Recent advances in acoustic boundary element methods

S Preuss, C Gurbuz, C Jelich, SK Baydoun… - Journal of Theoretical …, 2022 - World Scientific
The modern scope of boundary element methods (BEM) for acoustics is reviewed in this
paper. Over the last decades the BEM has gained popularity despite suffering from …

Sound radiation and non-negative intensity of a metaplate consisting of an acoustic black hole plus local resonators

J Deng, O Guasch, L Maxit, N Gao - Composite Structures, 2023 - Elsevier
While acoustic black holes (ABHs) are well-known inefficient at low frequencies. However,
attaching periodic local resonators to form a metamaterial ABH (MMABH) plate could be …

Vibroacoustic mitigation for a cylindrical shell coupling with an acoustic black hole plate using Gaussian expansion component mode synthesis

J Deng, N Gao, L Tang, H Hou, K Chen, L Zheng - Composite Structures, 2022 - Elsevier
In this paper, we consider a composite cylindrical shell having an internal thin plate. When
some ABHs are embedded on the interior floor, the vibration of the cylindrical shell and the …

Subdivision surfaces—boundary element accelerated by fast multipole for the structural acoustic problem

L Chen, C Lu, W Zhao, H Chen… - Journal of Theoretical and …, 2020 - World Scientific
A novel boundary element method based on subdivision surfaces is applied to simulate
wave scattering problems governed by the Helmholtz equation. The Loop subdivision …

Energy density-based non-negative surface contributions in interior acoustics

C Gurbuz, JD Schmid, M Luegmair… - Journal of Sound and …, 2022 - Elsevier
Vibrating structures have received considerable critical attention as they radiate sound into
enclosures where it is amplified by reflections. Surface and panel contribution analyses …

[HTML][HTML] Effect of boundary conditions in the experimental determination of structural damping

CA Geweth, SK Baydoun, F Saati, K Sepahvand… - … Systems and Signal …, 2021 - Elsevier
Building a digital twin representing the dynamical behaviour of a structure requires
knowledge of its material and geometrical properties. While geometry, mass and stiffness …

A parallel and broadband Helmholtz FMBEM model for large-scale target strength modeling

DR Wilkes, AJ Duncan, S Marburg - Journal of Theoretical and …, 2020 - World Scientific
The Fast Multipole Boundary Element Method (FMBEM) reduces the O (N 2) computational
and memory complexity of the conventional BEM discretized with N boundary unknowns, to …

Non-negative intensity for a heavy fluid-loaded stiffened plate

D Martins, M Karimi, L Maxit, R Kirby - Journal of Sound and Vibration, 2023 - Elsevier
Localisation of sound sources on vibrating structures is a critical part of the design in many
engineering applications. In structures with stiffeners, so-called Bloch–Floquet waves are …

[PDF][PDF] Efficient analysis of energy-based surface contributions for an entire acoustic cavity

C Gurbuz, S Marburg - Journal of Theoretical and Computational …, 2023 - researchgate.net
Sound radiation from vibrating structures is a crucial concern in the vehicle design process.
One effective tool to recover vibration patterns on surfaces is the surface contribution …

Non-negative intensity for planar structures under stochastic excitation

M Karimi, L Maxit, V Meyer, S Marburg… - Journal of Sound and …, 2020 - Elsevier
Identification of regions on a vibrating structure which radiate energy to the far field is critical
in many areas of engineering. Non-negative intensity is a means to visualize contributions of …