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裂隙岩体变渗透系数流固耦合分析
发表时间：2010-02-15 浏览量：2262 下载量：760
| 全部作者： | 陈敬运，刘仲秋，刘明 |
| 作者单位： | 河海大学土木工程学院；山东农业大学水利土木工程学院 |
| 摘 要： | 岩体渗透系数作为连接渗流场与应力场的桥梁在流固耦合分析中具有重要作用。根据岩体受力状态的不同，将渗透系数分别定义为应力和塑性应变的函数，能够相对合理地模拟渗透系数的演化规律。将裂隙岩体等效为连续多孔介质，并建立相应的渗流应力耦合模型。最后，利用商业软件ABAQUS二次开发接口编制相应的USDFLD子程序，实现了渗透系数的动态变化，并将该程序应用到某引水隧洞的开挖工程中，相对合理地模拟隧洞开挖过程中的渗流应力耦合过程，较好地反映了渗流应力耦合中的“间接耦合”效应，计算成果与实际工程情况也更为相符，为该类工程设计与施工提供了理论借鉴。 |
| 关 键 词： | 渗流力学；流固耦合；二次开发；渗透系数；ABAQUS |
| Title： | Hydro mechanical coupling analysis of fractured rock mass with changeable transmissibility coefficient |
| Author： | CHEN Jingyun, LIU Zhongqiu, LIU Ming |
| Organization： | College of Civil Engineering, Hohai University；College of Water Conservancy and Civil Engineering |
| Abstract： | As the connection bridge between seepage field and stress field, transmissibility coefficient plays an important role in hydro�mechanical coupling analysis. According to the forced state of rock mass, transmissibility coefficient was defined as the function of stress and strain which can reflect the evolution law of it. Regarding the fractured rock mass as continuous porous media, and built the model of hydro�mechanical coupling, then compiled subroutine of USDFLD by use of second development interface of ABAQUS, dynamic change of transmissibility coefficient was realized. Applying the program to a water diversion tunnel excavation project can reflect ‘indirect coupling’ effect. The calculation result is more consistent with the actual project situation, and provides theoretical reference for engineering design and construction. |
| Key words： | seepage mechanics; hydro�mechanical coupling; second development; transmissibility coefficient; ABAQUS |
| 发表期数： | 2010年2月第3期 |
| 引用格式： | 陈敬运，刘仲秋，刘明. 裂隙岩体变渗透系数流固耦合分析[J]. 中国科技论文在线精品论文，2010，3（3）：309-313. |
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