The damping characteristics of the composite thick-walled hollow shaft directly affect its amplitude of rotational vibration at low speeds and stability at high speeds. In this study, the shaft is made of carbon fiber reinforced plastic (CFRP) material. In order to study the damping characteristics of the composite hollow shaft, a 3D numerical damping model was established based on finite element method and strain energy expression. In this regard, both the contributions of in-plane and out-of-plane strain energy dissipation were studied. Then, the validity of 3D damping model in bending was verified by experiments. On this basis, the flexural damping characteristics of the thick-walled composite shaft were studied, and the effects of orientation angle and stacking sequences on the flexural damping were obtained.

中文翻译：

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厚壁CFRP空心轴弯曲振动的阻尼特性

复合厚壁空心轴的阻尼特性直接影响其在低速时的旋转振动幅度和高速时的稳定性。在这项研究中，轴由碳纤维增强塑料 (CFRP) 材料制成。为研究复合空心轴的阻尼特性，基于有限元法和应变能表达式建立了3D数值阻尼模型。在这方面，研究了面内和面外应变能耗散的贡献。然后，通过实验验证了3D阻尼模型在弯曲中的有效性。在此基础上，研究了厚壁复合轴的弯曲阻尼特性，得到了取向角和叠层顺序对弯曲阻尼的影响。