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035 _a.b12067209
099 9 _aAIT Thesis no.OTM-09-05
100 0 _aNakorn Suttara
245 1 0 _aDynamic wave response of non-linear offshore platform structural system
260 _aPathum Thani, Thailand :
_bAsian Institute of Technology,
_c2009
300 _a70 leaves :
_bill.
490 1 _aThesis ;
_vno. OTM-09-05
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Offshore Technology and Management, School of Engineering and Technology
502 _aThesis (M.Eng.) - Asian Institute of Technology, 2009
520 _aIn general, fixed offshore structure is always attacked by dynamic wave loads throughout its service life, but dynamic analysis is often avoided. Commonly, quasi»static is very popular for a long time in design process due to substantial convenience. In turn, if the nonlinearity of soil stiffness under seabed is taken into account, it is known that soil layers are not perfectly stiff unlike idealized fixed support. The characteristic of soil stiffness may affect the global structural stiffness. The monopod and four-leg jacket platforms would be investigated by using computer modeling program, SACS, and MATLAB for analysis. Therefore, structural frequency will become non-constant, and the frequency ratio of wave forces frequency to structural frequency may be close to unity leading to so-called resonance situation. In this study, the non-linear dynamic wave response analysis of fixed offshore structure. In conclusion, the behavior of such structure can be definitely concluded that non-linear soil stiffness significantly affects not only total structural response but also structural periods.
650 0 _aOffshore structures
_xDynamics
700 1 _aChiu, Gregory L.F.,
_eChairperson
700 1 _aWidjaja, Joko Harsono,
_eCo-Chairperson
700 0 _aPennung Warnitchai,
_eExamination Committee
700 1 _aBoswell, Laurie,
_eExamination committee
710 2 _aRoyal Thai Government Fellowship,
_eScholarship donor
710 2 _aAsian Institute of Technology Fellowship,
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. OTM-09-05
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B03590
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