Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/121018
Title: AUTOMATIC SUBASSEMBLY SEQUENCING FOR OFFSHORE RIGS
Authors: ABBOTT ERNEST LESLIE SIDNEY
Keywords: Offshore Rigs, Construction Sequences, Polychromatic Sets, Lean in Rig Construction
Issue Date: 27-Feb-2015
Source: ABBOTT ERNEST LESLIE SIDNEY (2015-02-27). AUTOMATIC SUBASSEMBLY SEQUENCING FOR OFFSHORE RIGS. ScholarBank@NUS Repository.
Abstract: THIS WORK EMPLOYS LEAN PRINCIPLES; THIS CAN BE SEEN IN THE REDUCTION OF WORK CONTENT , THE REDUCTION IN THE DOUBLE HANDLING OF PARTS AND IN REDUCING OR ELIMINATING WAITING TIME FOR SUBASSEMBLIES AT THE ASSEMBLY POINT. THIS WORK EMPLOYS POLYCHROMATIC SET THEORY AS ITS KNOWLEDGE BASE. USING THIS, PART CONNECTIVITY AND PART RELATIONSHIPS ARE IDENTIFIED. SUCH IDENTIFICATION ALLOWS FOR AN INFERENCE ENGINE TO AUTOMATICALLY IDENTIFY THE OPTIMAL CONSTRUCTION SEQUENCES OF THE SUBASSEMBLIES. AN OPTIMIZING ENGINE USES THE KNOWLEDGE FROM THE INFERENCE ENGINE TO COMBINE SUBASSEMBLIES INTO SUB-BLOCKS, IF POSSIBLE, WITHIN THE CONSTRAINTS OF LENGTH, WIDTH, HEIGHT AND WEIGHT OF THE SUB-BLOCK. THE OPTIMIZING ENGINE ALSO OPTIMIZES THE WELDING WORK SEQUENCE USING A GENETIC ALGORITHM IN SUCH A MANNER THAT THE WORK (SUBASSEMBLY &/OR SUB-BLOCK) ARRIVES AT THE REQUIRED ASSEMBLY POINT JUST-IN-TIME OR AS NEAR TO JUST-IN-TIME AS POSSIBLE.
URI: http://scholarbank.nus.edu.sg/handle/10635/121018
Appears in Collections:Ph.D Theses (Open)

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