Internal forces of elastic structures are calculated by using three-node quadratic boundary element method in which displacement and traction at elastic structures boundary are more accurately depicted.

Computing the Stress Intensity Factors of Cracks Using the Multi-regional Boundary Element Method Double-mapping Singular Elements;

The topographic correction of the electric sounding data by the boundary element method for anomalous potential is discussed,and the significance effect is obtained.

Principle of the boundary element method for horizontal drills using the electrical method is deduced in detail,forward modeling in various thickness of undulated coal layers has been done,which showsthe method is practical.

This paper discusses the displacement counter-calculated method, the in-out boundary element method, the combination boundary punition element with finite element, the time series analyzing and the Grey system theory on pressure and displacement of soft rock tunnel support.

In the analysis a 2 dimension element is combined with the boundary punition element(spring element) to calculate stress distribution at the periphery of a tunnel.