遺傳算法的改進(jìn)及其在車架優(yōu)化設(shè)計中的應(yīng)用.pdf

1、遺傳算法的改進(jìn)及其在車架優(yōu)化設(shè)計中的應(yīng)用TheImprovementofGeneticAlgorithmanditsApplicationonCarriageFrameOptimization作者姓名迕壹值學(xué)科類別堂壓亟學(xué)科、專業(yè)扭撼遮鹽丞理途研究方向瑰鹽遮讓理途丞披壟導(dǎo)師及職稱黃鏖副熬援2006年3月TheImprovementofGeneticAlgorithmanditsApplicationonCarriageFrameOpti

2、mizationAbstractGeneticalgorithmisarandomsearchandoptimizationmethodbasedonnaturalselectionandgeneticmechanismofthelivingbeings，whichisgoodatsearchingglobaloptimum，butitsconvergencespeedisslow；randomdirectionmethodhasfas

3、tconvergence，butispronetoconvergenceatlocaloptimumOntheotherhand，themechanicalstructureoptimizationsbelongtoconstrainedoptimizationproblemswithnonlinearequationsForthisreason，thispaperdividestheoptimalprocessintotwosteps

4、：first，searchingtheminimum(maximum)solutionswithgeneticalgorithmthatadoptsthetacticofkeepingthebestindividual：second，searchingtheoptimalsolutionswithrandomdirectionmethod，thebeginningpointistheoutcomesofthefirststepThetr

5、aditionalframeoptimizationdesignmethodhassomeshortcomingssuchastoomuchdesigncircle，repeatedworkandmoneywastingAfteranalyzingthestructuralcharactersofcarriageflame，thepaperintroducesanewdesignmethodtothestrengthandstiffne

6、ssdesignofcarriageframewhichsolvessomeproblemsduringoptimizationdesignAtthesametime，thestructuralparametersoptimizationdesignmethodoftheframe’sside—memberandcross—memberwasintroduced，andthentheobjectivefunctionandrestric

7、tionconditionsofcarriageflamewerebuiltupThemathematicalmodalWassolvedwithimprovedgeneticalgorithm，theresultindicatedthattheimprovedgeneticalgorithm—basedoptimaldesigncouldbeusedtotheoptimaldesignproblemsKEYWORDS：Genetica