Biot固结平面有限元程序网格局部加密方法研究

THE LOCAL MESH DENSIFICATION METHOD FOR 2-D FEM OF BIOT CONSOLIDATION THEORY

为了解决软土地基上的构筑物沉降过大、承载力不满足等问题 ,很多学者依据Biot固结理论编制了大量的有限元程序。要在基本相同的计算量的前题下获得足够的精度 ,需要对有限元网格进行局部加密处理。作者提出的加密方法合理解决了接触单元和多级加载问题 ,并使用C ++Builder开发工具编制了加密程序 ,最后给出一个工程实例验证了方法的可行性。

In order to solve the problems of settlement and resistance of soft soil foundation,a lot of 2 |D FEM programs based on Biot consolidation theory are written.The mesh needs to be densified to get accuracy.In this paper a practical local mesh densification method,which can deal with the problems in 2 |D FEM of Biot consolidation theory that usually interface element and multi |loads are included,is given.At last,the authors write a mesh densification program which shows the method is correct and very useful for a real project.