Sun Xianguang, Chi Weichao, Luo Jia
Key Laboratory of Structural Dynamics of Liaoning Province, College of Sciences, Northeastern University, Shenyang 110819, China.
Beijing Institute of Structure and Environment Engineering, Beijing 100076, China.
Materials (Basel). 2022 Sep 5;15(17):6158. doi: 10.3390/ma15176158.
In this study, a novel, dynamic model of a graphene-platelet-reinforced, porous (GPLRP) double-cylindrical-panel system is proposed. The material properties of a graphene-platelet-reinforced, porous, double-cylindrical-panel system were determined by the Halpin-Tsai micromechanics model and the typical mechanical properties of open-cell metal foams. Different types of porosity distribution and graphene platelet (GPL) distribution patterns were considered. Love's shell theory was utilized to derive the theoretical formulation, and the Rayleigh-Ritz method was used to calculate the natural frequencies of the system. The proposed model was validated by several comparison studies with the natural frequencies in the existing literature. Finally, the effects of stiffness of Winkler springs, boundary condition, porosity coefficient, porosity distribution, GPL distribution pattern, and GPL weight fraction on the free vibration characteristics of the system were evaluated.
在本研究中，提出了一种新型的、动态的石墨烯片增强多孔（GPLRP）双圆柱面板系统模型。石墨烯片增强多孔双圆柱面板系统的材料特性由Halpin-Tsai微观力学模型和开孔金属泡沫的典型力学性能确定。考虑了不同类型的孔隙率分布和石墨烯片（GPL）分布模式。利用洛夫壳体理论推导理论公式，并采用瑞利-里兹法计算系统的固有频率。通过与现有文献中的固有频率进行多项对比研究，对所提出的模型进行了验证。最后，评估了温克勒弹簧刚度、边界条件、孔隙率系数、孔隙率分布、GPL分布模式和GPL重量分数对系统自由振动特性的影响。
