CAJ | 학술논문

从初始群体产生及交叉算子两个方面对带精英策略的快速非支配排序遗传算法（N S GA－Ⅱ）进行改进，对伸缩臂进行应力及挠度变形分析，得出应力及应变云图，以确保伸缩臂强度、刚度满足要求。以伸缩臂截面几何参数为设计变量，伸缩臂稳定性及自重为优化目标，利用iSIGHT软件将改进的NSGA－Ⅱ算法与An-sys有限元分析集成，以QY20汽车起重机伸缩臂为例，对起重机箱形伸缩臂进行多目标优化设计，得出Pareto前沿解，并与优化前的截面参数进行对比，验证了该算法的可行性。
종초시군체산생급교차산자량개방면대대정영책략적쾌속비지배배서유전산법（N S GA－Ⅱ）진행개진，대신축비진행응력급뇨도변형분석，득출응력급응변운도，이학보신축비강도、강도만족요구。이신축비절면궤하삼수위설계변량，신축비은정성급자중위우화목표，이용iSIGHT연건장개진적NSGA－Ⅱ산법여An-sys유한원분석집성，이QY20기차기중궤신축비위례，대기중궤상형신축비진행다목표우화설계，득출Pareto전연해，병여우화전적절면삼수진행대비，험증료해산법적가행성。
The rapid non-dominated sorting genetic algorithm (NSGA-Ⅱ)with elitist strategy is improved in the as-pects of generation of initial population and crossover operator.The stress and deflection deformation analysis is performed for the telescopic boom to get the stress and strain cloud picture,in order to guarantee the telescopic boom meets the strength and rigidity requirements.With the geometrical parameters of telescopic boom cross-section as the design variable, its stability and self-weight as optimal objective,the improved NSGA-Ⅱalgorithm is integrated with Ansys finite element a-nalysis by iSIGHT software.With the telescopic boom of QY20 truck crane as an example,the multi-target optimal design is performed for box-type telescopic boom of the crane,to get Pareto leading-edge solution which is compared with the cross-section parameter before optimization,proving feasibility of the algorithm.