Finite element analysis of the free-damped beam-stiffened plate

壳梁组合结构自由阻尼处理有限元分析(英文)

A finite element model is presented for free-damped beam-stiffened plates. The nodes of the plate elements are treated as master-nodes, and the corresponding nodes of the beam elements are considered as slave-nodes. The stiffness and mass matrices of the elements are developed. Based on the analysis of the dynamic properties of the structures, modal loss factors are predicted by the modal strain energy method. Finally, an example is given to compare the results obtained from the proposed method with the results of the ANSYS software. The results show that the method in this paper is computationally efficient, simple and feasible with high precision and engineering practicability.

构造了壳梁组合结构自由阻尼处理薄板结构的有限元模型 ,将板单元的节点作为主节点 ,梁单元的节点作为从属节点 ,推导出相应的刚度矩阵和质量矩阵 .在用有限元法进行结构动态特性分析的基础上 ,用模态变形能法估算了结构的模态损耗因子 .最后以一计算实例将本文方法所得结果与用ANSYS软件计算所得结果进行了比较 ,结果表明本文方法计算效率高、简单可行 ,且具有较高的精度和工程实用性 .