彭翀, 袁会娜, 张丙印. 无网格自动加密方法及其在土体裂缝分析中的应用[J]. 工程力学, 2013, 30(6): 231-235. DOI: 10.6052/j.issn.1000-4750.2012.03.0145
引用本文: 彭翀, 袁会娜, 张丙印. 无网格自动加密方法及其在土体裂缝分析中的应用[J]. 工程力学, 2013, 30(6): 231-235. DOI: 10.6052/j.issn.1000-4750.2012.03.0145
PENG Chong, YUAN Hui-na, ZHANG Bing-yin. AUTOMATIC NODE REFINEMENT FOR MESHFREE METHOD AND ITS APPLICATION IN SOIL CRACK ANALYSIS[J]. Engineering Mechanics, 2013, 30(6): 231-235. DOI: 10.6052/j.issn.1000-4750.2012.03.0145
Citation: PENG Chong, YUAN Hui-na, ZHANG Bing-yin. AUTOMATIC NODE REFINEMENT FOR MESHFREE METHOD AND ITS APPLICATION IN SOIL CRACK ANALYSIS[J]. Engineering Mechanics, 2013, 30(6): 231-235. DOI: 10.6052/j.issn.1000-4750.2012.03.0145

无网格自动加密方法及其在土体裂缝分析中的应用

AUTOMATIC NODE REFINEMENT FOR MESHFREE METHOD AND ITS APPLICATION IN SOIL CRACK ANALYSIS

  • 摘要: 将无网格法和弥散裂缝模型结合用于裂缝分析时,需要较细密的节点分布。为了准确描述土体裂缝开展,提出了一种无网格自动加密方法。通过在等参单元上布点后变换到实际的背景积分单元中,实现了裂缝开展区域的局部加密。在背景积分单元中使用有限元插值来计算新增节点和高斯积分点的状态变量。将提出的方法与弥散裂缝模型相结合,可用于土体裂缝的分析。对土梁弯曲试验进行模拟计算,验证了方法的有效性。

     

    Abstract: When applied to crack analysis,the meshfree method requires a dense node distribution to get satisfactory result.An automatic node refinement procedure is presented in this paper for better describing crack propagation.The crack area is refined by generating nodes in isoparametric elements and then transferring them into corresponding background integration elements.The state values at new nodes and gauss integration points are obtained using finite element interpolation.Combining with the smeared crack model,the presented method can be used to simulate crack propagation in soil.A soil beam bending test is analyzed to demonstrate the effectiveness of the proposed method.

     

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