摘要
有限元分析在工程上已得到广泛应用,有限元网格划分是进行有限元数值模拟分析至关重要的一步,它直接影响着后续数值计算分析结果的精确性。针对有限元分析中单元不同长宽比网格划分所产生的误差进行了分析研究,提出了有限元模拟中单元的长宽比网格划分所产生的误差估算方法,通过实证计算分析研究得出单元长宽比网格划分对计算结果具有重要影响,建立了单元不同长宽比对计算结果误差影响的边界指标,且指出单元长宽比的影响程度受单元形状影响较大,分析研究结果具有重要的现实指导作用和理论价值。
The finite element analysis widely used in projects, the finite element grid division is a very important step of the hnlte element value simulation analyses, it is directly affecting the accuracy of the following value computation analytical results. This paper conducts a study of sensitivity to mesh distortion of isoparameter elements, proposes the finite element error estimation method, reaches the conclusion that unit grid division has a very important influence on computation results through the real diagnosis computation research, establishes the boundary target which affects computation errors related to different length and breadth ratio units. It also points out that the influence of the computation result error on unit length and breadth ratio is bigger because of the influence of unit shape, the findings have very important functions and they are theoretically valuable.
出处
《中国农村水利水电》
北大核心
2010年第2期108-110,113,共4页
China Rural Water and Hydropower
关键词
有限元
网格划分
奇异网格
finite element
grid division
mesh distortion
