Simulation of Exterior Acoustic Transfer Functions on an Engine-Bay Mock-Up With BE and AML Methods

This oral contribution describes a numerical/experimental activity aimed at comparing the performance of both well-known and innovative deterministic analysis methods, such as Boundary Elements, Finite Elements, Infinite Elements, Wave Based and Patch Transfer Functions methods. The objective of the simulations consists in evaluating the exterior Acoustic Transfer Functions of a simplified (but not trivial) vehicle engine bay mock-up in a broad frequency range up to 3.5 kHz. In particular this contribution intends to focus on modelling characteristics and analysis performance comparison between BEM and FEM-IFEM methods implemented by LMS. The last code algorithmic developments have been tested, such as Fast Multipole accelerator and PML/AML properties, in order to speed up computation time dealing with complex simulation models of a few millions elements. Different solution procedures have been checked, taking advantage of available direct & iterative solvers