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arXiv 2108.08152math.DSmath-phmath.MP
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用谱子流形分析具有内共振的受迫机械系统的非线性,第II部分:分叉和准周期响应

Nonlinear analysis of forced mechanical systems with internal resonance using spectral submanifolds, Part II: Bifurcation and quasi-periodic response

Mingwu Li, George Haller

摘要:

在本文的第一部分中,我们利用谱子流形(SSM)理论来构造具有内共振的简谐激励机械系统的降阶模型。在这种情况下,提取强迫响应曲线形成的周期轨道的整个系统减少到定位相应的降阶模型的平衡的解决方案分支。在这里,我们使用的降阶模型的平衡点的分岔预测分岔的周期响应的完整系统。具体而言,我们确定的平衡点和极限环的降阶模型的SSM的Hopf分支预测的存在的二维和三维的准周期吸引子和排斥子在周期性的强制机械系统的任意尺寸。我们说明了这些计算的精度和效率的梁和板的有限元模型。

英文摘要:

In Part I of this paper, we have used spectral submanifold (SSM) theory to construct reduced-order models for harmonically excited mechanical systems with internal resonances. In that setting, extracting forced response curves formed by periodic orbits of the full system was reduced to locating the solution branches of equilibria of the corresponding reduced-order model. Here we use bifurcations of the equilibria of the reduced-order model to predict bifurcations of the periodic response of the full system. Specifically, we identify Hopf bifurcations of equilibria and limit cycles in reduced models on SSMs to predict the existence of two-dimensional and three-dimensional quasi-periodic attractors and repellers in periodically forced mechanical systems of arbitrary dimension. We illustrate the accuracy and efficiency of these computations on finite-element models of beams and plates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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