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large strain consolidation lsc
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     The strain of B.N.
     N .
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     The Grid Method for Large Strain
     网格法用于大应变的确定
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     Design of Large Strain Sheath Extensometer
     大应变鞘形引伸计的设计
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     , and textual (e.g. by and large).
     和语篇搭配(如by and large)。
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     1565 strain.
     1565菌株进行诱变处理,选育到一株性能较优良的突变株。
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Follow in precursory relating documents, several equations of one dimension Large Strain Consolidation (LSC) and consolidation coefficients were discussed firstly. Based on this, a Finite Difference Method (FDM) equation was derived, which was the physical described LSC equation with variable displacement. Moreover, the initiate and boundary condition were dispersed by FDM, and the boundary of different layers of super soft soil was disposed of continuity. Finally,nonlinear...

Follow in precursory relating documents, several equations of one dimension Large Strain Consolidation (LSC) and consolidation coefficients were discussed firstly. Based on this, a Finite Difference Method (FDM) equation was derived, which was the physical described LSC equation with variable displacement. Moreover, the initiate and boundary condition were dispersed by FDM, and the boundary of different layers of super soft soil was disposed of continuity. Finally,nonlinear group equations of LSC FDM solution was deduced for multi layers super soft ground by repeated method, and a FDM program of 1D nonlinear LSC analysis was compiled. Finally, a case showed a satisfied analysis result by LSCFDM.

对一维大变形固结方程及固结系数进行了讨论 ,在此基础上建立了以位移为控制变量物质描述下单向大变形固结方程的有限差分法方程 ,对其初始条件和边界条件进行有限差分离散 ,对不同超软土层间的边界进行连续性处理 ,最后形成了多层超软土大变形固结有限差分解的非线性方程组 ,并对其采用迭代法求解 ,在此基础上编制调试了计算程序LSCFDM作算例分析 ,得到与实测数据相一致的结果

In traditional large strain analysis of roadbed consolidation, the constitutive relation with Jaumann stress rate is used, which can not consider neighborhood-deformation. In this paper, Truesdell stress rate considering not only rigid-body motion but also neighborhood-deformation was introduced into large strain consolidation (LSC) theory. Using both virtual work principle and Galerkin’s weighted residual method, the finite element formulations for LSC were derived,...

In traditional large strain analysis of roadbed consolidation, the constitutive relation with Jaumann stress rate is used, which can not consider neighborhood-deformation. In this paper, Truesdell stress rate considering not only rigid-body motion but also neighborhood-deformation was introduced into large strain consolidation (LSC) theory. Using both virtual work principle and Galerkin’s weighted residual method, the finite element formulations for LSC were derived, based on constitutive relations following objectivity principle. The corresponding plane-strain FEM programs were compiled and tested. The influences of Truesdell, Jaumann and simplified Jaumann stress rates on roadbed consolidation were mainly discussed. The results show that the settlement, lateral displacement and pore-water pressure calculated by traditional method are greater than those by the method based on the constitutive relation using Truesdell stress rate. The considerable magnitude of errors may occur for the case of using small-strain constitutive matrix, due to the dissatisfaction with objectivity principle. As far as common problems are concerned, the differences between the results by Jaumann or Truesdell stress rate could be neglected; and the traditional method is adequately accurate for the case of small deformation.

针对路基大变形固结分析中常用的Jaumann率型本构关系不能考虑邻域变形之影响的缺点,将Truesdell率型本构关系引入到大变形固结理论。采用虚功原理和Galerkin加权残值法,推导了基于不同客观本构关系的大变形固结有限元方程。编制相应的平面应变有限元程序对路基大变形固结性状进行分析,主要讨论了Truesdell率型、Jaumann率型、简化Jaumann率型等3种大变形本构关系对路基固结性状的影响。算例分析结果表明:基于常用的Jaumann率型本构关系的大变形固结分析得到的路基沉降量、侧向位移和孔压等均偏大于基于Truesdell率型本构关系时的相应结果。小变形本构矩阵不能反映客观性要求,将导致计算结果产生较大偏差。对常见问题而言,Jaumann率型和Truesdell率型本构关系对计算结果的影响并不很大,传统分析方法在变形较小时仍具有较高精度。

 
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