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Dual reciprocity boundary element based block model for discontinuous deformation analysis

查看全文 作　　者：FU [1,2]GuoYang;MA [1,3]GuoWei;QU [1]XiaoLei 高影响力作者 机构地区：[1]School of Civil, Environmental and Mining Engineering, University of Western Australia;[2]School of Civil, Environmental and Chemical Engineering, RMIT University;[3]College of Architecture and Civil Engineering, Beijing University of Technology高影响力机构 出　　处：《Science China(Technological Sciences)》索引2015年第58卷第9期,共12页高影响力期刊 基　　金：supported by the International Postgraduate Research Scholarship(IPRS);Australian Postgraduate Award(APA)sponsored by the Australian Government via the University of Western Australia;the National Natural Science Foundation of China(Grant Nos.41130751&51178012) 摘　　要：This paper presents a further development of the dual reciprocity boundary element method(DRBEM) with stepwise updating to pave the way for the introduction of boundary element mesh into the discontinuous deformation analysis(DDA). The advantage of the proposed method lies in its adoption of static fundamental solutions and reduction in the size of the governing equations by transforming the inertial term domain integrals to boundary integrals in the dynamic large displacement analysis. The unconditionally stable Newmark-β time integration method involving numerical damping to enhance the numerical stability is implemented for the dynamic analysis. In order to be coupled with the DDA to improve the deformability of the DDA block domains, a stepwise updating algorithm of the system variables is introduced. The stress updating in the analysis involved in the calculation of a domain integral and internal cells are used for the integration of the initial stress term. Several examples are used to verify the geometry-updated DRBEM model and satisfactory results have been obtained. 关 键 词：非连续变形分析方法 双倒易边界元方法 元模型 边界积分 初始应力 无条件稳定 DDA 控制方程
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