局部网格加密技术在混凝土裂缝扩展模拟中的应用

Applications of Local Mesh Refinement to Crack Propagation Simulation in Concrete Structures

采用有限元分析混凝土裂缝问题时,常遇到无法一步到位地确定采用什么样的剖分方案使有限元计算能到达精度要求.针对这一问题,文章提出一种局部网格加密技术,网格根据计算精度要求以及混凝土开裂位置对原有网格进行局部加密,并且利用非协调网格算法进行计算,通过2个算例证明,局部网格加密在保证达到精度要求的条件下,将会大大减少计算机计算量.

In using finite element method to analyze concrete cracking,the difficulties are how to choose the mesh to meet the precision of calculation.For this reason,a local mesh refinement technique was presented.According to the precision requirement and the lacation of concrete cracking,the raw mesh was locally refined and incompatible mesh algorithm was used.Two examples showed that the local refined mesh technique was reasonable and substantial.