考虑围压衰减时管涌动态模型研究及数值计算  

Study on Piping's Dynamic Model and It's Numerical Calculation Considering Sediment's Circumambient Pressure Attenuation

作　　者：张忠云[1] 柴军瑞[1] 

机构地区：[1]三峡大学土木水电学院,湖北宜昌443002

出　　处：《水电能源科学》2008年第4期70-73,共4页Water Resources and Power

基　　金：国家自然科学基金委员会、二滩水电开发有限责任公司雅砻江水电开发联合研究基金资助项目(50579092);教育部新世纪优秀人才支持计划基金资助项目(NCET-05-0679);三峡大学湖北省楚天学者计划特聘教授基金资助项目(603108);三峡大学科技创新团队基金资助项目(603402)

摘　　要：管涌破坏发展的动态过程是个复杂而随机的过程。颗粒在形成管涌起动前与周围颗粒的作用力存在随时间衰减的过程,管涌形成前后由于约束的变化及渗透力作用下颗粒位移的徐变是围压衰减的根本原因。对处于渗流场中的泥沙颗粒间的作用及与流体的相互作用机理和规律进行了分析,提出了泥沙起动形成管涌的必要条件,并通过有限元法的数值计算模拟了管涌破坏发展的动态过程。The dynamic process of piping development is a complicated and random one. The sediment＇s circumambient pressure is attenuated before it will move. The necessary condition when the sediment begins moving and becomes forming pipe was introduced. The reason is the restriction variety and displacement about the two conditions . The mechanism and rule about the interaction between the sediments and the fluid in the flow though the porous media was studied. The partial parameter in the condition was discussed and compared with others. Then, numerical computation was put into practice with the finite element method and the dynamic process about the destruction of the piping was modeled.

关 键 词：围压衰减 管涌动态模型 数值计算 

分 类 号：TV871[水利工程—水利水电工程]