Purpose

The purpose of this paper is to present a three-dimensional vibration absorber platform (TDVAP) for vibration caused by variable multiple frequency excitation and impulse.

Methods

The TDVAP is made up of primary platform and absorbers. Considering the installation position of each vibration absorber, the analytical model of TDVAP is established. The absorbers are symmetrically distributed on the primary platform to reduce the coupling vibration of each degree of freedom. The frequency response of the primary platform is obtained to compare the results of symmetric and asymmetric distribution methods.

Results

The experiments demonstrate that the vibration of primary platform is suppressed by more than 8 dB in the frequency band from 13.5 Hz to 17 Hz using the energy harvester and vibration absorbers in x-axis. The suppressing speed of harmonic vibration and impulse response in y-axis can be accelerated by more than 65% using active vibration absorber. The coarse-fine adaptive tuned vibration absorber and multi-dynamic vibration absorber (MDVA) are used to achieve variable frequency vibration suppression in z-axis, and the vibration suppression rate 93.3% is achieved by the coarse-fine tuning method. The MDVA can help enhance the robustness of the primary platform and decrease the vibration peak. And the passive vibration absorbers are used to attenuate the three-dimensional vibration of the primary platform.

Conclusions

The three-dimensional vibration absorber platform can help suppress the complex vibration caused by variable multiple frequency excitation and impulse, and the vibration absorbers installed can not only help control the vibration in the corresponding direction, but also suppress the vibration in the other two directions due to the structural coupling.

中文翻译：

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用于可变多频激励和脉冲响应抑制的三维减振器平台

目的

本文的目的是提出一种用于可变多频激励和脉冲引起的振动的三维减振器平台（TDVAP）。

方法

TDVAP由主要平台和吸收器组成。考虑各减震器的安装位置，建立了TDVAP的解析模型。减震器对称分布在主平台上，以减小每个自由度的耦合振动。获得主平台的频率响应，以比较对称分配方法和非对称分配方法的结果。

结果

实验表明，使用x轴上的能量收集器和减振器，可以在13.5 Hz至17 Hz的频带内将主要平台的振动抑制8 dB以上。使用有源减振器可以将谐波振动和y轴上的脉冲响应的抑制速度提高65％以上。粗细自适应调谐减震器和多动态减震器（MDVA）用于实现z中的变频振动抑制轴，振动抑制率达到93.3％。MDVA可以帮助增强主要平台的坚固性并减少振动峰值。被动减振器用于衰减主平台的三维振动。

结论

三维减振器平台可以帮助抑制由可变多频激励和脉冲引起的复杂振动，并且所安装的减振器不仅可以帮助控制相应方向上的振动，而且还可以抑制其他两个方向上的振动。到结构耦合。