TY - GEN
T1 - Design Optimization of Braces for Three-Legged Minimum Jacket Offshore Structure
AU - Dhaneswara, I. Putu Dipa
AU - Prastianto, Rudi Walujo
AU - Rosyid, Daniel Muhammad
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2023
Y1 - 2023
N2 - The innovative design of offshore structures has developed rapidly in line with the increasing demand for energy from oil and gas in the world. One of the innovations is the effort to use a modified or minimum jacket structure. The minimum jacket structure is a concept that is very suitable to use in shallow water marginal fields, because the structural design is more economical in terms of cost, reusable, and easier to move than the conventional jacket. This study presents design optimization of the existing jacket platform in terms of brace pattern (configuration) and dimension selection with the objective function being to minimize the weight of the jacket platform. The optimization process was carried out with 2 steps of optimization scenarios which are selecting the most optimal jacket brace configuration among various variations and determining the most optimal jacket brace dimensions through a static in-place analysis of the jacket structure. The brace configuration variations considered are V-brace, N-brace, and K-brace patterns. The second optimization step is the determination of the brace dimensions including outside diameter (OD) and wall thickness (WT) by considering 12 model variations. The results showed that the optimization result on the existing minimum jacket has complied with the whole criteria and yielded a lighter structure weight of 3,542.11 kips. This optimized minimum jacket structure became 15.9% lighter than the weight of the existing initial jacket structure, which is 4,211.96 kips.
AB - The innovative design of offshore structures has developed rapidly in line with the increasing demand for energy from oil and gas in the world. One of the innovations is the effort to use a modified or minimum jacket structure. The minimum jacket structure is a concept that is very suitable to use in shallow water marginal fields, because the structural design is more economical in terms of cost, reusable, and easier to move than the conventional jacket. This study presents design optimization of the existing jacket platform in terms of brace pattern (configuration) and dimension selection with the objective function being to minimize the weight of the jacket platform. The optimization process was carried out with 2 steps of optimization scenarios which are selecting the most optimal jacket brace configuration among various variations and determining the most optimal jacket brace dimensions through a static in-place analysis of the jacket structure. The brace configuration variations considered are V-brace, N-brace, and K-brace patterns. The second optimization step is the determination of the brace dimensions including outside diameter (OD) and wall thickness (WT) by considering 12 model variations. The results showed that the optimization result on the existing minimum jacket has complied with the whole criteria and yielded a lighter structure weight of 3,542.11 kips. This optimized minimum jacket structure became 15.9% lighter than the weight of the existing initial jacket structure, which is 4,211.96 kips.
KW - Brace pattern
KW - Minimum jacket offshore structure
KW - Minimum weight
KW - Topology optimization
UR - http://www.scopus.com/inward/record.url?scp=85137083690&partnerID=8YFLogxK
U2 - 10.1007/978-981-19-0867-5_6
DO - 10.1007/978-981-19-0867-5_6
M3 - Conference contribution
AN - SCOPUS:85137083690
SN - 9789811908668
T3 - Lecture Notes in Mechanical Engineering
SP - 43
EP - 51
BT - Recent Advances in Mechanical Engineering - Select Proceedings of ICOME 2021
A2 - Tolj, Ivan
A2 - Reddy, M.V.
A2 - Syaifudin, Achmad
PB - Springer Science and Business Media Deutschland GmbH
T2 - 5th International Conference on Mechanical Engineering, ICOME 2021
Y2 - 25 August 2021 through 26 August 2021
ER -