弹性地基板的无界边界元──有限元耦合计算法

A CALCULATION METHOD OF COUPLING INFINITE BE AND FE FOR PLATE BASED ON ELASTIC HALF SPACE

本文应用无界边界元－有限元耦合法对弹性地基上的薄板进行了计算。弹性薄板采用有限元离散，弹性半无限地基应用边界元离散，并应用无界边界元模拟半无限体表面的无限性，通过板与基础接触面位移和力的协调性（光滑接触），建立了弹性地基和板的综合算式。计算结果表明，本文方法具有工作量少、精度高等优点，非常适合于机场道面工程及其它基础工程。

Using the method of coupling infinite BE and FE, the authors have calculated the thin plate based on elastic half space. The elastic thin plate is treated by FE,the elastic half space treated by BE, and the infinite BE is used to treat the infinite boundary. We get the comprehensive matrix equations considing the compatible conditions on the surface of the plate and the foundation. The results show that the method has many advantages and is very suited for pavement and other foundation engineerings.