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Tuesday, May 5, 2020 | History

1 edition of Model tests and numerical simulation of ship capsizing in following seas found in the catalog.

Model tests and numerical simulation of ship capsizing in following seas

Model tests and numerical simulation of ship capsizing in following seas

final report for period December 1976 - October 1979

  • 39 Want to read
  • 18 Currently reading

Published by The Office, National Technical Information Service [distributor] in Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Ship models -- Testing.,
  • Stability of ships.

  • Edition Notes

    StatementWilliam J. Fallon ... [et al.] ; prepared for U.S. Department of Transportation, United States Coast Guard, Office of Research and Development.
    SeriesReport -- no. CG-D-08-81., Report (United States. Coast Guard. Office of Research and Development) -- no. CG-D-8-81.
    ContributionsFallon, W. J., United States. Coast Guard. Office of Research and Development., University of California, Berkeley. Dept. of Naval Architecture and Offshore Engineering.
    The Physical Object
    Pagination1 v. (various pagings) :
    ID Numbers
    Open LibraryOL15255877M

    This book contains a selection of research papers presented at the 11 th and 12 th International Ship Stability Workshops (Wageningen, and Washington DC, ) and the 11 th International Conference on Stability of Ships and Ocean Vehicles (Athens, ). The book is directed toward the ship stability community and presents innovative ideas concerning the understanding of the physical. The model tests were carried out at the SSPA Maritime Consulting facilities at G6teborg, Sweden in In parallel with the analysis of the experimental results, the de,'elopment of a computer time domain simulation pro­ gram for ship motions and capsizing in extreme waves was continued. The first version of the computer code and.

    capsizing probability calculations which are also described in Belenky, et al,. (). Split-Time Method for Random Stiffness The next step of the development of the split-time method was the consideration of the variation of roll restoring characteristics in stern quartering and following seas, which is realized as random stiffness. Conference. Model test method. [5]. Umeda N. and Papanikolaou d Guidelines for ITTC committee on the prediction of Extreme Ship Motions and Capsizing Benchmark Tests. 10 March , rev. 25 October [6]. Papanikolaou, A., Spanos, D., Benchmark Study on the Capsizing of a Damaged Ro-Ro Passenger Ship in Waves. Draft Final report.

    J. O. de Kat and J. R. Paulling, “The simulation of ship motions and capsizing in severe seas,” Transactions of the Society of Architects and Marine Engineering, Cited by:   The role and the methods of simulation of ship behaviour at sea including ship capsizing (V. Armenio et al.). Geometrical aspects of the broaching-to instability (K.J. Spyrou). Application of nonlinear dynamical system approach to ship capsize due to broaching in following and quartering seas (N. Umeda).


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Model tests and numerical simulation of ship capsizing in following seas Download PDF EPUB FB2

Model tests and numerical simulation of ship capsizing in following seas: final report for period December - October Author: William J Fallon ; United States. Model tests and numerical simulation of ship capsizing in following seas: final report for period December - October / By William J.

Fallon, Berkeley. Department of Naval Architecture and Offshore Engineering. ITTC () The Specialist Committee on Prediction of Extreme Ship Motions and Capsizing. Final report and recommendations to the 23rd ITTC. In: Proceedings of the 23rd ITTC, Vol 2, Venice, Italy, Italian Ship Model Basin (INSEAN), pp –Google Scholar.

ITTC () The Specialist Committee on Stability in by: 3. NTUA, Ship Design Laboratory) have shown some interesting aspects of the earlier accident phase before and during the flooding of the main garage deck.

The investigation has also shown options how the accident could have been avoided. The paper presents the treatment of complex full scale safety issues by numerical simulation methods. Numerical Evaluation of Capsizing Probability in Quartering Seas with Split Time Method estimate the probability of capsizing of naval ships in irregular quartering seas.

The calculation of the method can be applied to simulation and model test, but is limited by relatively mild nonlinearity; for ship.

Also, in the numerical model capsizing occured before the actual capsizing in model tests. With increased wave steepness and reduced wave length to ship length ratio, the model undergoes sinusoidal motions in the experiment while the numerical model approximate well this behaviour apart from some disturbances in roll motion (See Figure 5.).Cited by: 5.

• Both model tests and simulations confirmed that critical situations endangering the ship with respect to large roll amplitudes are observed in head as well as following seas.

• No capsizing events were found in beam seas at zero speed. • The most dangerous scenarios appeared to be those where the ship was traveling in following seas. The simulation results in Fig. 16 show that ship A experiences nearly no rolling motions when it sails in pure following seas with any wavelength.

When ship A with the same conditions sails in 15° oblique following seas, maximal rolling angles are clearly less than 5° for any wavelength other than time ship by: Numerical Simulation of Ship Manoeuvring Motion model tests in combined seaway/wind environment by use of a series of prototypes of different ship types (offshore supply vessel, bulk carrier.

method, assessing the intact stability of ships in heavy seas. The methodology is based on the assessment of ship motions in heavy seas cal-culated by means of numerical seakeeping simulations in the time domain.

All simulations are carried out in irregular, short crested waves, where the energy distribution is based on JON-SWAP Size: KB. A mathematical model of ship motions leading to capsize in astern waves (M.

Hamamoto, A. Munif). A note on the conceptual understanding of the stability theory of ships (A.Y. Odabasi). The role and the methods of simulation of ship behaviour at sea including ship capsizing (V. Armenio et al.). Ship Structure Committee, and United States Coast Guard (page images at HathiTrust) University of California, Berkeley.

Department of Naval Architecture and Offshore Engineering: Model tests and numerical simulation of ship capsizing in following seas: final report for period December - October / (Washington, D.C.

During the tests extreme roll motions of the two considered vessels could be observed in head seas and in following seas. Besides critical motion characteristics in following seas, like broaching, the model had to be determined by model tests in order to use these data for the validation of numerical ship motion simulations Keywords.

Nonlinear Ship Rolling and Capsizing. model tests have been conducted to allow the installation of bilge keels to control the rolling behavior. Numerical simulation of a ship capsizing in. Hamamoto M.,“Study on Ship Motions and Capsizing in Following Seas: 1 st Report - Equations of Motion for Numerical Simulation”, Journal of the SNA of Japan, Vol.

pp. – Google Scholar Hamamoto M.,“Study on Ship Motions and Capsizing in Following Seas: 2 nd Report - Simulation of Capsizing”, Author: Ioannis Tigkas, Kostas J. Spyrou. Model tests and numerical simulation of ship capsizing in following seas: final report for period December - October / (Washington, D.C.: The Office ; Springfield, Va.: National Technical Information Service [distributor], ), by William J.

Fallon, Berkeley. Department of Naval Architecture and Offshore Engineering University of California, and United States. time-domain numerical simulations or model-scale experiments in large, “random” waves derived from theoretical or experimental representations of severe ocean waves.

The direct results of such model test or numerical simulation campaigns are presented as a set of time histories of ship motion in large amplitude, irregular waves. The dedicated computer controlled experimental technique ensures the exact phase correlation of wave excitation and resultant ship motions.

Thus, the registered wave and the track of the ship model in the model test serve as input to the numerical simulation which results in the specific motion time by: 5. The data of the waves encountered, course and position, as well as the response of the model had to be determined by model tests in order to use these data for the validation of numerical ship motion simulations.

During the tests extreme roll motions of the two considered vessels could be observed in head seas and in following by: 2. COMPARISON OF NUMERICAL SIMULATION RESULTS WITH ITTC CAPSIZING MODEL TEST RESULTS Model ship for the ITTC capsizing model tests is a 1/15 scale fishing vessel, ‘Purse seiner’.

Table 1 shows principal dimensions of the model ship. Table 1 Principal dimension of fishing vessel ‘Purse seiner’ model Lpp m X CG m (aft) B m C. Specialist Committee on Stability in Waves Tasks: of the art review cal prediction of capsizing ures for prediction of capsizing of damaged ship ark test study for predicting parametric rolling cal techniques for assessing survival time of passenger ships ure for numerical estimation of roll damping.MODEL TESTS AND NUMERICAL S5IMULATION OF SHIP CAPSIZING IN FOLLOWING SEAS, O0- William J.

1Fallon Yuh-Lin 'Hwang Jose Lescaut Liguori 0 J. R. Paulling Gregg Visineau Paul D. Wood Department of Naval Architecture and Offsh- re n inn University of California, Berkeley, CA Sr4ESO' / FINAL REPO'RT. FOROz D Decambera- October [12]. During the period of to12 model ship collision tests were carried out in Germany (Woisin, ).

The model scales range from 1/12 to 1/ where the test setups resembled a striking In some recent investigations, powerful computers are used to model .