Structural Optimization Based on Static Design Criteria of a Long Span Mobile Bridge using Genetic Algorithm
Long span mobile bridges (LSMBs) are widely used in military maneuver operations or civil rescue works across narrow gorges or rivers.Especially it is quite a difficult problem to design LSMBs of over 50 m length satisfying required safety criteria under military load class 70 (MLC 70),namely permit vehicle weight of 63.5 tons.In order to optimize a LSMB of 60 m length for both lightweight and minimum deflection under MLC 70,a multi-objective optimization process based on genetic algorithm (GA) and weighted sum method for handling multiple objectives was utilized after its validity verification with the six-member and five-node truss problem.GA in this study utilized a variable penalty function to treat design constraints and fitness function to deal with both objective and penalty functions together.Finite element structural analysis of the LSMB was done by ANSYS for the design optimization process.As the result,the optimally designed LSMB of 60 m span that meet requirements and safety criteria of a military bridging equipment design and test code has been successfully obtained.
Long span mobile bridge Sizing optimization Genetic algorithms Objective function Variable penalty function Fitness function
Sung Hyun Jang In Wook Hwang Bong Chul Kwon Soo Tae Kim Young Hyu Choi
Department of Mechanical Design and Manufacturing Engineering, Changwon National University,9 Sarim- Defense R&D Center, Doosan DST, 30 Sungju-dong, Uichang-gu, Changwon,Gyeongsangnam-do, 641-746, Kore Department of Mechanical Engineering, Changwon National University, 9 Sarim-dong, Uichang-gu,Changwo
国际会议
台湾
英文
4732-4741
2011-12-11（万方平台首次上网日期，不代表论文的发表时间）