颗粒碰撞阻尼动力吸振器的设计及实验研究
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摘要
将颗粒碰撞阻尼器和动力吸振器相结合,提出一种颗粒碰撞阻尼动力吸振器设计概念,该吸振器由一个装有碰撞颗粒材料的盒体和一个弹性元件组成,碰撞颗粒在盒体运动时发生碰撞而消耗能量。以一个五层的楼房框架模型为振动抑制对象,对其吸振性能进行了实验研究,并与相同质量的经典单质块动力吸振器的抑振效果进行比较。实验结果表明,所设计的颗粒碰撞阻尼动力吸振器扩展了经典的单质块动力吸振器的工作频率范围,对宽频带随机激励的振动响应具有良好的抑制效果,这种颗粒碰撞阻尼动力吸振器设计思想可以应用于高层建筑的地震和风振响应控制。
A new type of particle impact damped dynamic absorber,which consists of an elastic element and a box partially filled with impact particles,was designed and used in the vibration control of a five-storeys frame structure model.The dynamic properties of this type of damped dynamic absorber were experimentally compared with those of the classical dynamic absorber,which has the same mass and stiffness as the damped absorber.The frequency response functions(FRFs) of the frame structure with the two types of absorbers were measured respectively.It is shown that the particle impact damped absorber has a wider frequency band than the classical absorber.Vibration control test results of the frame structure subjected to random excitation demonstrates that the particle impact damped dynamic absorber exhibits a better random vibration absorption behavior than the classical dynamic absorber.It is expected that this new type of dynamic absorber can be applied in the control of seismic and wind excited vibration response of tall buildings.
A new type of particle impact damped dynamic absorber,which consists of an elastic element and a box partially filled with impact particles,was designed and used in the vibration control of a five-storeys frame structure model.The dynamic properties of this type of damped dynamic absorber were experimentally compared with those of the classical dynamic absorber,which has the same mass and stiffness as the damped absorber.The frequency response functions(FRFs) of the frame structure with the two types of absorbers were measured respectively.It is shown that the particle impact damped absorber has a wider frequency band than the classical absorber.Vibration control test results of the frame structure subjected to random excitation demonstrates that the particle impact damped dynamic absorber exhibits a better random vibration absorption behavior than the classical dynamic absorber.It is expected that this new type of dynamic absorber can be applied in the control of seismic and wind excited vibration response of tall buildings.
引文
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[5]Zuo L,Nayfeh S A.The two-degree-of-freedom tuned-massdamper for suppression of single-mode vibration under randomand harmonic excitation[J].ASME Journal of Vibration andAcoustics,2006,128(1):56-65.
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[7]胡溧,黄其柏,柳占新,等.颗粒阻尼的动态特性研究[J].振动与冲击,2009,28(1):134-137.
[8]周宏伟,陈前,林莎.垂直简谐激励下阻尼颗粒动态特性研究[J].振动与冲击,2007,26(9):124-127.
[9]周宏伟,陈前,段勇.颗粒阻尼的动力学特性研究[J].振动与冲击,2008,27(5):109-111.
[10]段勇,陈前,周宏伟.垂直简谐激励下颗粒阻尼耗能特性的仿真研究[J].振动与冲击,2009,28(2):28-31,35.
[2]Liu K F,Liu J.The damped dynamic vibration absorbers:re-visited and new result[J].Journal of Sound and Vibration,2005,284(3-5):1811-1189.
[3]Ozer M B,Royston TJ.Extending Den Hartog’s technique tomulti-degree-of-freedom systems[J].ASME Journal of Vibra-tion and Acoustics,2005,127(4):341-350.
[4]李春祥.土木工程结构的双层多重调谐质量阻尼器控制策略[J].地震工程与工程振动,2005,25(1):113-119.
[5]Zuo L,Nayfeh S A.The two-degree-of-freedom tuned-massdamper for suppression of single-mode vibration under randomand harmonic excitation[J].ASME Journal of Vibration andAcoustics,2006,128(1):56-65.
[6]刘耀宗,郁殿龙,赵宏刚,等.被动式动力吸振技术研究进展[J].机械工程学报,2007,43(3):14-21.
[7]胡溧,黄其柏,柳占新,等.颗粒阻尼的动态特性研究[J].振动与冲击,2009,28(1):134-137.
[8]周宏伟,陈前,林莎.垂直简谐激励下阻尼颗粒动态特性研究[J].振动与冲击,2007,26(9):124-127.
[9]周宏伟,陈前,段勇.颗粒阻尼的动力学特性研究[J].振动与冲击,2008,27(5):109-111.
[10]段勇,陈前,周宏伟.垂直简谐激励下颗粒阻尼耗能特性的仿真研究[J].振动与冲击,2009,28(2):28-31,35.
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