Topics in Nonlinear Dynamics, Volume 3 - Proceedings of the 30th IMAC, A Conference on Structural Dynamics, 2012
Topics in Nonlinear Dynamics, Volume 3 - Proceedings of the 30th IMAC, A Conference on Structural Dynamics, 2012
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非线性动力学主题，第 3 卷 - 第 30 届 IMAC 会议记录，结构动力学会议，2012 年
DOI：
10.1007/978-1-4614-2416-1_16
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Cammarano A
中科院分区：
文献类型：
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作者：
Cammarano A
非线性简正模为理论和实验动力学分析提供了一个严格的数学和物理框架。尽管还处于起步阶段，非线性模态的概念有可能为学术界和工业界提供一个分析非线性动力系统的有力工具。然而，为了充分利用这一理论的潜力（及其相关的仿真能力），有必要将其与非线性结构动力学的其他分支：即，为了计算真实物理结构的非线性模态，需要识别和量化其非线性。本文提出了一种基于实测频响函数的辨识方法，在计算系统非线性模态之前，先对系统的非线性进行辨识和量化。
Non linear normal modes offer a rigorous framework, both mathematical and physical, for theoretical and experimental dynamical analysis. Albeit still in its infancy, the concept of non linear normal modes has the potential of providing to both the academic and the industrial establishment a powerful tool for the analysis of non linear dynamical systems. However, in order to exploit the full potential of this theory (and its associated simulation capability), there is need to integrate it with other branches of non linear structural dynamics: namely, in order for the non linear normal modes of a real—physical—structure to be computed, there is need to identify and quantify its non linearity. In this paper, an identification method based on the measured Frequency Response Function (FRF) is employed to identify and quantify the system’s non linearity before computing the system’s non linear normal modes.