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Abstract There are many optimization problems in engineering fields, including shipbuilding. To solve such problems, a non-linear optimization program is developed in this study. The developed program consists of two modules; a non-linear optimization library “EzOptimizer” and a pre-compiler “EzPreCompiler” for the library. The “EzOptimizer”, which is written in C++ language, includes a number of optimization algorithms, such as the method of feasible directions (MFD), sequential quadratic programming (SQP), sequential linear programming (SLP), genetic algorithm (GA), multi-objective programming, linear programming, etc. In addition, the “EzOptimizer” includes a method, which is referred to a “hybrid optimization method”, for combining local and global optimization algorithms such that their drawbacks can be overcome, thus permitting the use of the salient features of the two algorithms. The “EzPreCompiler” is a type of interpreter for the “EzOptimizer”. The “EzPreCompiler” supports the keyword recognition method, and converts keywords of an input file into a C++ source file that are required for using the “EzOptimizer”. To evaluate the efficiency of the developed program, it was applied to various optimization problems in shipbuilding and the results show that it is applicable to a wide range of optimization problems.
Publication Date 2007-07-08

Kyu-Yeul Lee, Myung-Il Roh, Ju-Hwan Cha, "Development of a Non-linear Optimization Program and Its Applications to Shipbuilding", Proceedings of the 1st Mongolia-Korea Joint Workshop on CAD/CAM, Ulaanbaatar, Mongolia, pp. 1-5, 2007.07.08-10


  1. Yoon-Nam An, Joo-Sung Lee, Myung-Il Roh, Bum-Sang Yoon, Kyoung-Sik Chang, "Parametric Study of Mesh Refinement in Isogeometric Analysis", Proceedings of ISOPE(International Society of Offshore and Polar Engineers) 2010, Beijing, China, pp. 809-812, 2010.06.20-26

  2. Yoon-Nam An, Joo-Sung Lee, Myung-Il Roh, Bum-Sang Yoon, Kyoung-Sik Chang, "Parametric Study of Isogeometric Analysis Using NURBS", Proceedings of the 23rd Asian-Pacific TEAM(Technical Exchange and Advisory Meeting on Marine Structures) 2009, Kaohsiung, Taiwan, pp. 169-173, 2009.11.30-12.03

  3. Bo-Hyun Lee, Kyoung-Sik Chang, Bum-Sang Yoon, Joo-Sung Lee, Myung-Il Roh, "Large Eddy Simulation of Fully Turbulent Channel Flow Using Variational Multiscale Method", Proceedings of the 23rd Asian-Pacific TEAM(Technical Exchange and Advisory Meeting on Marine Structures) 2009, Kaohsiung, Taiwan, pp. 93-97, 2009.11.30-12.03

  4. John-Kyu Hwang, Geun-Jae Bang, Myung-Il Roh, Kyu-Yeul Lee, "Detailed Design and Construction of the Hull of an FPSO(Floating, Production, Storage, and Off-loading unit)", Proceedings of ISOPE 2009, Osaka, Japan, pp. 151-158, 2009.06.21-26

  5. Ji-Hyun Hwang, Young-Joo Ahn, Joon-Ho Min, Gwang-No Lee, Ho-Jin Jeong, Mung-Yu Kim, Hee-Chang Kim, Myung-Il Roh, Kyu-Yeul Lee, "Application of an Integrated Basic Process Engineering Solution to Generic LNG FPSO Topsides", Proceedings of ISOPE 2009

  6. Ji-Hyun Hwang, Ju-Hwan Cha, Seung-Ho Ham, Bo-Ram Kim, Myung-Il Roh, Kyu-Yeul Lee, "Establishment of Offshore Process FEED Method for Oil-Based FPSO Topsides Systems", Proceedings of ISOPE 2009, Osaka, Japan, pp. 144-150, 2009.06.21-26

  7. Ju-Hwan Cha, Seung-Ho Ham, Kyu-Yeul Lee, Myung-Il Roh, Kwang-Pil Park, Heung-Won Suh, "Discrete Event/Discrete Time Simulation of Block Erection by a Floating Crane based on Multibody System Dynamics", Proceedings of ISOPE 2009, Osaka, Japan

  8. Ji-Hyun Hwang, Joon-Ho Min, Young-Joo Ahn, Hee-Chang Kim, Myung-Il Roh, Kyu-Yeul Lee, "Optimized Methodology to Build an Integrated Solution to Offshore Topside Process Engineering", Proceedings of ISOPE 2008, Vancouver, Canada, 2008.07.06-11

  9. Ju-Hwan Cha, Myung-Il Roh, Seung-Ho Ham, Kyu-Yeul Lee, Kwang Phil Park, Heung Won Suh, "Development of an Integrated Simulation Framework and Its Application to Shipbuilding Process Planning", Proceedings of ICCAS(International Conference on Computer Applications in Shipbuilding) 2007, Portsmouth, UK, pp. 283-290, 2007-09.18-20

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    Kyu-Yeul Lee, Myung-Il Roh, Ju-Hwan Cha, "Development of a Non-linear Optimization Program and Its Applications to Shipbuilding", Proceedings of the 1st Mongolia-Korea Joint Workshop on CAD/CAM, Ulaanbaatar, Mongolia, pp. 1-5, 2007.07.08-10

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