CAJ | 학술논문

采用薄板单元和梁单元相结合的方法,建立了某半承载式客车骨架的有限元模型,并通过试验对模型进行了验证。首先,对原车模型进行了强度分析,获得整车应力分布信息,结果表明大部分构件有足够裕量储备,可以通过改变结构、构件截面参数等方法来进行优化减重。其次,通过构件对整车重量的灵敏度分析,获知对整车重量影响较大的构件,提出了轻量化优化方案,该方案减重达7.35%,效果明显。最后,通过对优化前后整车强度、刚度、模态特性等的比对,验证了优化方案的可行性。
채용박판단원화량단원상결합적방법,건립료모반승재식객차골가적유한원모형,병통과시험대모형진행료험증。수선,대원차모형진행료강도분석,획득정차응력분포신식,결과표명대부분구건유족구유량저비,가이통과개변결구、구건절면삼수등방법래진행우화감중。기차,통과구건대정차중량적령민도분석,획지대정차중량영향교대적구건,제출료경양화우화방안,해방안감중체7.35%,효과명현。최후,통과대우화전후정차강도、강도、모태특성등적비대,험증료우화방안적가행성。
A FE model of a semi-integral coach skeleton was established with shell elements and beam elements.The FE model was verified by experimental test.The strength of original coach skeleton model was computed and the stress distribution of the whole coach skeleton was obtained.Results show the potential for lightweight design through structure configuration modification and optimization.A sensitivity analysis was conducted to select the components which affect the structural performance mostly and a lightweight scheme was proposed,which shows the weight-saving is of 7.35% of the original model.The lightweight model is mainly developed on the basis of sensitivity analysis and topology optimization.Finally,the feasibility of the optimization scheme was verified by the comparison of strength,stiffness and modal parameters with the original model.