The effect of forward speed on nonlinear ship motion responses

Research output: Contribution to conferencePaper

Abstract

Time-domain nonlinear vertical motion response of the S-175 containership advancing in head sea condition in large amplitude waves are analysed and compared with the experimental results provided in the literature. The boundary value problem is solved by linear 3D Rankine source panel method with sources distributed on the ship surface, free surface and control surfaces. Nonlinear fluid forces, which arise from nonlinear restoring and Froude-Kylov forces, are calculated over the instantaneous wetted portion of the ship hull. Radiation forces are kept as linear and presented in terms of impulse response functions using convolution integrals. In large amplitude waves, nonlinear motion responses are identified and presented in terms of transfer functions. The numerical results are well agreed with the experimental results and show a significant increase in non-dimensional amplitudes with the increase in the ship speed. Validation of the in-house developed code is performed and showed good agreement with the experimental results in the large amplitude waves.
LanguageEnglish
Pages1-10
Number of pages10
Publication statusPublished - Jun 2015
Event18th International Conference on Ships and Shipping Research - Lecco, Italy
Duration: 23 Jun 201526 Jun 2015

Conference

Conference18th International Conference on Ships and Shipping Research
CountryItaly
CityLecco
Period23/06/1526/06/15

Fingerprint

Ships
Control surfaces
Impulse response
Convolution
Boundary value problems
Transfer functions
Radiation
Fluids

Keywords

  • time-domain
  • Rankine source method
  • nonlinear vertical motions
  • forward speed influence

Cite this

Hizir, O. G., Yuan, Z., Incecik, A., & Turan, O. (2015). The effect of forward speed on nonlinear ship motion responses. 1-10. Paper presented at 18th International Conference on Ships and Shipping Research, Lecco, Italy.
Hizir, Olgun Guven ; Yuan, Zhiming ; Incecik, Atilla ; Turan, Osman. / The effect of forward speed on nonlinear ship motion responses. Paper presented at 18th International Conference on Ships and Shipping Research, Lecco, Italy.10 p.
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Hizir, OG, Yuan, Z, Incecik, A & Turan, O 2015, 'The effect of forward speed on nonlinear ship motion responses' Paper presented at 18th International Conference on Ships and Shipping Research, Lecco, Italy, 23/06/15 - 26/06/15, pp. 1-10.

The effect of forward speed on nonlinear ship motion responses. / Hizir, Olgun Guven; Yuan, Zhiming; Incecik, Atilla; Turan, Osman.

2015. 1-10 Paper presented at 18th International Conference on Ships and Shipping Research, Lecco, Italy.

Research output: Contribution to conferencePaper

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T1 - The effect of forward speed on nonlinear ship motion responses

AU - Hizir, Olgun Guven

AU - Yuan, Zhiming

AU - Incecik, Atilla

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N2 - Time-domain nonlinear vertical motion response of the S-175 containership advancing in head sea condition in large amplitude waves are analysed and compared with the experimental results provided in the literature. The boundary value problem is solved by linear 3D Rankine source panel method with sources distributed on the ship surface, free surface and control surfaces. Nonlinear fluid forces, which arise from nonlinear restoring and Froude-Kylov forces, are calculated over the instantaneous wetted portion of the ship hull. Radiation forces are kept as linear and presented in terms of impulse response functions using convolution integrals. In large amplitude waves, nonlinear motion responses are identified and presented in terms of transfer functions. The numerical results are well agreed with the experimental results and show a significant increase in non-dimensional amplitudes with the increase in the ship speed. Validation of the in-house developed code is performed and showed good agreement with the experimental results in the large amplitude waves.

AB - Time-domain nonlinear vertical motion response of the S-175 containership advancing in head sea condition in large amplitude waves are analysed and compared with the experimental results provided in the literature. The boundary value problem is solved by linear 3D Rankine source panel method with sources distributed on the ship surface, free surface and control surfaces. Nonlinear fluid forces, which arise from nonlinear restoring and Froude-Kylov forces, are calculated over the instantaneous wetted portion of the ship hull. Radiation forces are kept as linear and presented in terms of impulse response functions using convolution integrals. In large amplitude waves, nonlinear motion responses are identified and presented in terms of transfer functions. The numerical results are well agreed with the experimental results and show a significant increase in non-dimensional amplitudes with the increase in the ship speed. Validation of the in-house developed code is performed and showed good agreement with the experimental results in the large amplitude waves.

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Hizir OG, Yuan Z, Incecik A, Turan O. The effect of forward speed on nonlinear ship motion responses. 2015. Paper presented at 18th International Conference on Ships and Shipping Research, Lecco, Italy.