| 基于边界元的非连续(块体系统)形变反分析法 |
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| 引用本文： | 吴云, 申重阳, 周硕愚, 敬少群. 基于边界元的非连续(块体系统)形变反分析法[J]. 武汉大学学报 ( 信息科学版), 2003, 28(3): 345-350. |
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| 作者姓名： | 吴云 申重阳 周硕愚 敬少群 |
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| 作者单位： | 中国地震局地震研究所, 武汉市洪山侧路40号, 430071 |
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| 基金项目： | 国家自然科学基金资助项目(40074024);国家973计划资助项目(G1998040703). |
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| 摘 要： | 以边界元法按位移解平面应力问题方法为基础,取边界单元的位移和表面力为未知参量,区域上的位移方程为观测方程,区域上测得的位移为观测值,按最小二乘原理,先解出未知参量,然后按位移方程计算区域内的位移,按应力方程计算区域内的应力场。在此基础上,应用非连续形变分析的基本原理,讨论了保证非连续块体系统运动的合理性应附加的应力和运动学约束条件及其表达形式,以及判定块体间相互接触关系状况的方法,以确定是否附加应力和运动学约束。
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| 关 键 词： | 边界元法 非连续变形 地壳形变 |
| 文章编号： | 1671-8860(2003)03-0345-06 |
| 收稿时间： | 2002-12-20 |
| 修稿时间： | 2002-12-20 |
An Inversion Method of DDA with BEM |
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| WU Yun, SHEN Chongyang, ZHOU Shuoyu, JING Shaoqun. An Inversion Method of DDA with BEM[J]. Geomatics and Information Science of Wuhan University, 2003, 28(3): 345-350. |
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| Authors: | WU Yun SHEN Chongyang ZHOU Shuoyu JING Shaoqun |
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| Affiliation: | Institute of Seismology, CSB, 40 Hongshan Road, Wuhan, China, 430071 |
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| Abstract: | On the basis of BEM (boundary element method), DDA (discontinuous deformation analysis) and Least Square Principle, a method for determining relative movements on boundaries, displacements and stresses in blocks of a multi-block system is presented, the stress and kinematic constraints required for the movement reasonability of the block system are discussed, and the judgment of the contact status between blocks is also investigated in detail, that ensures whether stress and kinematic constraints are necessary. In one word, an inversion method of DDA with BEM is provided, that would be a more effective numeric computing method for larger-scale crustal deformation analysis. |
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| Keywords: | boundary element method discontinuous deformation analysis crustal deformation |
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