VoL.24 高玉根等：基于网格法的遗传算法及其应用 363· 1321 ing MA,1989 7 DeJong K A.Analysis of the Behavior of a Class of Gen- 10周明，孙树栋.遗传算法原理及应用[M北京：国防 etic Adaptive Systems[D]:[Ph D thesis].Ann Arbor:Univ 工业出版社，1999 Michigan,1975 1张学良，黄玉美.遗传算法及其在机械工程中的应 8孙瑞祥，屈梁生.遗传算法优化效率的定量评价) 用).机械科学与技术，1997,16(1)：46,47 自动化学报，2000,26(4)：552 12 Pham D T,Karaboga D.Optimum Design of Fuzzy Logic 9 Goldberg D E.Genetic Algorithms in Search,Optimiza- Controllers Using Genetic Algorithms[J].J Sys Eng,1991 tion and Machine Learning[M].Addison Wesley:Read- (1):114 Genetic Algorithms Based on Grid and Its Application GAO Yugen2, WANG Guobiao DING Yuzhan 1)Civil and Environment Engineering School,UST Beijing,Beijing 100083,China 2)Shandong Institute of Technology,Zibo 255012,China ABSTRACT In Simple Genetic Algorithms(SGA),chromosomes are produced at random.In order to in- crease the popularity and diversity of individuals,a new genetic algorithms which produces chromosomes with grid is proposed,and its optimization efficiency is evaluated quantitatively.For comparision with SGA, the DeJong Function Flis used an example.Both results show that the new genetic algorithms with grid is valid for improving the optimal efficiency of genetic algorithms. KEY WORD genetic algorithms;grid;optimization algorithm 5堂望s6业es5s5理a6业ss堂ss2堂es堂SPosTenPenRonReoPesPes堂esee堂e理esa亚 Correlations Based on CFD and Their Applications in Optimization for Staggered and Parallel Plate Fin Heatsinks Jing Yang",Denpong Soodphakdee",Masud Behnia 1)Mechanical Engineering School,University of Science and Technology Beijing,Beijing 100083,China 2)School of Mechanical and Manufacturing Engineering.The University of New South Wales,Sydney 2052,Australia Abstract:Both parallel and staggered plate fin arrays have shown promise for use in high performance heat- sinks regard of its individual manufacturing costs.The geometrical and operational parameters are very im- portant to their cooling performance as heatsinks in practical applications.Fluent 5.0 commercial CFD(com- putational fluid dynamic)code is used to simulate the flow and heat transfer of those heatsinks of different realistic parameters.Based on those simulations,two correlations,concerning Nusselt number and friction factor as the functions of geometrical and operational parameters,FB(fin-base area ratio),PR'(ratio of span- wise pitch to lengthwise pitch)and Re,were developed.From the both,the performance comparisons for op- timizing geometrical and operational parameters of a fixed dimension heatsink are shown at constant pumping power and constant thermal resistance.Several optimized parameters were obtained with the discussion to various goals in real application.It demonstrates that in some particular situations,the parallel plate fin heat- sinks can out perform the staggered ones. Key words:fin heatsink;electronic cooling;CFD;optimization [Journal of University Science and Technology Beijing(English Edition)2002,9(1):25]叭〕 1 . 2 4 高玉根 等 : 基 于 网格 法 的遗 传算 法及其 应用 . 3幻 . 13 2 1 D e j o ng K A . A na ly s i s o f ht e B e h va i o r o f a C l a s s o f G e n - e ti e A dpa t i v e Sy set m s [D ] : [ P h D ht e s i s ] . A n n A br o r: U ni v M i c h ig na , 1 9 7 5 孙 瑞祥 ,屈 梁生 . 遗传算法优化 效率的定量评价 [J] . 自动化学报 , 2 0 0 0 , 26 ( 4 ) : 5 5 2 G o ldb e gr D E . G e n at i e A l g o ir t hln s i n S e acr h , OP t而iaz - ti o n a n d M ac h ine L e am ing IM ] . A ddi s o n W 七s l e y : R e ad - i n g M A , 19 8 9 10 周明 , 孙树 栋 . 遗传算法 原理及 应用 【M ] . 北 京 : 国防 工业 出版社 , 19 9 1 张学 良 , 黄玉 美 . 遗传算法及 其在机 械工 程 中的应 用 [J] . 机 械科学 与技术 , 19 9 7 , 1 6 ( l ) : 4 6 , 4 7 1 2 P h am D T, K ar ab o g a D . O tP而 um D e s ign o f Fu Z y L o g i e C o ntr o ller s U s i gn G e n e ti e A l g o ir th m s [ J ] . 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