Damping Characteristics of Bending Vibration of Thick-Walled CFRP Hollow Shafts

Yang, Mujie; Zhou, Xiuqing; Zhou, Yuebin; Qin, Tao; Ye, Jianmin; Lyu, Xujun

doi:10.1142/s0219455420500893

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…Equivalent damping coefficient of the composite shaft. Previous research on the damping loss factor of composite shafts 30 showed that composite shafts also have orthotropic properties in terms of bending damping. The specific damping capacity (SDC) matrix can be used to describe each composite layer.…”

Section: Equivalent Coefficient Of the Composite Shaftmentioning

confidence: 99%

“…The smaller orientation angle is beneficial in improving the bending stiffness of the composite shaft, while the 6 45°layers maximize the damping ratio. 30,32 . Therefore, in this paper, 6 15°, which has the greatest effect on stiffness enhancement, and 6 45°, which makes the greatest contribution to damping, are selected as the typical fiber orientation angles for design of the laminate schemes.…”

Section: Analysis Of Nonlinear Dynamic Characteristicsmentioning

confidence: 99%

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Effect of laminate parameters on nonlinear dynamic characteristic of the composite rotor-bearing system with pedestal looseness

Yang,

Xuan,

Qin

et al. 2023

Advances in Mechanical Engineering

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The nonlinear dynamics of the composite shaft rotor-bearing system are greatly affected by the orientation angle layer and its proportion of the ply, i.e., the ratio of the orientation angle layer in the laminate. This paper presents a nonlinear dynamic analysis of a composite rotor-bearing system with pedestal looseness that considers the nonlinear oil film force and the pedestal looseness. Nonlinear phenomena including periodic, quasi-periodic, and chaotic motions are analyzed. The analysis results indicate that the stiffness and damping coefficients of a composite shaft tube can be influenced strongly by the laminate parameters, which can in turn affect the instability speed of the rotor system. To enhance the oil film instability speed of the composite rotor system, it is essential to maximize the ratio of the small orientation angle layer or the ±45° layer. Additionally, increasing the ratio of the small orientation angle layers in the shaft tube leads to a higher rotational speed for loosening instability. The research results obtained in this paper have important theoretical value for the design of composite rotor-bearing systems.

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Section: Equivalent Coefficient Of the Composite Shaftmentioning

confidence: 99%

Section: Analysis Of Nonlinear Dynamic Characteristicsmentioning

confidence: 99%

Effect of laminate parameters on nonlinear dynamic characteristic of the composite rotor-bearing system with pedestal looseness

Yang,

Xuan,

Qin

et al. 2023

Advances in Mechanical Engineering

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Multiscale simulation and experimental studies on modal damping of ultra‐thick CFRP laminates

Yan,

Li,

et al. 2024

Polymer Composites

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The vibration characterization of ultra‐thick laminates widely used in aerospace and marine industries was different from that of thin laminates. However, modal testing and simulation methods were generally limited to relatively thin laminates. To explore the vibration behavior of ultra‐thick laminates, a novel multiscale simulation technology based on the representative volume modal strain energy (RVMSE) method is presented for predicting modal damping in this paper. The adaptive Greedy‐Based Generation (GBG) algorithm is used to create a 3D random distribution of fibers for composites. Modal shape information of the structure is obtained according to the Lanczos algorithm, which is used as an input parameter for the microscopic model. This is followed by homogenization based on the volumetric analysis performed on representative volume elements (RVEs) to determine the strain energy in six directions. The calculation of modal damping is performed by using the modal strain energy (MSE) method and the damping properties of the six directions. The fast rate of convergence and high accuracy of the method are demonstrated through different examples. The vibration response predictions produced by novel RVMSE methodology are shown to closely match experimental measurements, providing scope to expand the application of this approach to more complex, ultra‐thick laminate components.Highlights The RVMSE method uses a higher level of homogenization to overcome the limitations of the traditional MSE method for calculating the damping of ultra‐thick CFRP laminates. The modal parameter error is controlled to less than 10%, and the experimental results fill the gap of the damping data of ultra‐thick CFRP structure. The proposed RVMSE model improves the accuracy of dynamic response prediction for ultra‐thick laminates.

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Stability analysis and enhancement of five-degree-of-freedom composite spindle with active magnetic bearing support

Benali,

Ben Jdidia,

Hentati

et al. 2024

Int J Interact Des Manuf

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Damping Characteristics of Bending Vibration of Thick-Walled CFRP Hollow Shafts

Cited by 5 publications

References 17 publications

Effect of laminate parameters on nonlinear dynamic characteristic of the composite rotor-bearing system with pedestal looseness

Effect of laminate parameters on nonlinear dynamic characteristic of the composite rotor-bearing system with pedestal looseness

Multiscale simulation and experimental studies on modal damping of ultra‐thick CFRP laminates

Stability analysis and enhancement of five-degree-of-freedom composite spindle with active magnetic bearing support

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