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Multimodal vibration damping of nonlinear structures using multiple nonlinear absorbers

机译:使用多个非线性吸收器的非线性结构的多峰振动阻尼

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摘要

This paper presents a tuning methodology for multiple nonlinear vibration absorbers that mitigate several nonlinear resonances simultaneously. Specifically, the objective is to maintain equal peaks in the frequency response for all controlled resonances in an as large as possible range of forcing amplitudes. Relying on an all-equal-peak design for linear regimes of motion and adopting a principle of similarity for nonlinear regimes, a semi-analytical expression of the absorber coefficients is derived using first-order harmonic balance and a series expansion of the harmonic coefficients. The proposed methodology is demonstrated numerically using two spring-mass systems.
机译:本文提出了一种用于同时减轻多个非线性共振的多个非线性减振器的调谐方法。具体而言,目标是在所有可能的共振中,在尽可能大的施力幅度范围内,使频率响应的峰值保持相等。依靠线性运动状态的全等峰设计,并针对非线性状态采用相似原理,利用一阶谐波平衡和谐波系数的级数展开,得出吸收系数的半解析表达式。使用两个弹簧质量系统以数值方式论证了所提出的方法。

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