Acoustic impedance of micro perforated membranes: Velocity continuity condition at the perforation boundary

C Li, B Cazzolato, A Zander - The Journal of the Acoustical Society of …, 2016 - pubs.aip.org
The classic analytical model for the sound absorption of micro perforated materials is well
developed and is based on a boundary condition where the velocity of the material is …

An investigation on the acoustic impedance of a viscously damped micro-perforated rectangular membrane

Y Zhang, M Shrestha, S Chen, YW Chin, GK Lau, K Liu… - Applied Acoustics, 2023 - Elsevier
A theoretical method base on the zero-slip boundary and a finite element model with
thermoviscous membrane-acoustic interaction are proposed for investigating a viscously …

[HTML][HTML] Free vibration of perforated cylindrical shells of revolution: Asymptotics and effective material parameters

S Giani, H Hakula - Computer Methods in Applied Mechanics and …, 2023 - Elsevier
Free vibration characteristics of thin perforated shells of revolution vary depending not only
on the dimensionless thickness of the shell but also on the perforation structure. For any …

Computational analysis of the nonlinear vibrational behavior of perforated plates with initial imperfection using NURBS-based isogeometric approach

A VeisiAra, H Mohammad-Sedighi… - … of Computational Design …, 2021 - academic.oup.com
In this article, an isogeometric analysis through NURBS basis functions is presented to study
the nonlinear vibrational behavior of perforated plates with initial imperfection. In this regard …

Structural-acoustic design of a multi-functional sandwich panel in an automotive context

CJ Cameron, P Wennhage… - Journal of …, 2010 - journals.sagepub.com
This article deals with the design and weight optimization of a multi-functional vehicle body
panel in an automotive context. An existing vehicle design has provided functional design …

Bending vibration of perforated beams in contact with a liquid

KH Jeong, M Amabili - Journal of sound and vibration, 2006 - Elsevier
A theoretical study on the natural frequencies and the mode shapes of perforated beams in
contact with an ideal liquid is presented. In the theory part, it is assumed that the beams are …

Frequency response analysis of perforated shells with uncertain materials and damage

H Hakula, M Laaksonen - Applied Sciences, 2019 - mdpi.com
In this paper, we give an overview of the issues one must consider when designing methods
for vibration based health monitoring systems for perforated thin shells especially in relation …

[HTML][HTML] On high-order finite element solution of eigenvalue problems on isospectral surfaces

H Hakula - Computers & Mathematics with Applications, 2024 - Elsevier
Isospectral surfaces provide a rich family of benchmark problems. In this paper the efficacy
of a hp-finite element method in such Laplace-Beltrami eigenvalue problems has been …

[HTML][HTML] On effects of perforated domains on parameter-dependent free vibration

S Giani, H Hakula - Journal of Computational and Applied Mathematics, 2021 - Elsevier
Free vibration characteristics of thin perforated shells of revolution vary depending not only
on the dimensionless thickness of the shell but also on the perforation structure. All holes …

On Long-Range Characteristic Length Scales of Shell Structures

H Hakula - Eng, 2023 - mdpi.com
Shell structures have a rich family of boundary layers including internal layers. Each layer
has its own characteristic length scale, which depends on the thickness of the shell. Some of …