1载货汽车门密封系统的结构优化设计11摘要随着我国经济的快速发展，汽车产业作为国民经济的一个重要的支柱产业在近年内得到了快速的发展。随着技术水平和制造工艺的上升，消费者对汽车的舒适性能提出了更为严格的要求。而汽车的密封性能是评价汽车舒适性的一项重要指标，其中门密封系统是汽车车身密封中十分重要的一环，它密封性能的好坏将对乘客舱的舒适性产生很大的影响。在门密封系统中门密封条对密封性能影响最大。车门密封条在隔绝车内外空间，防止车外空间的尘土、雨水侵入车厢，同时也在汽车高速行驶时阻断车内外空气流动有很大作用，提高汽车的乘坐舒适性。门密封条大多由EPDM橡胶材料制成，同时为了保证密封的性能，密封条通常具有复杂的截面形状。由于密封条材料和结构的复杂性，使得新密封条的开发流程十分的繁琐，需要进行重复多次的实验才能定型生产。但是近年来计算机技术、非线性材料力学、有限元法和计算机图学得发展，使得在生产前就可以对其进行计算机仿真分析，对于发现其设计缺陷和优化其密封性能十分有利，提高了设计的品质与效率，同时也有利于降低开发成本.国外先进的密封条生产企业很早就开始了这方面的研究了，我国的密封条CAE技术起步较晚，只有少数的企业进行这方面的研究。为了提升我国密封条企业的竞争能力。本文主要涉及新密封条产品的开发，主要对象为载货汽车的门密封条，在设计中将使用ABAQUS软件对密封条结构进行分析，改善密封条的压缩负荷和压缩变形。关键词：门密封条，设计，仿真分析，有限元，结构优化21AbstractWiththedevelopmentofeconomyofourcountry,theautomobileindustryinChinaisrapidydevelopinginrecentyears.Withthedevelopmentofengineeringlevelandmanufacturingtechnology,thecustomershavestricterdemandincomfort.Andthesealingperformancesanimportantevaluatingindexofthecomfortofautomobile,especiallythedoor’ssealingisveryimportant.Thedoor’ssealingcandeterminethecomfortofcustomercompartment.Buttheautomotivedoorweatherstriparethemostimportant.Theautomotivedoorweatherstripinisolatedthecar’sinsideandoutside,preventingthedustandrainwaterfromgettingininsideofthecustomercompartment,besidesitalsocanpreventairflowingduringtheinahighspeed,allabovecanimprovethecomfortofthecustomercompartment.TheautomotivedoorweatherstripusuallyismadebyEPDM,andtokeepthesealingperformances,thestripusuallyhasacomplexcrosssection.Becauseofthematerialandcrosssectionofthestrip,makingtheexploitationprogressverycomplex,itneedstotestagainandagainuntilitsatisfytheperformances.Butcomputertechnique,unlinearmechanicsofmaterials,finiteelementtechniqueandtheCADtechniquefastdevelopment,itmakeswecansimulatethestripbeforethemanufacture,thesehavemanybenefitonexploitation,suchaswecanfindthedesignflawandoptimizethestructureofthestrip,improvetheproductqualityanddeaignefficiency,andreducedevelopmentcosts.Advancedstripmanufacturingenterprisesofthedevelopedcountryconductedthisfliedlongtimeago,theapplyingofCAEtechniqueinChinaisnotlong.Thereareseveralenterprisesusethistechnique.ToimprovethecompetitivenessofthestripmanufactureindustryinChina.Thispaperintroducetheexploitationofthetruckdoorweatherstrip,inprogressIusetheABAQUSprogramtoanalysethestrip’sstructure,optimizingthecompressionloadandthedeformationofcompression.Keywords:doorweatherstrip,design,simulate,finiteelement,Structureoptimize23目录摘要................................................................................................................................................................1Abstract............................................................................................................................................
