一种基于磁流变阻尼器的减振降噪装置设计
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摘要
根据减振装置的结构与隔振原理,建立了单自由度的隔振模型,利用隔振传递率分析降噪效果,研究了磁流变阻尼器对降噪的影响.根据单自由度隔振模型,可设计用于实验室的减振降噪台.测试实验台的力传递函数幅频特性可知:对于给定频率的激励,实验台能降低30～40 dB的噪声.
Based on vibration-reduction structures and vibration-insulation principles,a vibration-insulation model is first proposed regarding single degree-of-freedom.In this manner,the noise reduction is analyzed via vibration-insulation transfer rate.Furthermore,the impacts of magneto-rheological dampers are investigated on vibration reduction.Then,an experimental vibration-reduction test-bed is designed.Finally,it is detected from the amplitude-frequency properties that the noise can be reduced by 30~40 dB in terms of a specific frequency excitation.
Based on vibration-reduction structures and vibration-insulation principles,a vibration-insulation model is first proposed regarding single degree-of-freedom.In this manner,the noise reduction is analyzed via vibration-insulation transfer rate.Furthermore,the impacts of magneto-rheological dampers are investigated on vibration reduction.Then,an experimental vibration-reduction test-bed is designed.Finally,it is detected from the amplitude-frequency properties that the noise can be reduced by 30~40 dB in terms of a specific frequency excitation.
引文
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[4]张纪平,熊诗波,梁义维,等.简谐力作用下含干摩擦单自由度系统振动控制[J].太原理工大学学报,2008,39(5):447-449.ZHANGJiping,XIONG Shibo,LI ANG Yi wei,et al.Vibration control of the single-model systemincluding the coulomb and viscousdamping under the harmonic excitation[J].Journal of Taiyuan University of Technology,2008,39(5):447-449.
[5]李国平,魏燕定,陈子辰.精密设备系统主动隔振的基础理论与技术[J].兵工学报,2004,25(4):462-466.LI Guoping,WEI Yanding,CHENZichen.Basic theory and technologyin the active vibrativeioslation of precision devides[J].Acta Ar-mamentarii,2004,25(4):462-466.
[6]彭金松,萧蕴诗,苏永清,等.磁流变液特性和潜在应用[J].液压与气动,2003(8):27-29.PENGJinsong,XI AO Yunshi,SU Yongqing,et al.Characteristic and potential application of magneto-rheological fluid[J].Chinese Hy-draulics and Pneumatics,2003(8):27-29.
[7]裴畅贵,郭张霞.磁流变液特性分析[J].机械管理开发,2007(2):24-25.PEI Changgui,GUO Zhangxia.Behavior analysis of magneto-rheological fluids[J].Mechanical Management and Development,2007(2):24-25.
[8]GI NDERJ M.Behavior of magnetorheological fluids[J].MRS Bulletin,1998,23(8):26-29.
[9]刘惠岭.环境噪声控制[M].哈尔滨:哈尔滨工业大学出版社,2002.LI U Huiling.Environmental noise control[M].Harbin:Harbin Institute of Technology Press,2002.
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