Thesis supervisor: Balázs Géza Kövesdi
Location of studies (in Hungarian): BME Department of Structural Engineering Abbreviation of location of studies: BMEHS
Description of the research topic:
Development in the pipeline manufacturing and construction technics enables the installation of thin-walled pipelines with large diameter in deepwater as well. In the case of steel pipes the reduction of costs is directly related to the thickness optimization. Pipelines are designed to prevent local buckling failure and total collapse with minimum thickness. A locally damaged pipeline due to mechanical impacts, however, may collapse and if the hydrostatic pressure is high enough, the buckling may propagate along the whole pipeline, which reduces its usability and it can result in total failure. Therefore, the damaged part of the pipeline has to be localized. Stiffener rings are one of the best solutions for localizing the damaged part and to stop the buckling propagation in the shells subjected to external pressure. The aim of the research work is the analysis of the effect of buckling arrestors (stiffener rings) on the buckling strength of deepwater pipelines and the determination of economical solution for the combination of thickness reduction and stiffener application.
In the frame of the PhD research an extensive literature review should be completed in the topic of the deepwater pipelines and on the buckling behavior of cylindrical shells. Research program has to be developed for the investigation of the (i) critical buckling load and buckling propagation phenomena, (ii) application of buckle arrestors and (iii) effect of buckle arrestors on the buckling strength of the pipeline. An advanced numerical model should be developed to determine the structural behavior and resistance of various pipeline and arrestor geometries. Based on available test results and the numerical investigations the final aim is to investigate the effect of the height, thickness and shape of buckle arrestors on the ultimate strength of reinforced pipeline under external hydrostatic pressure and to develop economic solutions for the thickness reduction and application of buckling arrestors for deepwater pipelines.
Number of students who can be accepted: 1
Deadline for application: 2023-05-31
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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