“另类单元生死”在大坝等结构施工仿真中的应用

Application of "Special Element Birth and Death" in the Construction Simulation of Dams and Other Structures

ABAQUS/Explicit显式有限元适用处理高度非线性事件,但是ABAQUS/Explicit没有类似于隐式有限元的"单元生死"。为此,提出通过ABAQUS/Explicit模块中有限元模型和应力变形场等数据传递方式来模拟"单元生死",并将此方式定义为"另类单元生死"法。然后基于"另类单元生死"法,模拟了小湾拱坝的施工过程。计算结果与Ansys隐式计算相差不大,表明在ABAQUS/Explicit显式有限元计算中,用"另类单元生死"法模拟施工正确而且实用。

ABAQUS/Explicit explicit finite element is suitable for solving highly nonlinear problems, but there is no＂ element birth and death＂ similar to implicit finite element. Simulating ＂element birth and death＂ is proposed herein by the way of data transmission, such as finite element model and stress and deformation field in ABAQUS/Explicit module and the way is defined as the method of ＂special element birth and death＂. The method is applied in the construction process simulation of Xiaowan Arch Dam. The results are less difference with the implicit results of Ansys. The results show that the application of ＂special element birth and death＂ in ABAQUS/Explicit explicit finite element calculation is practical for simulating the construction process.