拱坝动力特性的三维有限单元法计算

• 作 者: 王良琛
• 机 构: 广东省地震局,
• 出 处: 水利水运科学研究
• 发表日期: 1980年02期
• 关键词: 拱坝 动力特性 有限单元法 四面体 计算机容量 三棱柱 结构划分 六面体 结构振动 运行时间

一、单元的选择目前,在国内进行空间结构振动问题的分析时,最突出的矛盾往往是问题的庞大与计算机容量和稳定运行时间之间的不相适应。为解决这一矛盾,需要从单元选择、存贮方案及方程解法进行全面的考虑。空间结构一般形体较复杂,如采用简单的四面体单元或以四面体为基础的组合单元(折面三棱柱、六面体),由于在四面体内应力是常量,那么,为了反映结构和应力在空间上的变化,势必要将结构划分成很多个单元,结果整

First, the choice of unit At present, when analyzing the problem of spatial structure vibration in China, the most prominent contradiction is often the incompatibility between the huge problem and the computer capacity and stable operation time. In order to solve this contradiction, we need to consider comprehensively the unit selection, storage solution and equation solution. The general structure of space structure is more complex, such as the use of simple tetrahedral units or tetrahedron-based combination of units (flanged triangular prism, hexahedron), due to the constant stress in the tetrahedron, then, in order to reflect the structure and stress in space Changes, it is necessary to divide the structure into many units, and the result is a whole