变摩擦阻尼方法的建模与实验分析
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摘要
考虑被动隔振系统自适应调整阻尼的技术措施,提出一种变摩擦阻尼方法;使隔振系统能近似地根据激振频率来改变自身阻尼,从而适应外界宽频激振。为了对此方法中的摩擦阻尼力建模,提出一种考虑了摩擦接触面间的相对速度与正压力影响的曲线摩擦模型。通过实验设计与研究,以参数辨识验证了此模型的拟合能力。
Stating with passive vibration isolator adjusting the damping adaptively,a method based on variable friction damping has been developed to satisfy the vibration isolation requirement in the broadband frequency range.By considering the effect of the relative velocity between the friction contact surfaces with normal pressure,a non-linear friction model which can describe the friction force in this method has been proposed.Through the experimental design and investigation,the fitting capability of this model has been examined by parameter identification.
Stating with passive vibration isolator adjusting the damping adaptively,a method based on variable friction damping has been developed to satisfy the vibration isolation requirement in the broadband frequency range.By considering the effect of the relative velocity between the friction contact surfaces with normal pressure,a non-linear friction model which can describe the friction force in this method has been proposed.Through the experimental design and investigation,the fitting capability of this model has been examined by parameter identification.
引文
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[2]Agrawal A K,Yang J N.A Semi-active electromagnetic friction damper for response control of structures; proceedings of the Structures Congress 2000.2000[C].
[3]欧进萍,杨肠.压电变摩擦阻尼器的性能试验与分析 [J].地震工程与工程振动.2003,23(4).
[4]瞿伟廉,陈朝晖,徐幼麟.压电材料智能摩擦阻尼器对高 耸钢塔结构风振反应的半主动控制[J].地震工程与工程 振动.2000,20(1).
[5]Chen G,Garrett G T,Chen C Q,Cheng F Y.Piezoelectric friction dampers for earthquake mitigation of buildings: design,fabrication,and characterization[J].Structural Engineering and Mechanics.2004,17(3-4).
[6]Unsal M,Niezrecki C,eta.A new semi-active piezoelectric based friction damper;proceedings of the Ninth International Conference on Sound and Vibration. Orlando,2002[C].
[7]赵东,马汝建,王威强,蔡冬梅,李桂喜,屈召富.新型 摩擦阻尼器:中华人民共和国,200410024285.9[P/OL]. 2004.
[8]赵东,马汝建,王威强,蔡冬梅,李桂喜,屈召富.可控 粘滞性阻尼器:中华人民共和国,200420051653.4[P/ OL].2004.
[9]王伟,王焕定,刘锐.无能源磁摩擦控制装置性能试 验研究[J].地震工程与工程振动.2002,22(4):163-168.
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