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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 42985 (08)
- University: Sharif University of Technology
- Department: Mechanical Engineering
- Advisor(s): Sayyaadi, Hassan
- Abstract:
- This paper was directed to recognize maneuver equations perfectly, and with regard to CFD method maneuver simulation is going to be done in form of two and three dimensional. Today, since CFD methods have been exerted in different works, further and more actual development of floating body's maneuver is going to be our special need. As numerical methods for floating body's maneuver simulation by RANS method are developing, more researches are being done about this field as well. This thesis is going to simulate primitively maneuver of one floating body by Smoothed Particle Hydrodynamic(SPH) method in order to be as the beginning of maneuver simulation by this method in which with regard to maneuver committee report in 2011, this method can be used expansively in near future in this field, and presented acceptable results. As it is written in this report no action has ever been taken in the field of maneuver using this method, and this issue makes present simulation task more difficult. Since restriction of execution time of written codes in SPH method was great, this primitive result had been achieved in which regarding to available computer resources, and also incomplete information about programming method by GPU, and parallel processing considering increase of program speed, in general, it is caused increasing the time of presenting results in form of three dimensional. Therefore, we have to present results, and do the tests in form of two dimensions. In spite of this, sloshing test was done in form of three dimensions, however the execution time of that was long. This test was done according to validation which shows acceptable consequences in related papers. Resistance computation test and floating body's velocity under fix force showed as velocity amount of Wigley's section increases, their resistance increases too in which it has presented acceptable results. Moreover, regarding to hydrodynamic coefficients computation test of this section, which periodic boundary of floating body have been used in them, showing power of SPH method. In these tests floating body had been pulled in basin by different velocity, and deviation angles in which after crossing-forces record, and related yawing moment, computing of hydrodynamic coefficients done. Correct behavior of forces, and acquired moments from results, will be understood if this tests compare with other related researches. Finally, according to accomplished tests, and slamming test of freely falling body, optimized form of that can be gained, which with comparing of body's type, and its dimensions, and impact forces amounts, optimized form of body will be acquired.
- Keywords:
- Ship Maneuvering ; Hydrodynamics ; Smoothed Particle Hydrodynamics (SPH) ; Sloshing ; Slamming ; Computational Fluid Dynamics (CFD)
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