变刚度磁动力吸振器分析与实验
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摘要
动力吸振器是利用附加的共振物体吸收需减振物体的振动能量从而实现减振的设备。传统吸振器的参数均为固定不变或仅限于产生离散变化,无法连续改变并控制其动力学性能。另外,传统动力吸振器多使用弹簧提供回复力,在交变应力的作用下,弹簧的疲劳损伤是限制吸振器寿命的主要因素。这两点限制了动力吸振技术的推广与应用。设计制造并测试了一种简易的变刚度磁动力吸振器,通过改变永磁体间的距离,调节吸振器的刚度。将所设计的动力吸振器用于直梁的减振,通过有限元分析和实验,验证了其吸振效果。
A dynamic vibration absorber absorbs the energy of a vibrating object at resonance frequency.The parameters of a traditional absorber are fixed,or are limited to discrete changes,thus are not available to be continuously altered or controlled.Meanwhile,a traditional dynamic absorber utilizes springs to generate resilience force.Under the action of alternating stress,the fatigue of the springs is the main culprit to limit the life span of the device.These defects limit the application of the traditional technology of vibration absorption.In this paper,a simple magnet-driven dynamic vibration absorber with variable stiffness is designed,manufactured and tested.The stiffness can be continuously adjusted by simply changing the distance between the permanent magnets.The paper applied the absorber to a case of vibrating cantilever beam,and used finite element analysis(FEA)and actual experiments to verify its effect of absorption.
A dynamic vibration absorber absorbs the energy of a vibrating object at resonance frequency.The parameters of a traditional absorber are fixed,or are limited to discrete changes,thus are not available to be continuously altered or controlled.Meanwhile,a traditional dynamic absorber utilizes springs to generate resilience force.Under the action of alternating stress,the fatigue of the springs is the main culprit to limit the life span of the device.These defects limit the application of the traditional technology of vibration absorption.In this paper,a simple magnet-driven dynamic vibration absorber with variable stiffness is designed,manufactured and tested.The stiffness can be continuously adjusted by simply changing the distance between the permanent magnets.The paper applied the absorber to a case of vibrating cantilever beam,and used finite element analysis(FEA)and actual experiments to verify its effect of absorption.
引文
[1]殷永康,陈光冶.半主动动力吸振器的变刚度技术[J].机械科学与技术,2014,33(7):1000-1007.
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[10]NGUYEN Q H,CHOI S B.Optimal design of a magneto-rheological brake absorber for torsional vibration control[J].Smart Materials and Structures,2012,21(2):9-17.
[11]KOMATSUZAKI T,LWATA Y.Design of a realtime adaptively tuned dynamic vibration absorber with a variable stiffness property using magnetorheological elastomer[J].Shock&Vibration,2015,2015(568):1-11.
[12]张步云,陈怀海,贺旭东,等.磁流变阻尼器减振特性实验研究[J].南京航空航天大学学报,2012,44(6):855-861.
[13]崔世明.阻尼可调式电磁吸振器的研究[D].哈尔滨:哈尔滨工程大学,2012.
[14]冯肖肖.电磁式半主动吸振器设计及实验研究[D].哈尔滨:哈尔滨工程大学,2013.
[15]陈怀海,贺旭东.振动及其控制[M].北京:国防工业出版社,2015.
[2]徐振邦.自调谐吸振技术研究[D].合肥:中国科学技术大学,2010.
[3]李汉堂.空气弹簧技术现状及发展趋势[J].橡塑技术与装备,2010(6):16-24.
[4]李美.带附加气室空气弹簧系统动态特性机理的研究[D].镇江:江苏大学,2012.
[5]蒋增荣.常见的弹簧早期疲劳断裂失效的现象及原因[C].第十五届全国弹簧学术会、第十三届全国弹簧失效分析讨论会暨第九届海峡两岸弹簧专业研讨会论文集,2014:110-115.
[6]陈灿辉,程海涛,刘建勋,等.轨道交通用空气弹簧的结构与应用研究[J].铁道机车车辆,2010,30(6):49-53.
[7]KIM Y K,KOO J H,KIM K S,et al.Suppressing harmonic vibrations of a miniature cryogenic cooler using an adaptive tunable vibration absorber based on magneto-rheological elastomers[J].Review of Scientific Instruments,2011,82(3):164-164.
[8]SHIN B C,YOON J H,KIM Y K,et al.Note:Vibration suppression using tunable vibration absorber based on stiffness variable magneto-rheological gel[J].Review of Scientific Instruments,2015,86(10):106106.
[9]HIRUNYAPRUK C,BRENNAN M J,MACE B R,et al.A tunable magneto-rheological fluid-filled beamlike vibration absorber[J].Smart Materials&Structures,2010,19(5):055020.
[10]NGUYEN Q H,CHOI S B.Optimal design of a magneto-rheological brake absorber for torsional vibration control[J].Smart Materials and Structures,2012,21(2):9-17.
[11]KOMATSUZAKI T,LWATA Y.Design of a realtime adaptively tuned dynamic vibration absorber with a variable stiffness property using magnetorheological elastomer[J].Shock&Vibration,2015,2015(568):1-11.
[12]张步云,陈怀海,贺旭东,等.磁流变阻尼器减振特性实验研究[J].南京航空航天大学学报,2012,44(6):855-861.
[13]崔世明.阻尼可调式电磁吸振器的研究[D].哈尔滨:哈尔滨工程大学,2012.
[14]冯肖肖.电磁式半主动吸振器设计及实验研究[D].哈尔滨:哈尔滨工程大学,2013.
[15]陈怀海,贺旭东.振动及其控制[M].北京:国防工业出版社,2015.