欢迎来到天天文库
浏览记录
ID:12400436
大小:49.43 KB
页数:50页
时间:2018-07-16
《f载重车模态分析毕业论文》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、F21载重车模态分析毕业论文摘要随着国民经济持续多年的高速发展,尤其是国家对基础设施建设投入的逐年加大,使得载重汽车的生产在今年来呈现了爆发式发展,而改善载重车平顺性的研究也越来越受到重视。平顺性是影响乘员舒适性和运输货物完好最重要的因素,波及到载重车的动力性和经济性。本文针对一款国产F21型平衡悬架三轴载重车,主要通过ANSYS软件对载重车进行模态分析计算来研究其平顺性。对该车进行了简化,根据振动力学多自由度系统的理论分析,通过软件建立F21型载重车的多自由度系统的振动模型,在频率域内对模型了进行了模态分析的求解,
2、得到5阶固有频率和5阶振型图,对各阶振型图进了对比分析,为以后改善平顺性的研究打下了基础。关键词:平顺性;模态分析;多自由度;固有频率;振型;Title:Abstract:Withforseveralyearstherapiddevelopmentofnationaleconomy,especiallythestateofinfrastructurespendingincreasedyearbyyear,makethetruckproductionintheyeartorendertheexplosivedevelo
3、pment,andimprovethetruckcomfortresearchisbecomingmoreandmoreattention.Comfortisaffectedoccupantcomfortandtransportthegoodsingoodcondition,themostimportantfactorsaffectedtothetruckperformanceandfueleconomy.InthispaperamodelofF21balancesuspensionthree-axistruck,m
4、ainlythroughtheANSYSsoftwarewascarriedoutonthetruckmodalanalysisandcalculationtostudyitscomfort.Tosimplifythevehicle,accordingtothetheoryofvibrationmechanicsofmultidegreeoffreedomsystemanalysis,throughthesoftwarebuildF21typetruckvibrationmodeloffivedegreesoffre
5、edomsystem,thefrequencydomainmodelforthesolutionofthemodalanalysis,get5ordernaturalfrequencyandmodeshapesmodelfigure,foreachorderintothemodalanalysis,laidthefoundationforlaterworktoimprovetheridecomfort.Keywords:Comfort;Themodalanalysis;Manydegreesoffreedom;Nat
6、uralfrequency;Vibrationmode;目录1绪论.............................................................11.1课题研究背景...................................................11.2国内外研究现状.................................................21.2.1研究方法的分类.................................
7、............21.2.2汽车动力模型研究...........................................41.2.3平顺性评价方法和指标的优化.................................51.3本课题研究的目的和意义.........................................51.4本文的研究内容.................................................62模态分析理论及ANSYS软件介绍......
8、...............................72.1振动力学分析...................................................72.1.1多自由度系统无阻尼振动.....................................72.1.2多自由度系统有阻尼振动..........
此文档下载收益归作者所有