抄録
In this paper, a general purpose computer code based on the boundary element method (BEM) is developed for two-and three-dimensional acoustic problems. The main analysis system employs the direct boundary element formulation expressed in terms of the pressure and the particle velocity on the boundary. The computer code can be characterized by the following features : (1) Constant, linear and quadratic boundary elements are incorporated. (2) The method of sub-regions can be applied. (3) The mixed boundary conditions can be treated. (4) The symmetrical properties of the problem can be taken into account. (5) The infinite-domain problems can be treated without any difficulty. (6) The so called fictious resonance frequency in infinite-domain problems can be totally excluded.
