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https://doi.org/10.21278/brod68203

PREDICTION OF THE VERTICAL MOTIONS OF DTMB 5415 SHIP USING DIFFERENT NUMERICAL APPROACHES

Ferdi Cakici ; Naval Architecture and Maritime Faculty, Yildiz Technical University, Istanbul, Turkey
Omer Faruk Sukas ; Naval Architecture and Maritime Faculty, Yildiz Technical University, Istanbul, Turkey
Omer Kemal Kinaci ; Naval Architecture and Maritime Faculty, Yildiz Technical University, Istanbul, Turkey
Ahmet Dursun Alkan ; Naval Architecture and Maritime Faculty, Yildiz Technical University, Istanbul, Turkey

Puni tekst: engleski, pdf (1 MB) str. 29-44 preuzimanja: 766* citiraj
APA 6th Edition
Cakici, F., Sukas, O.F., Kinaci, O.K. i Alkan, A.D. (2017). PREDICTION OF THE VERTICAL MOTIONS OF DTMB 5415 SHIP USING DIFFERENT NUMERICAL APPROACHES. Brodogradnja, 68 (2), 29-44. https://doi.org/10.21278/brod68203
MLA 8th Edition
Cakici, Ferdi, et al. "PREDICTION OF THE VERTICAL MOTIONS OF DTMB 5415 SHIP USING DIFFERENT NUMERICAL APPROACHES." Brodogradnja, vol. 68, br. 2, 2017, str. 29-44. https://doi.org/10.21278/brod68203. Citirano 21.10.2021.
Chicago 17th Edition
Cakici, Ferdi, Omer Faruk Sukas, Omer Kemal Kinaci i Ahmet Dursun Alkan. "PREDICTION OF THE VERTICAL MOTIONS OF DTMB 5415 SHIP USING DIFFERENT NUMERICAL APPROACHES." Brodogradnja 68, br. 2 (2017): 29-44. https://doi.org/10.21278/brod68203
Harvard
Cakici, F., et al. (2017). 'PREDICTION OF THE VERTICAL MOTIONS OF DTMB 5415 SHIP USING DIFFERENT NUMERICAL APPROACHES', Brodogradnja, 68(2), str. 29-44. https://doi.org/10.21278/brod68203
Vancouver
Cakici F, Sukas OF, Kinaci OK, Alkan AD. PREDICTION OF THE VERTICAL MOTIONS OF DTMB 5415 SHIP USING DIFFERENT NUMERICAL APPROACHES. Brodogradnja [Internet]. 2017 [pristupljeno 21.10.2021.];68(2):29-44. https://doi.org/10.21278/brod68203
IEEE
F. Cakici, O.F. Sukas, O.K. Kinaci i A.D. Alkan, "PREDICTION OF THE VERTICAL MOTIONS OF DTMB 5415 SHIP USING DIFFERENT NUMERICAL APPROACHES", Brodogradnja, vol.68, br. 2, str. 29-44, 2017. [Online]. https://doi.org/10.21278/brod68203

Sažetak
Recent developments in Computational Fluid Dynamics (CFD) enabled common access for researchers and thus offers solutions to various complex problems in many different fields. With this motivation, in this study, two kinds of numerical methods were employed to investigate the vertical motions in variable regular waves. While the potential method is commonly known as linear “strip theory”, the viscous approach is (the state of the art) named as URANS (Unsteady Reynolds Averaged Navier Stokes) solver which has a fully non-linear base. DTMB 5415 ship model form was selected for a series of computational works. Computational study was carried out to understand the seakeeping behaviour of the displacement hull for the stationary case Fn=0 and a high speed case Fn=0.41. The RAO (Response Amplitude Operator) graphs for the coupled heave - pitch motions and CoG (center of gravity) vertical acceleration of the hull were generated for five encounter frequencies. Results were validated with experiments and comparisons were made between the two numerical approaches with the help of RAO graphs. Obtained results showed that the limitations of the strip theory pose a handicap as the assumptions involved in the theory narrow down its application. The nonlinear viscous URANS approach is generally a better option returning closer results to experiments in a wide Froude number range but on the other hand it does not possess the practicality of the strip theory.

Ključne riječi
Seakeeping; CFD, Strip Theory; URANS, ship motions

Hrčak ID: 174120

URI
https://hrcak.srce.hr/174120

Posjeta: 1.355 *