网格疏密对MC模型计算精度的影响  

INFLUENCE OF MESH DENSITY ON MC CALCULATION ACCURACY

作　　者：卢阳明 乔徐峰 洪荣华[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《低温建筑技术》2015年第4期118-120,共3页Low Temperature Architecture Technology

摘　　要：在有限元计算中,结果的精确程度在很大程度上都依赖于网格的疏密程度。因而,很有必要去研究网格的疏密程度对计算结果精度的影响。本文基于摩尔库伦模型对浅基础进行了模拟,分别测试了几种不同的网格对计算结果的影响。结果表明:网格的疏密对计算结果影响很大,不同疏密程度网格模型得到的计算结果之间的差距可达50%以上,采用具有局部加密的网格模型和适当的局部网格密度对于提高计算精度是十分必要的,这样可使模型尽量地小,从而减少计算量,提高计算效率。In the finite element analysis, accurate results in a great degree depends on the grid den- sity. Therefore, it is neeessary to research the impace of the grid density on the accuracy of caleulation re- suits. In this paper, MC model simulate the shallow foundation, separately test the effects of several dif- ferent mesh on the ealeulation results. The results show that： under the great influence of grid density calculation, the gap of calculation results between different density above mesh is up to 50%, using a grid with local refinement and appropriate local mesh density to improve the precision of the calculation is very necessary, this can make the model as small as possible, thus reduee the amount of computation, improve the computational efficiency.

关 键 词：网格疏密 MC摩尔库伦 浅基础 计算精度 

分 类 号：TU471.1[建筑科学—结构工程]