Abstract This article presents a theoretical, numerical and experimental study of resonant structures undergoing very large amplitude vibrations. The purpose of this work is to validate a model for the damping due to the action of the air on a structure’s single-mode response in the steady-state. Experiments are performed on cantilever beams and beam assemblies of various sizes, from centimetric to micrometric, under harmonic base excitation. Dimensionless linear and nonlinear modal damping coefficients are simultaneously identified by means of frequency-domain identification techniques. These measurements demonstrate the pertinence of the presented model.

中文翻译：

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柔性结构的超大振幅振动：二次阻力阻尼模型的实验识别和验证

摘要 本文介绍了承受超大振幅振动的共振结构的理论、数值和实验研究。这项工作的目的是验证由于空气对稳态下结构单模响应的作用而产生的阻尼模型。在谐波基础激励下，对从厘米到微米的各种尺寸的悬臂梁和梁组件进行了实验。通过频域识别技术同时识别无量纲线性和非线性模态阻尼系数。这些测量证明了所提出模型的相关性。