Reliability of uncontrolled lateral buckling of subsea pipeline under high pressure and high temperature conditions | |
| Author | Napath Ruamchomrat |
| Call Number | AIT Thesis no.OTM-17-02 |
| Subject(s) | Pipelines--Testing Buckling (Mechanics) |
| 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-17-02 |
| Abstract | Pipelines are placed in the field for long run of the project t o facilitate the transportation of the hydrocarbon products. Safety issue in the structure is conc erned. Reliability of structure indicates the safety stage of st ructural integrity. This thesis demonstrates the failure probability assessment by using FEA in a proposed engineering p roblem. Five basic variables are considered as random variables, e.g., initial imperfection, yield strength, wall thickness, and axial and lateral soil friction. Load controlled condition (LCC) in pipeline local buckling is concerned as the failure. Limit s tate is expressed to an approximate limit state to reduce the computational effort by f inite element analyses. An approximation form is presented in the second-order polynomial function, which the failure probability is evaluated by numerical simulation, i.e., Monte C arlo simulation. The proposed adaptive scheme and elimination of random variables are adopted for reducing further computational effort whilst the results are anticipated to be a ccurate. In conclusions, the approximate limit state can be conducted in stead of the actual limit state. The proposed approximation method can result the failure probab ility, efficiently. Yield strength is the most sensitive variable in the analysis. The re sult is accurate and computational effort i s significantly reduced. Keywords: Structural Reliability, Respons e Surface, Failure Probability, Pipelines, Lateral Buckling, Uncontrolled Buckling, Finite Element Analysis, Monte Carlo Simulation. |
| Year | 2017 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. OTM-17-02 |
| 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. |
| Examination Committee(s) | Pornpong Asavadorndeja;Winai Ouypornprasert;Bui Van Dao |
| Scholarship Donor(s) | Thailand (HM King) |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2017 |