Change search
ReferencesLink to record
Permanent link

Direct link
Time-domain simulations and full-scale trials on planing craft in waves
KTH, Superseded Departments, Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-9110-9401
KTH, Superseded Departments, Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-8343-5098
2003 (English)In: International Shipbuilding Progress, ISSN 0020-868X, Vol. 50, no 3, 177-208 p.Article in journal (Refereed) Published
Abstract [en]

A time-domain simulation model for prediction of global response of planing craft in waves is presented. The simulation model is based on 2-dimensional potential theory, and by updating the hydrodynamic coefficients at each time step, taking the momentary section draught into account, the solution is non-linear. For evaluation captive model tests and full-scale trials that have been performed. Characteristic results from the full-scale trials are reviewed and discussed. The simulations are also validated with published model experiments. The agreement between simulations and experiments is generally good except for discrepancies in pitch moment and motion. The 2-dimensional approach is attractive from a computational cost point of view and it is believed that an adequate simulation model could be developed from the presented model by better modelling of the pressure at transom.

Place, publisher, year, edition, pages
2003. Vol. 50, no 3, 177-208 p.
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-4964OAI: diva2:7253
Available from: 2004-10-08 Created: 2004-10-08 Last updated: 2011-09-02Bibliographically approved
In thesis
1. Modeling of planing craft in waves
Open this publication in new window or tab >>Modeling of planing craft in waves
2004 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Simulation of the planing hull in waves has been addressed during the last 25 years and basically been approached by strip methods. This work follows that tradition and describes a time-domain strip model for simulation of the planing hull in waves. The actual fluid mechanical problem is simplified through the strip approach. The load distribution acting on the hull is approximated by determining the section load at a number of hull sections, strips. The section-wise 2-dimensional calculations are expressed in terms of added mass coefficients and used in the formulations of both inertia and excitation forces in the equations of motions. The modeling approach starts from the hypothetic assumption that the transient conditions can be modeled based on those section-wise calculations. The equation of motion is solved in the time-domain. The equation is up-dated at each time step and every iteration step with respect to the momentary distribution of section draught and relative incident velocity between the hull and water and catches the characteristic non-linear behavior of the planing craft in waves.

The model follows the principles of the pioneering work of E. E. Zarnick differing on model structure and in details such as the modeling of the lift in the transom area. A major part of the work is concerned with experiments and evaluation of simulations with respect to performed model tests and to published experiment data. Simulations of model tests have been performed and comparisons have been made between measured and simulated time series. The link between simulation and experiment is a wave model which is based on a wave height measurement signal. It is developed and evaluated in the thesis.

The conclusions are in favor of the 2-dimensional approach to modeling the conditions for the planing hull in waves and among further studies is evaluation of simulated loads and motions to full-scale trial measurement data.

Place, publisher, year, edition, pages
Stockholm: Farkost och flyg, 2004
Trita-AVE, ISSN 1651-7660 ; 2004:34
Hydraulic engineering, marine, ocean, Planing craft, time-domain simulation, design loads, Vattenteknik
National Category
Water Engineering
urn:nbn:se:kth:diva-14 (URN)91-7283-861-2 (ISBN)
Public defence
2004-10-14, Kollegiesalen, KTH, Valhallavägen 79, Stockholm, 10:00
Available from: 2004-10-08 Created: 2004-10-08 Last updated: 2012-03-20

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Garme, KarlRosén, Anders
By organisation
Aeronautical and Vehicle Engineering
In the same journal
International Shipbuilding Progress
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 574 hits
ReferencesLink to record
Permanent link

Direct link