论文部分内容阅读
用九节点退化等参元作为复合材料板壳结构振动特性有限元分析的单元，该元素考虑了复合材料板壳的剪切变形，进行了剪切修正；并使用选择积分技术进行数值积分。沿厚度方向上的积分，采用层状模型。用波前子空间迭代法解出复合材料板壳结构的固有频率，并与解析结果进行了比较。计算结果表明该单元用于复合材料板壳的动态特性分析具有良好的精度，并大大节省内存。
The element such as the nine-node degradation is used as the element for the finite element analysis of the vibration characteristics of the composite shell structure. The element takes the shear deformation of the composite shell into consideration and carries out the shear correction. And the numerical integration with the selective integration technique is used. Integral along the thickness, layered model. The wavefront subspace iterative method was used to solve the natural frequency of the composite shell structure, and compared with the analytical results. The calculation results show that the unit has good accuracy for the dynamic analysis of the composite shell and greatly saves the memory.