In this work, a new composite sandwich plate including a viscoelastic material (VEM) filling orthogrid core is proposed. Taking temperature and moisture effects into consideration, the dynamic ‘analysis for impact responses of this structure is presented. The equivalent material properties of the composite core layer are calculated using the Halpin–Tsai model. In order to model the impact force between the impactor and the structure, the modified Hertz contact law is utilized. The governing equations of the structure are derived by employing the Reddy’s higher-order shear deformation theory (HSDT) and Hamilton’s principle. Then the governing equations are solved through the Galerkin method with the aid of the Newmark direct integration scheme. After verifying the reliability and accuracy of this model, the effects of temperature, moisture, initial velocity of the impactor and boundary condition on the contact force and central deflection of the structure are discussed in detail. It has been demonstrated that changes of environmental temperature and moisture play a significant effect on the damping characteristics and impact responses of the composite sandwich plates.

在这项工作中，提出了一种新型复合材料夹层板，其中包括粘弹性材料（VEM）填充正交网格芯。考虑到温度和湿度的影响，对该结构的冲击响应进行了动态分析。使用 Halpin-Tsai 模型计算复合材料芯层的等效材料特性。为了对冲击器和结构之间的冲击力进行建模，使用了修正的赫兹接触定律。利用Reddy高阶剪切变形理论(HSDT)和Hamilton原理推导了结构的控制方程。然后借助Galerkin方法并借助Newmark直接积分格式求解控制方程。在验证了该模型的可靠性和准确性后，研究了温度、湿度、详细讨论了冲击器的初始速度以及接触力和结构中心挠度的边界条件。事实证明，环境温度和湿度的变化对复合材料夹层板的阻尼特性和冲击响应有显着影响。