| Author | Nakorn Suttara |
| Call Number | AIT Thesis no.OTM-09-05 |
| Subject(s) | Offshore structures--Dynamics
|
| Note | A 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 |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. OTM-09-05 |
| Abstract | In 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. |
| Year | 2009 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. OTM-09-05 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Offshore Technology and Management (OTM) |
| Chairperson(s) | Chiu, Gregory L.F.;Widjaja, Joko Harsono |
| Examination Committee(s) | Pennung Warnitchai;Boswell, Laurie |
| Scholarship Donor(s) | Royal Thai Government Fellowship;Asian Institute of Technology Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2009 |