Author:

Keywords:

FM_affiliated, IOF, BATWOMAN, PDmandaat_Elke, Science & Technology, Technology, Physical Sciences, Engineering, Multidisciplinary, Mathematics, Interdisciplinary Applications, Engineering, Mathematics, Isogeometric analysis, Indirect boundary element method, Numerical acoustics, Industrial acoustics applications, 0102 Applied Mathematics, 0905 Civil Engineering, 0913 Mechanical Engineering, Applied Mathematics, 4005 Civil engineering, 4017 Mechanical engineering, 4901 Applied mathematics

Abstract:

This study presents the performance and the potential use of an isogeometric indirect variational boundary element method (IGiBEM) for industrial acoustics applications. The method is validated against semi-analytical frequency response solutions for a basic problem. After being validated, the performance of the IGiBEM is tested and benchmarked against the conventional indirect boundary element method (iBEM) for geometrically complex industrial applications. A vibrating car hood and a loudspeaker model with a vibrating woofer are used as industrial numerical tests. A non-isoparametric iBEM is included in the benchmarks to distinguish the contribution of the discretization versus the geometrical errors to overall error. The tests indicate that the geometrical errors play a more important role in problems involving complex geometries and high-frequency excitations. The study also demonstrates the advantages of IGiBEM over the conventional iBEM regarding the accuracy and computational effciency for geometrically complex problems.