This work is devoted to the robust analysis of the effects of geometric nonlinearities on the nonlinear dynamic behavior of rotating detuned (intentionally mistuned) bladed disks in presence of unintentional mistuning (simply called mistuning). Mistuning induces uncertainties in the computational model, which are taken into account by a probabilistic approach. This paper presents a series of novel results of the dynamic behavior of such rotating bladed disks exhibiting nonlinear geometric effects. The structural responses in the time domain are analyzed in the frequency domain. The frequency analysis exhibits responses outside the frequency band of excitation. The confidence region of the stochastic responses allows the robustness to be analyzed with respect to uncertainties and also allows physical insights to be given concerning the structural sensitivity. The bladed disk structure is made up of 24 blades for which several different detuned patterns are investigated with and without mistuning.

中文翻译：

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具有几何非线性的失谐失谐旋转叶片盘的鲁棒动力学分析

这项工作致力于在存在无意失谐（简称失谐）的情况下，对几何非线性对旋转失谐（有意失谐）叶片盘的非线性动态行为的影响进行稳健分析。失谐会导致计算模型中的不确定性，这是由概率方法考虑的。本文介绍了这种表现出非线性几何效应的旋转叶盘的动态行为的一系列新结果。在频域中分析时域中的结构响应。频率分析显示了激励频带之外的响应。随机响应的置信区域允许针对不确定性分析稳健性，并且还允许给出关于结构敏感性的物理见解。叶片盘结构由 24 个叶片组成，在有和没有失谐的情况下研究了几种不同的失谐模式。