Abstract
Design of mechanical structures to maximise acoustic performance is one of important factors in mechanical engineering. The design based on the trial and error approach has, however, some difficulties to obtain appropriate acoustic performance. To resolve this issue, this paper presents a level set-based topology optimisation method for three-dimensional exterior acoustic problems using the Boundary Element Method (BEM) and Fast Multiple Method (FMM). It is shown that the obtained optimal configuration by the proposed method is clear and smooth. Through a numerical example, we have confirmed the efficiency of the proposed method.
