Boundary Element Method for 2D Non-homogeneous Helmholtz Equation

A direct boundary element method based on the basic solution of the Laplace equation for solving two-dimensional non-homogeneous Helmholtz equation is described in this paper.The fundamental solution of the Laplace equation and Green formula was used after the distortion of the Helmholtz equation to obtain the direct integral equation.Aiming at the concurrence of the region integral subentry and the boundary integral subentry in the integral eqution,coupling of the integral equations about the points in the region and those on the boundary were used when the boundary element method was applied to solve the problem.Finally,validity of the method is discussed by an example.