2023.06AutomobileParts020研究与开发Research&Development收稿日期:2022-09-18作者简介:丁亚运(1990—),男,硕士研究生,研究方向为车辆工程。E-mail:yy531513918@163.com。DOI:10.19466/j.cnki.1674-1986.2023.06.004基于小重叠偏置碰撞的某B级车车身结构改进设计丁亚运1,魏新龙21.同济大学汽车学院,上海201804;2.上海翼锐汽车科技有限公司,上海201800摘要:某B级轿车在进行IIHS规程小重叠(25%)偏置碰撞测试中出现A柱折弯、假人受伤严重等现象,在等级评价中被评为“较差”,采用理论分析、有限元仿真和实车碰撞测试相结合的分析方法对其结构耐撞性进行改进研究。从理论角度分析小重叠偏置碰撞载荷传递路径和能量传递情况,并通过建立有限元模型模拟碰撞过程,将CAE仿真结果和实车测试结果进行对比,所反映的变形与侵入量较为一致。根据小偏置碰撞测试中车体结构变形及侵入量特点提出结构优化方案,对优化方案进行碰撞仿真。仿真结果表明:车辆的车体A柱折弯及变形程度和乘员舱侵入量明显改善,优化后的方案在等级评价中提升至“优秀”。最后将优化方案实施在实车上进行试验验证,同样获得“优秀”评级。关键词:小重叠偏置碰撞;结构耐撞性;有限元仿真;汽车安全性中图分类号:U461.91ImprovedDesignofBodyStructureofaClassBVehicleBasedonSmallOverlapOffsetCollisionDINGYayun1,WEIXinlong21.CollegeofAutomotiveStudies,TongjiUniversity,Shanghai201804,China;2.ShanghaiYiruiAutomobileTechnologyCo.,Ltd.,Shanghai201800,ChinaAbstract:AclassBcarwasevaluatedas“poor”duetothebendingofA-pillarandseriousinjuryofdummyinthesmalloverlap(25%)offsetcollisiontestofIIHSregulations.Thestructuralcrashworthinesswasimprovedbythecombinationoftheoreticalanalysis,finiteelementsimulationandrealvehiclecrashtest.Theloadtransferpathandenergytransferofsmalloverlapoffsetcollisionwereanalyzedtheoretically,andthefiniteelementmodelwasestablishedtosimulatethecollisionprocess.TheCAEsimulationresultswerecomparedwiththerealvehicletestresults,andthereflecteddeformationwasconsistentwiththeintrusion.Accordingtothecharacteristicsofbodystructuredeformationandintrusioninsmalloffsetcollisiontest,thestructuraloptimizationschemewasproposed,andthecollisionsimulationwascarriedoutfortheoptimizationscheme.Thesimulationresul...
