The paper uses two kinds of coupling model to simulate the infinite foundation, and those are 8-node finite element coupling 8-node infinite element and 20-node coupling 12-node infinite element.

• 本论文用了两种耦合模型来模拟无限域地基，即8结点有限元与8结点无限元耦合，20结点有限元与12结点无限元耦合。