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Elimination of multimode resonances of composite plate by inertial nonlinear energy sinks

机译：惯性非线性能量沉消除复合板的多模共振

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摘要

Bending vibration of the elastic structure has many resonance modes. Especially, the composite plate structure has many low frequency modes. Therefore, devices capable of achieving wide-band vibration suppression are required. Multimode resonances elimination of composite plates by an inertial nonlinear energy sink (NES) is proposed for the first time. Different with the traditional NES, the mass of the absorber in the present work is replaced by an inerter to reduce the weight of the attached device. The response of the plate is investigated by the Galerkin discretization together with the harmonic balance method (HBM). The gravity effect of the mass of the traditional NES is presented. It shows the benefits of the inertial NES without affecting the resonant frequency of the primary system. By comparing the resonance with and without the NES, the proposed device is certified that it has good efficiency in vibration eliminating for both low-order and high-order resonance. It finds that the mass of the inertial NES, which can achieve the effective suppression effect, is relatively tiny. The parameter effect of the NES is discussed fully to achieve the optimum design. Optimal parameters on the resonance response of different modes are not identical. This paper will provide a good reference for vibration elimination of multimode resonance of plates.
机译：弹性结构的弯曲振动具有许多共振模式。特别地，复合板结构具有许多低频模式。因此，需要能够实现宽带振动抑制的装置。首次提出通过惯性非线性能量吸收器（NES）消除复合板的多模共振。与传统的NES不同，本工作中的吸收器质量被惰管代替，以减轻所连接装置的重量。通过Galerkin离散化和谐波平衡法（HBM）研究了板的响应。介绍了传统NES质量的重力效应。它显示了惯性NES的好处，而不会影响初级系统的谐振频率。通过比较带有和不带有NES的谐振，所提出的设备证明其对于低阶和高阶谐振均具有良好的振动消除效率。发现可以达到有效抑制效果的惯性NES质量相对较小。 NES的参数效果已得到充分讨论，以实现最佳设计。不同模式的共振响应的最佳参数并不相同。本文为消除板的多模共振提供了很好的参考。

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