The main purpose of this paper is to perform dynamic analysis of a viscoelastic laminated composite rotor shaft considering various asymmetries. Equivalent modulus theory (EMT) is employed to derive the finite element based mathematical model of the composite shaft considering the shear effect and compared with other method known as direct procedure technique (DPT). The material damping behaviour of the composite shaft is incorporated using operator-based approach, which leads to a higher-order model. Fibre-reinforced composite sample of single layer and 8 layer are fabricated and tested in dynamic mechanical analyser to obtain frequency-dependent material data and viscoelastic parameters. EMT uses single layer properties, while modelling of DPT is done considering equivalent 8 layer sample. The closeness of numerical results between two methods proves the authentication of the applied EMT for modelling of damped heterogeneous laminated composite shaft.

本文的主要目的是在考虑各种不对称性的情况下对粘弹性叠层复合转子轴进行动力分析。等效模量理论（EMT）用于考虑剪切效应并与其他称为直接过程技术（DPT）的方法进行比较，从而得出基于复合材料轴的有限元数学模型。复合材料轴的材料阻尼行为是通过基于操作员的方法来合并的，这导致了更高阶的模型。制作了单层和八层的纤维增强复合材料样品，并在动态力学分析仪中进行了测试，以获得随频率变化的材料数据和粘弹性参数。EMT使用单层属性，而DPT的建模要考虑等效的8层样本。