0000-0002-8343-5098
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems.ORCID iD: 0000-0002-9110-9401
2014 (English)In: Ocean Engineering, ISSN 0029-8018, E-ISSN 1873-5258, Vol. 89, 119-133 p.Article in journal (Refereed) Published
Abstract [en]

In this paper the prevailing semi-empirical design method, used to predict design slamming pressures for high-speed craft and which is implemented in the scantling rules of the classification societies, is reconstructed and evaluated using numerical and experimental methodologies. It is shown that the present formulations are relevant in terms of the predicted pressures, but that there is room for improvements, particularly in relationship to modern high-speed craft structures. The design method is therefore modified in relationship to these observations using the numerical methodology, and it is concluded that these modifications result in significant improvements regarding the predicted design pressures. Finally a discussion on the analysis methodology; the formulation of lifetime design loads; and the structural loads developed due to the simplified design pressure model is presented.

Place, publisher, year, edition, pages
2014. Vol. 89, 119-133 p.
Keyword [en]
Local slamming, High-speed craft, Structural design, Experiments, Finite-element modeling
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:kth:diva-156124DOI: 10.1016/j.oceaneng.2014.07.005ISI: 000343690000011Scopus ID: 2-s2.0-84906718892OAI: oai:DiVA.org:kth-156124DiVA: diva2:772923
Note

QC 20141217

Available from: 2014-12-17 Created: 2014-11-21 Last updated: 2017-12-05Bibliographically approved
In thesis
1. New Perspectives on Analysis and Design of High-Speed Craft with Respect to Slamming
Open this publication in new window or tab >>New Perspectives on Analysis and Design of High-Speed Craft with Respect to Slamming
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

High-speed craft are in high demand in the maritime industry, for example, in maintenance operations for offshore structures, for search and rescue, for patrolling operations, or as leisure craft to deliver speed and excitement. Design and operation of high-speed craft are often governed by the hydrodynamic phenomena of slamming, which occur when the craft impact the wave surface. Slamming loads affect the high-speed craft system; the crew, the structure and various sub-systems and limit the operation. To meet the ever-increasing demands on safety, economy and reduced environmental impact, there is a need to develop more efficient high-speed craft. This progression is however limited by the prevailing semi-empirical design methods for high-speed planing craft structures. These methods provide only a basic description of the involved physics, and their validity has been questioned.

This thesis contributes to improving the conditions for designing efficient highspeed craft by focusing on two key topics: evaluation and development of the prevailing design methods for high-speed craft structures, and development towards structural design based on first principles modeling of the slamming process. In particular a methodological framework that enables detailed studies of the slamming phenomena using numerical simulations and experimental measurements is synthesized and evaluated. The methodological framework involves modeling of the wave environment, the craft hydromechanics and structural mechanics, and statistical characterization of the response processes. The framework forms the foundation for an extensive evaluation and development of the prevailing semi-empirical design methods for high-speed planing craft. Through the work presented in this thesis the framework is also shown to be a viable approach in the introduction of simulation-based design methods based on first principles modeling of the involved physics. Summarizing, the presented methods and results provide important steppingstones towards designing more efficient high-speed planing craft.

Place, publisher, year, edition, pages
Stockholm: Kungliga tekniska högskolan, 2016. 35 p.
Series
TRITA-AVE, ISSN 1651-7660 ; 2016:20
Keyword
Slamming, high-speed craft, finite-element analysis, design methods, experimental analysis, numerical simulations, design loads, statistical analysis
National Category
Vehicle Engineering
Research subject
Vehicle and Maritime Engineering
Identifiers
urn:nbn:se:kth:diva-190861 (URN)978-91-7595-976-4 (ISBN)
External cooperation:
Public defence
2016-09-29, F3, Lindstedtsvägen 26, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

QC 20160907

Available from: 2016-09-07 Created: 2016-08-17 Last updated: 2016-09-07Bibliographically approved

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Razola, MikaelRosén, AndersGarme, Karl

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