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Frequency veering and nonlinear coupled vibration analysis of variable stiffness composite plates with curvilinear fiber paths
https://orcid.org/0000-0003-0982-5175
Highlights A semi-analytical model of variable stiffness plates with curvilinear fiber paths described by higher order polynomials is established. The frequency veering and modal interaction of variable stiffness plates caused by curvilinear fiber paths are studied. The variation rule of modal coupling vibration for variable stiffness plates at veering regions is analyzed. The combined effects of material nonlinearity and modal interaction on variable stiffness plates are studied.
Abstract The coupling forced vibration behaviors of a variable stiffness plate with curvilinear fiber paths at mode veering regions caused by variations of fiber angle have been rarely found in previous papers, especially in the presence of considering the complex material nonlinearity of composite materials. In this paper, the variable stiffness plate of carbon fiber reinforced composites (CFRC) with curvilinear fiber paths is taken as the research object, and the influence of curvilinear fiber paths on its natural characteristics and vibration responses are studied in detail on the basis of considering the material nonlinearity of CFRC. Firstly, it is found that the variations of curvilinear fiber paths can cause complex frequency veering behavior of the variable stiffness plate, and lead to the appearance of irregular modal shapes formed by modal interaction. Then, the forced vibration response of the variable stiffness plate in the frequency veering region is analyzed methodically, and the variation rules of the vibration response under modal interaction is obtained. After analyzing the nonlinear vibration response of the variable stiffness plate under the combined influence of modal interaction and CFRC material nonlinearity, the mechanism of complex nonlinear dynamic behavior of variable stiffness plate in frequency veering region is further investigated.
Graphical abstract Display Omitted
Frequency veering and nonlinear coupled vibration analysis of variable stiffness composite plates with curvilinear fiber paths
https://orcid.org/0000-0003-0982-5175
Highlights A semi-analytical model of variable stiffness plates with curvilinear fiber paths described by higher order polynomials is established. The frequency veering and modal interaction of variable stiffness plates caused by curvilinear fiber paths are studied. The variation rule of modal coupling vibration for variable stiffness plates at veering regions is analyzed. The combined effects of material nonlinearity and modal interaction on variable stiffness plates are studied.
Abstract The coupling forced vibration behaviors of a variable stiffness plate with curvilinear fiber paths at mode veering regions caused by variations of fiber angle have been rarely found in previous papers, especially in the presence of considering the complex material nonlinearity of composite materials. In this paper, the variable stiffness plate of carbon fiber reinforced composites (CFRC) with curvilinear fiber paths is taken as the research object, and the influence of curvilinear fiber paths on its natural characteristics and vibration responses are studied in detail on the basis of considering the material nonlinearity of CFRC. Firstly, it is found that the variations of curvilinear fiber paths can cause complex frequency veering behavior of the variable stiffness plate, and lead to the appearance of irregular modal shapes formed by modal interaction. Then, the forced vibration response of the variable stiffness plate in the frequency veering region is analyzed methodically, and the variation rules of the vibration response under modal interaction is obtained. After analyzing the nonlinear vibration response of the variable stiffness plate under the combined influence of modal interaction and CFRC material nonlinearity, the mechanism of complex nonlinear dynamic behavior of variable stiffness plate in frequency veering region is further investigated.
Graphical abstract Display Omitted
Frequency veering and nonlinear coupled vibration analysis of variable stiffness composite plates with curvilinear fiber paths
https://orcid.org/0000-0003-0982-5175
Highlights A semi-analytical model of variable stiffness plates with curvilinear fiber paths described by higher order polynomials is established. The frequency veering and modal interaction of variable stiffness plates caused by curvilinear fiber paths are studied. The variation rule of modal coupling vibration for variable stiffness plates at veering regions is analyzed. The combined effects of material nonlinearity and modal interaction on variable stiffness plates are studied.
Abstract The coupling forced vibration behaviors of a variable stiffness plate with curvilinear fiber paths at mode veering regions caused by variations of fiber angle have been rarely found in previous papers, especially in the presence of considering the complex material nonlinearity of composite materials. In this paper, the variable stiffness plate of carbon fiber reinforced composites (CFRC) with curvilinear fiber paths is taken as the research object, and the influence of curvilinear fiber paths on its natural characteristics and vibration responses are studied in detail on the basis of considering the material nonlinearity of CFRC. Firstly, it is found that the variations of curvilinear fiber paths can cause complex frequency veering behavior of the variable stiffness plate, and lead to the appearance of irregular modal shapes formed by modal interaction. Then, the forced vibration response of the variable stiffness plate in the frequency veering region is analyzed methodically, and the variation rules of the vibration response under modal interaction is obtained. After analyzing the nonlinear vibration response of the variable stiffness plate under the combined influence of modal interaction and CFRC material nonlinearity, the mechanism of complex nonlinear dynamic behavior of variable stiffness plate in frequency veering region is further investigated.
Graphical abstract Display Omitted
Frequency veering and nonlinear coupled vibration analysis of variable stiffness composite plates with curvilinear fiber paths
Liu, Xiaofeng (author) / Sun, Wei (author) / Liu, Honghao (author) / Du, Dongxu (author) / Ma, Hongwei (author)
Thin-Walled Structures ; 194
2023-10-30
Article (Journal)
Electronic Resource
English
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