Inlämning av Examensarbete / Submission of Thesis

Ahmedelrayah Elrayah; Hazzaa Osman; Mohammad Fadaee BTH-AMT-EX--2009/D-03--SE, pp. 64. ING/School of Engineering, 2009.

The work

Författare / Author: Ahmedelrayah Elrayah, Hazzaa Osman, Mohammad Fadaee
Titel / Title: Modelling the Bouancy and Motion of a Submerged Body
Abstrakt Abstract:

Modeling the dynamic of a submerged body has received a wide attention in the recent years. The trend is toward modeling the buoyancy and motion of the sub-
merged body considering di®erent variables affects on it. The scope of this thesis is modeling the dynamic of a submerged body by estimating its natural characteristic, m,c and k since it is necessary to design offshore structures and highly important in the ocean wave arena.
An experimental study is carried out to model the dynamic of a submerged body in its heave mode. Since extracting all parameters from this experimental is not an easy task when measuring low frequencies, a numerical model is developed. The resonance frequency, added mass and the stiffness of buoy is successfully estimated. The nonlinearity of the system is detected here by comparing the estimated dynamic characteristic parameters of a different amplitudes.

Ämnesord / Subject: Maskinteknik - Mechanical Engineering\Structural Mechanics

Nyckelord / Keywords: Submerged body, Dynamic characteristic, Hydrostatic stiffness, Added mass and damping, Modal test, COMSOL Multiphysics, SDOF

Publication info

Dokument id / Document id:
Program:/ Programme Masters Programme in Mechanical Engineering 120 ECTS
Registreringsdatum / Date of registration: 08/18/2009
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Ansel Berghuvud, Andreas Josefsson
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: ING/School of Engineering

+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: bth_amt_ex_2009d03_se.pdf (1507 kB, öppnas i nytt fönster)