EFFECTIVE EVALUATION OF NONSINGULAR INTEGRALS IN 3D BEM

This paper describes an investigation into the error bounds of Gauss-L egendre integration for non-singular integrals in three-dimensional bo undary element analyses. Based on these numerical results, reliable an d efficient criteria for adaptive integration routines are proposed. B ecause these criteria are in simple forms, they can be implemented wit hin boundary element algorithms without difficulty. Numerical examples have been presented to demonstrate the efficiency and accuracy of the proposed integration schemes.