基于流固耦合的新拌混凝土流动及变形仿真方法.pdfVIP

42 12 上 海 交 通 大 学 学 报 Vol. 42 No. 12 2008 12 JOU RNAL OF SH ANGHAI JIAOT ONG UNIVERSITY Dec. 2008 : 2008) 12199 04 1 1, 2 1 杜新光 , 金先龙 , 陈向东 ( 1. , 200240; 2. , 200240) : 为了能更好地评估新拌混凝土的流变 性, 通过流固耦合的方法对新拌混凝土进行建模 和仿真. 针对混凝土拌合物无自由边界和大变形的 点, 采用 ALE 方法描述新拌混凝土拌合物, 拉格朗日方法描述装盛混凝土的容器结构, 结合罚函数法实现液态混凝土与结构间的耦合作用. 分 别对高性能混凝土和自密实混凝土的坍落度试验进行了模拟计算, 通过与实测及已有文献的计算 结果相比较, 验证了该方法的有效性. : 新拌混凝土; 坍落度试验; ALE 有限元方法; 流固耦合 : TP 91. 9 : A Flow and Deformat ion Simulat ion of Fresh Concrete Based on FluidSolid Interaction Met hod 1 1, 2 1 D U X inguang , J I N X ianlong , CH EN X iangdong ( 1. H igh Performance Computing Center, Shanghai Jiaotong University, Shanghai 200240, China; 2. State Key Laboratory of Vibration, Shock Noise, Shanghai Jiaotong U niversity , Shanghai 200240, China) Abstract: In order to evaluate the flow ability of fresh concrete, the fluidsolid interaction method w as ap plied in the simulation of deformation and flow of fresh concrete. In view of the characteristic of none free dom boundary and large distortion of fresh concrete, the concrete mixture w as described through ALE method, the structure of container w as expressed by Lagrangian method and the couple effect betw een con crete flow and structure w as achieved in terms of the penalty function method. T he slump tests of high performance concrete and selfcompacting concrete w ere simulated respectively, the results of w hich w ere compared w ith those from literature and practical test, proving the validity of this method. Key words: fresh concrete; slump test; A LE finite method; fluidsolid