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ID:52404243
大小:2.32 MB
页数:5页
时间:2020-03-27
《利用 ANSYS 模态分析的组合式圆振动筛降噪研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、设备设计/诊断维修/再制造现代制造工程(ModernManufacturingEngineering)2014年第3期利用ANSYS模态分析的组合式圆振动筛降噪研究袁世先,邵堃(河南职业技术学院机电工程系,郑州450046)摘要:针对组合式圆振动筛的降噪问题,提出了利用ANSYS软件的模态分析与噪声测量试验相结合的分析方法,找出模态频率与噪声源之间的联系,进而采取降低振动筛噪声的相应措施。通过模态分析预测筛体的模态频率分布和各阶振型形态,分析可知,振动筛的模态频率远离工作频率,不会因共振而产生强烈噪声。筛体4阶以上的振型都做高频振动,其频率远远高于工作频率,筛体零/部件的高频弹性
2、振动是产生噪声的根本原因。通过振动筛噪声测量试验,分析噪声的幅频特性和功率谱,噪声具有明显的中低频特性,这些噪声多数由筛体零/部件的高频弹性振动引起。分析振动筛的模态频率、振型和噪声频谱,找出噪声产生的根源,提出通过减小筛体零/部件的高频弹性振动的振幅来降低振动筛噪声的措施。关键词:振动筛;有限元分析;动力学特性;模态分析;降噪中图分类号:TD452文献标志码:A文章编号:1671—3133(2014)03—0123—05ResearchonnoisereductionofcombinedcircularvibrationscreenbasedonANSYSmodalanalys
3、isYuanShixian,ShaoKun(DepartmentofElectricalandMechanicalEngineering,HenanPolytechnic,Zhengzhou450046,China)Abstract:Forthenoisereductionissuesofthecombinedcircularvibratingscreen,thewaybyusingANSYSsoftwaresievemodalanalysisandconductingnoisemeasurementofcombiningtestsareproposed,identifythel
4、inkbetweenthemodalfrequenciesandthenoisesource,andtheneffectivemeasuresaretakentoreducevibrationnoise.Forecastingthemodalfrequencydistributionandvibrationmodeshapethroughmodalanalysis,modalfrequenciesoftheshakerareawayfromtheworkingfrequency,whichdoesnotproducestrongresonancenoise.Sieveorderm
5、orethanfourshapesaredoinghighfrequencyvibrationhigherthantheworkingfrequency.Thevibrationcomponent’selastichighfrequencyvibrationistherootcauseofnoise.Conductthenoisemeasurementtest,analyzetheamplitude-frequencycharacteristicsofthenoiseandthepowerspectrum,andconcludethatthenoisehasdistinctlow
6、frequencycharacteristics,mostofthesenoisecomponentsarecausedbythehigh-frequencyelasticvibration.Analyzingthevi-bratingsieve,modalfrequency,andvibration-andnoisespectrum,thesourceofnoisegenerationareidentified,effectivemeasuresaretakentoreducenoisemeasuresshakerbysuppressinghighfrequencycompon
7、entssieveelasticvibrationamplitude.Keywords:vibratingscreen;finiteelementanalysis;dynamiccharacteristics;modalanalysis;noisereduction高振动筛的工作效率和有效地降低振动筛噪声,是振0引言[2-3]动筛设计中急需解决的问题。本文以组合式圆振振动筛因具有结构简单、性能可靠和造价低廉等动筛为例,提出了利用ANSYS软件的模态分析与噪声优点,所以在煤炭、冶金
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