Broadband vibration control of a structure by using a magnetorheological elastomer-based tuned dynamic absorber
Broadband vibration control of a structure by using a magnetorheological elastomer-based tuned dynamic absorber
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DOI：
10.1016/j.mechatronics.2016.09.006
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发表时间：
2016-12-01
期刊：
影响因子：
3.3
通讯作者：
Terashima, Osamu
中科院分区：
文献类型：
--
作者：
Komatsuzaki, Toshihiko;Inoue, Toshio;Terashima, Osamu
被动动力吸振器(DVA)是一种质量-弹簧系统，可以抑制结构在特定频率下的振动。当其激励频率接近其调谐频率时，DVA尤其有效。固定DVA的物理属性将其应用限制在窄带、谐波激励的振动问题上。频率可调的DVA可以调节其刚度，为振动控制设备提供了针对非平稳干扰的适应性。在本文中，我们提出了一种宽带频率可调的DVA，它的固有频率可以通过磁流变弹性体扩展到基值的300%以上。我们首先用有限元方法进行了磁场分析，观察到了磁芯内部强磁场的形成。通过充分利用DVA的频率可调性，我们评估了具有多个共振峰的声激板的实时振动控制性能。结果表明，用DVA代替被动吸振器可以有效地降低结构的振动，提高结构的性能。(C)2016爱思唯尔有限公司。保留所有权利。
A passive dynamic vibration absorber (DVA) is a mass-spring system that suppresses the vibration of a structure at a particular frequency. The DVA is especially effective when its excitation frequency is close to its tuned frequency. Fixing the physical properties of the DVA limits the application to a narrowband, harmonically excited vibration problem. A frequency-tunable DVA that can modulate its stiffness provides adaptability to the vibration control device against non-stationary disturbances. In this paper, we suggest a broadband frequency-tunable DVA whose natural frequency can be extended to more than 300% of the base value by using magnetorheological elastomers. We first conducted a magnetic field analysis by using a finite element method, through which the formation of a strong magnetic field within the core was observed. By taking full advantage of the frequency adjustability of the proposed DVA, we evaluated the real-time vibration control performance for an acoustically excited plate having multiple resonant peaks. The results show that the vibration of the structure can be effectively reduced with an improved performance by using a DVA instead of a passive absorber. (C) 2016 Elsevier Ltd. All rights reserved.