Log in or Sign up
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser .
Resistance prediction methods/series for catamarans
Discussion in ' Multihulls ' started by Roni , Jul 8, 2020 .
Roni Junior Member
Hi there, I am looking for resistance prediction methods/series for catamarans around 10 m lenght, 6 ton displacement and 10 knots of speed (Froude number around 0.52). Any recommendations? Thanks
Ad Hoc Naval Architect
You can try HERE as this excellent research may give you a good first indication.
Alik Senior Member
We use following methods: - Molland series - see link from AdHoc, for round bilge shapes - Muller-Graf series - for semi-planing catamarans with chine - Savitsky planing method with hulls interaction factor - for planing catamarans - For narrow and light hulls, there is 'slender hull' method, this is originally a graph published by Doubrovsky in his book. However use with care, as comparing with tank tests seems the method underpredicts the resistance.
Alik said: ↑ ...- Muller-Graf series - for semi-planing catamarans with chine... Click to expand...
Richard Woods Woods Designs
10 knots on a 10m powercat is only just over the hump speed. So it would be best to either aim for displacement speeds of under 8 knots or go for mid teens as a minimum speed. see here for an example of one of my home built designs in that size range Richard Woods of Woods Designs www.sailingcatamarans.com
Thanks a lot everyone, will have a fun weekend studying. Richard Woods said: ↑ 10 knots on a 10m powercat is only just over the hump speed. So it would be best to either aim for displacement speeds of under 8 knots or go for mid teens as a minimum speed. Click to expand...
Dolfiman Senior Member
I did a similar investigation for a sailing catamaran, see the document attached to the quote#51 and the comments around. Calculating friction resistance, drag coefficient? https://www.boatdesign.net/threads/calculating-friction-resistance-drag-coefficient.62553/page-4
Bureau Naval Junior Member
Ad Hoc said: ↑ Which is also available HERE . But with these parameters, the M-G series is generally outside your scope. But may offer you some guidance in addition to the Molland paper. Click to expand...
guzzis3 Senior Member
Hi. I have found this calculator gives not unreasonable results for the power and cat specs I am interested in, but my interest is small motors on sailing cats. Free to use Propeller Sizing Calculators https://www.vicprop.com/free-propeller-sizing-calculators It predicts about 5 knots from 4hp on a 32' cat weighing 5300 lbs. Interestingly it predicts only 5,5 for a 6hp. When I input beam I double the hull beam to account for both. I would be very interested if anyone knows of a better calculator for speed predictions for displacement situations.
Bureau Naval said: ↑ Hi all. There is some time we arfe working with this series and we get som values of the Residuary resitance - weight ratio negatives for centains Volumetric Froudes. Does anybody knows if perhaps, there is some printing error in the coefficients values. Any help, most welcomed. Regards Click to expand...
Russell Brown Senior Member
Richard Woods said: ↑ 10 knots on a 10m powercat is only just over the hump speed. So it would be best to either aim for displacement speeds of under 8 knots or go for mid teens as a minimum speed. see here for an example of one of my home built designs in that size range Richard Woods of Woods Designs www.sailingcatamarans.com Click to expand...
guzzis3 said: ↑ I would be very interested if anyone knows of a better calculator for speed predictions for displacement situations. Click to expand...
Attached Files:
SA-VPP Power Catamaran 1.1_2021 07 07.ods
SA-VPP Power Catamaran 1.1_User Guide_2021 07 07.pdf
Ad Hoc said: ↑ I've used them in the past and not come across this... Can you post your numbers/data? Click to expand...
CAT-RESISTANCE-SERIES 89.xlsx
Dolfiman said: ↑ Can you test mine, SA-VPP Power Catamaran 1.1, based on Molland and al. results for Froude 0,4 to 1,0, and a connection with Holltrop for lower Froude < 0,4. It is a spreasheet application working with Open Office or Libre Office. Click to expand...
- Advertisement:
Ok, fine, just to mention a typo mistake in my User Guide, it is : Cms : midship section coefficient (section / Tc Bw) , and not of course .... (section / Lw Bw). (This coeff Cms is used in the Holtrop / coeff c5 formula)
Wave resistance prediction.
Resistance calculation of a "very" hard chine catamaran
catamaran added wave resistance
Frictional & Wave making Resistance
F28 cat pitchpole resistance
lateral resistance in amas and vakas
catamaran resistance
total resistance and power estimation for catamaran
Catamaran: Protruding shelves in the tunnel and resistance
Bwl and hull resistance.
- No, create an account now.
- Yes, my password is:
- Forgot your password?
MIT Libraries home DSpace@MIT
- DSpace@MIT Home
- MIT Libraries
- Undergraduate Theses
A preliminary design tool for resistance and powering prediction of catamaran vessels
Other Contributors
Terms of use, description, date issued, collections.
Message placeholder
- Jiang Xueyun, Feng Guoqing, Zhang Qingyue, Ren Huilong. (2016) The effect of plate spacing on the lateral wave load of SWATH ship[J]. Ship Science and Technology, 38(03): 13–17. [Google Scholar]
- Fang Jing, Huang Jing, Feng Baiwei, Chang Haichao, Li Zilu. (2018) The overall design of ultra-small catamaran unmanned ship based on CFD[J]. Ship Engineering, 40(05): 1–3+56. [Google Scholar]
- Sahoo P., Doctors L., Pretlove L. CFD prediction of the wave resistance of a catamaran with staggered demihulls. 2006. [Google Scholar]
- Zturk Deniz, Delen Cihad, Mancini Simone, Serifoglu Mehmet Ozan, Hizarci Turgay. (2021) Full-Scale CFD Analysis of Double-M Craft Seakeeping Performance in Regular Head Waves[J]. Journal of Marine Science and Engineering, 9(5). [Google Scholar]
- Du Youwei, Zhou Xinyuan. (2019) Resistance analysis and ship optimization of wave piercing catamaran[J]. Journal of Wuhan Institute of Shipbuilding Technology, 2019(1):87–90. [Google Scholar]
- Ma Jian, Zhang Zaifu, Li Huimin. (2011) Analysis of influencing factors of residual resistance of wave piercing catamaran and total resistance prediction method[J]. Ship Mechanics, 15(Z1): 32–39. [Google Scholar]
- Zha Ruosi. Numerical analysis of wave resistance increase of monohull and catamaran[D]. Shanghai Jiaotong University, 2015. [Google Scholar]
- Liu Jinling. Research on motion simulation and attitude control of wave piercing catamaran[D]. Harbin Engineering University, 2013. [Google Scholar]
- Molland A.F., Wellicome J.F., Couser P. Resistance Experiments on a Systematic Series of High-Speed Displacement Catamaran Forms: Variations of Length-Displacement Ratio and Breadth-Draugh Ratio. 1996. [Google Scholar]
- Insel M., Molland A.F. (1992) An investigation into the resistance components of high speed displacement catamarans[J]. Transactions of the royal institution of naval architects, 1992. [Google Scholar]
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.
Academia.edu no longer supports Internet Explorer.
To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser .
Enter the email address you signed up with and we'll email you a reset link.
- We're Hiring!
- Help Center
Practical evaluation of resistance of high-speed catamaran hull forms—Part I
2007, Ships and Offshore Structures
Related Papers
Lawrence Doctors
Journal of Ship Production and Design
Gregory Grigoropoulos
Ship Technology Research
EDITOR IASET
A displacement trimaran has several resistance components. The breakdown of these resistance components were experimentally studied by, the towing tank method. In addition, the phenomenon was also numerically studied by applying computational fluid dynamics (CFD). A typical trimaran model comprises of one main hull, which is 1.2-m long, and two symmetric side hulls, which are about 0.5-m long. The model was tested at various configurations, between Froude numbers 0.15 and 0.27, as well as at various lateral spacings (S/L) between 0.2 and 0.5. Experimentally, the model was examined with an ITS towing tank. For the CFD investigation, ANSYS-CFX was used, which is a commercial code. Each part of the trimaran hulls were tested, both experimentally and numerically. Such an individual examination, helped to elucidate on the interference phenomena between the hulls. A clear observation was noted using these methods. However, both methods helped to arrive at the same conclusion. The results demonstrated that, the wider the hull separation, the smaller the interference between the hulls. Furthermore, the wide separation (S/L=0.5) was an indication for 'no interference' between the hulls. This can be so assumed because, the overall result was comparably similar with the individual test of each hull, when interference was neglected, analyzing the obtained data comparatively with published data, which also suggests similar conclusions.
Jonathan Binns
Journal of Marine Science and Engineering
Apostolos Papanikolaou
The present study focuses on the hydrodynamic hull form optimization of a zero emission, battery driven, fast catamaran vessel. A two-stage optimization procedure was implemented to identify in the first stage (global optimization) the optimum combination of a ship’s main dimensions and later on in the second stage (local optimization) the optimal ship hull form, minimizing the required propulsion power for the set operational specifications and design constraints. Numerical results of speed-power performance for a prototype catamaran, intended for operation in the Stavanger area (Norway), were verified by model experiments at Hamburgische Schiffbau Versuchsanstalt (HSVA), proving the feasibility of this innovative, zero emissions, waterborne urban transportation concept.
Ahmed Osman Alaghbash
Engineering Journal Publication of Research work
— An investigation into the breakdown of resistance components of a displacement trimaran was carried out experimentally using a towing tank. A trimaran model consisting of one main-hull with length of 1.2m and two symmetric side-hulls with length of 0.5m was tested at various configurations between Froude numbers of 0.15 and 0.27 at various lateral spacing (S/L) between 0.2 and 0.5. The experimental investigation was conducted using a towing tank belongs to Institute of Technology Sepuluh Nopember (ITS) at Surabaya. Individual test on each part of trimaran hull was also carried out in order to clarify the interference phenomena between the hulls more clearly. Overall results indicated that the wider the hull separation, the smaller the interference between the hulls. The widest separation (S/L=0.5) indicated that there is nointerference between the hulls and this is in good agremeent with individual test of each hull when interference is neglected.
Procedia Manufacturing
Simone Mancini
RELATED PAPERS
Design of a Pleasure Craft with Catamaran Hull, Department of Naval Architecture and Ocean Engineering, Myanmar Maritime University, Final Year Project, November 2012, Thanlyin.
Htike Aung Kyaw
Library for Science AND Technology. (FREE ARCTICLE FOR SCIENCE)
Prasanta Sahoo
Bill Erick Castillo
Filipe Belga
Technium: Romanian Journal of Applied Sciences and Technology
dan obreja , Iatan Ciprian
Analele Universităţii "Dunărea de Jos" din Galaţi. Fascicula XI, Construcţii navale/ Annals of "Dunărea de Jos" of Galati, Fascicle XI, Shipbuilding
Journal of Engineering and Applied Sciences
Ridwan Saputra Nursal
International Journal of Naval Architecture and Ocean Engineering
mehmet Atlar
CFD Letters
Wiwin Sulistyawati , Yanuar Prof
Gary davidson
International Journal of Modern Research in Engineering and Technology
Ijmret Journal
Journal of Marine Science and Technology
Pablo Carrica
Gabriele Virzi' Mariotti , Giuseppe Lupo
J. Mikkelsen
Journal of Fluids and Structures
Jason Lavroff
Damien Holloway
Journal of Power and Energy Engineering
Samson Nitonye
Ships and Offshore Structures
Ocean Engineering
Andrea Di Mascio
Brodogradnja
Vikrant Kumar
FAST 2001: 4th – 6th September 2001, Southampton, UK
Tsai Jing-Fa
International Journal of Technology
I Ketut Aria Pria Utama
karim akbari
Stefano Brizzolara
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Ronald W Yeung
Journal of Marine Science …
Andrew Colling
Barbara Rinauro
Jurnal Teknologi
RELATED TOPICS
- We're Hiring!
- Help Center
- Find new research papers in:
- Health Sciences
- Earth Sciences
- Cognitive Science
- Mathematics
- Computer Science
- Academia ©2024
VIDEO
COMMENTS
INSEL & MOLLAND'S METHOD FOR CATAMARAN RESISTANCE PREDICTION (1992) The paper by Insel and Molland (1992) summarizes a calm water resistance investigation into high speed semi-displacement catamarans, with symmetrical hull forms based on experimental work carried out at the University of Southampton. Two interference effects contributing to ...
Alik Senior Member. We use following methods: - Molland series - see link from AdHoc, for round bilge shapes. - Muller-Graf series - for semi-planing catamarans with chine. - Savitsky planing method with hulls interaction factor - for planing catamarans. - For narrow and light hulls, there is 'slender hull' method, this is originally a graph ...
Extensive work has previously been devoted to the analysis of catamaran resistance. The resistance model presented herein builds on established theory, with new data and modeling contributions on the topics of wake hollow shape and form factors of slender catamarans. ... Resistance predictions are compared to towing tank data provided by the ...
This thesis aims towards the development of a tool that predicts the resistance and required power for catamaran vessels in the range of 20m to 80m. Vessels with both round bilge and hard chine ...
For the prediction of catamaran resistance, Ma Jian6 proposed a method for forecasting the total resistance of a wave piercing catamaran in 2011. The total drag coefficient of the wave piercing catamaran is: C CC CCt f r f AP (1) Among them, the friction coefficient Cf is based on the standard algorithm proposed by the 15th ITTC in
Wave resistance prediction of hard-chine catamarans through regression anal-ysis. Proceedings of the 2nd International Euro Conference on High Performance Marine Vehicles (HIPER'01). Hamburg ...
Resistance characteristics and power requirements are principal aspects of the catamaran design spiral as they are strongly coupled with speed and fuel economy, and, consequently, the operating and cost efficiencies of the vessel. This thesis aims towards the development of a tool that predicts the resistance and required power for catamaran ...
For the prediction of catamaran resistance, Ma Jian 6. proposed a method for fo recasting the total resistance of . a wave piercing catamaran in 2011. The total drag .
An empirical resistance model for fast catamarans named CatRES was constructed based on the database of model trials performed by MARINTEK up to about 1997. Several model trials have been carried out in the last twenty years, and SINTEF Ocean has experienced CatRes to give conservative resistance predictions.
form and preliminary prediction cf resistance of high-speed catamarans with slender demi-hulls. They have made use of Michell' s integral for slender vessels to estimate the wave resistance of demi-hulls, which combined with the average fórrn factor value of 1.42 and the ITTC 1957 friction line would provide the total resistance.
However, resistance prediction of catamarans requires more details to overcome all resistance characteristics to achieve the most suitable design. Resistance of full scale ship is highly relied on two main extrapolation methods following Froude (1872) and Hughes (1954) and this approach is adopted by International Towing Tank Conference (ITTC). ...
The article aims to design a calm water resistance predictor based on Machine Learning (ML) Tools and develop a systematic series for battery-driven catamaran hullforms. Additionally, employing a machine learning predictor for design optimization through the utilization of a Genetic Algorithm (GA) in an expedited manner. Regression Trees (RTs), Support Vector Machines (SVMs), and Artificial ...
to speed up the calculation of catamarans resistance prediction. Designers only need to calculate the wave resistance coefficient (Cw) of demihull catamaran. By using reference [3] formula, it will be known total resistance of demihullalong with its interference factors. Then, to calculate the catamarans resistance is by doubling the total
Ma Jian, Zhang Zaifu, Li Huimin. (2011) Analysis of influencing factors of residual resistance of wave piercing catamaran and total resistance prediction method[J]. Ship Mechanics, 15(Z1): 32-39. [Google Scholar] Zha Ruosi. Numerical analysis of wave resistance increase of monohull and catamaran[D]. Shanghai Jiaotong University, 2015. [Google ...
However, resistance prediction of catamarans requires more details to overcome all resistance characteristics to achieve the most suitable design. Resistance of full scale ship is highly relied on two main extrapolation methods following Froude (1872) and Hughes (1954) and this approach is adopted by International Towing Tank Conference (ITTC). ...
Although the catamaran configuration has been known for a long time, it is only in the recent past that such hull forms have enjoyed unprecedented usage in the high-speed ferry industry. One of the design challenges faced by naval architects is the accurate prediction of the hydrodynamic characteristics of such vessels, primarily in the areas of resistance, propulsion and seakeeping.
Resistance serves as a critical performance metric for ships. Swift and accurate resistance prediction can enhance ship design efficiency. Currently, methods for determining ship resistance encompass model tests, estimation techniques, and computational fluid dynamics (CFDs) simulations. There is a need to improve the prediction speed or accuracy of these methods. Machine learning is gradually ...
Catamarans with separation ratios of 0.2 to 0.5 are used in the comparisons of the method with experimental results. ... {Wave Resistance Prediction Of A CatamaranBy Linearised Theory}, author={Mustafa Insel and Anthony F. Molland and John F. Wellicome}, journal={WIT Transactions on the Built Environment}, year={1970}, volume={5}, url={https ...
— An investigation into the breakdown of resistance components of a displacement trimaran was carried out experimentally using a towing tank. A trimaran model consisting of one main-hull with length of 1.2m and two symmetric side-hulls with length of 0.5m was tested at various configurations between Froude numbers of 0.15 and 0.27 at various lateral spacing (S/L) between 0.2 and 0.5.
This has been proven in a numerical study that aimed to clarify the reduced total resistance in a traditional catamaran by modifying the hull form in line with the Lackenby method (Iqbal and ...
Semantic Scholar extracted view of "Resistance prediction for fast displacement catamarans" by S. Steen. ... In common catamaran vessels, demihulls are parallel to each other. In this paper, the total resistance of a catamaran vessel with non-parallel demihulls is investigated experimentally and … Expand. 3. PDF. 2 Excerpts; Save.
PDF | On Jan 1, 2009, K.J. Geurts published Resistance Prediction of Cruising Motor Catamarans | Find, read and cite all the research you need on ResearchGate
From this point of view, several types of research are made concerning calm water resistance prediction and prediction of seakeeping performance in regular and irregular wave conditions. Most of the studies are relied on the well-known benchmark Delft catamaran 372 ( van't Veer, 1998a ), ( van't Veer, 1998b ) while some of them used other ...
Data was lifted from each of the contour plots and regression analyses completed, resulting in polynomial expressions for the residuary resistance at each ofThe speed/length ratios, giving good results compared to the contouring plots and providing fast evaluation of the residency resistance component.