中文摘要：

结合离散单元法与有限差分法发展了离散–连续耦合分析方法。在中心区域采用离散元分析,其周围区域采用有限差分法分析。采用离散元中颗粒接触计算模型计算离散–连续交界面处的颗粒与单元相互接触作用,在连续单元中接触点速度按型函数对交界面处的节点速度进行插值,将与颗粒的接触力按权值函数分配到交界面节点上。通过PFC和FLAC的Socket I/O接口,实现二维离散–连续耦合分析,并通过对二维算例分析,表明了该耦合分析方法的有效性。

英文摘要：

A coupling method of two-dimensional discontinuum-continuum is proposed based on the combination of the discrete element method（DEM） and the finite difference method（FDM）.The DEM is used in the focus zone,and the finite difference method is used in the surrounding zone.The contact between the finite elements and the particle at the boundary edges follows the principles defined in the DEM.In the continuum element,the velocities at the contact point are related to the nodal velocities by interpolation,and the contact forces are contributed to the nodal forces with weight value.The FLAC and PFC are introduced to approach the coupling method by the socket connection.An example is presented to demonstrate the validity of the present method.