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An alternative method to the identification of the modal damping factor based on the dissipated energy

机译:一种基于耗散能量的模态阻尼因子识别方法

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摘要

The identification of the modal parameters from frequency response functions is a subject that is not new. However, the starting point often comes from the equations that govern the dynamic motion. In this paper, a novel approach is shown, resulting from an analysis that starts on the dissipated energy per cycle of vibration. Numerical and experimental examples were used in order to assess the effectiveness of the proposed method. It was shown that, for lightly damped systems with conveniently spaced modes, it produced quite accurate results when compared to those obtained from the method of the inverse. The technique also proved to be simple enough to be used for quick estimates of the modal damping factors. Finally, this paper is a contribution to modal analysis and identification methods, as the developed technique has never been proposed before.
机译:从频率响应函数中识别模态参数并不是一个新鲜话题。但是,起点通常来自控制动态运动的方程式。在本文中,显示了一种新颖的方法,该方法是从对每个振动周期的耗散能量开始的分析得出的。数值和实验实例被用来评估该方法的有效性。结果表明,对于模式间隔适当的轻阻尼系统,与通过逆方法获得的结果相比,它产生了相当准确的结果。事实证明,该技术非常简单,可用于快速估算模态阻尼因子。最后,本文对模态分析和识别方法做出了贡献,因为以前从未提出过这种先进的技术。

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