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Vibration Analysis of Rectangular Perforated Plates by COMSOL Multiphysics® Software

B. Raghavendra[1]
[1]SRM University & BITS Pilani University, Chennai, Tamil Nadu, India

Vibration analysis of perforated plates is extremely important when designing structures where resonance is the possible mode of failure. This paper ...

Bloch Waves in an Infinite, Periodically-perforated Sheet

W. Maysenhölder[1]
[1]Fraunhofer Institute for Building Physics, Stuttgart, Germany

Bloch waves in infinite periodic structures – much in vogue in the present metamaterial age – can be conveniently studied by COMSOL Multiphysics® ...

An Acoustical Finite Element Model of Perforated Elements

P. Bonfiglio[1][2] and F. Pompoli[1][2]
[1]Materiacustica S.r.l., Ferrara, Italy
[2]Engineering Department, University of Ferrara, Ferrara, Italy

The present work deals with a numerical investigation of resonating systems used for noise control applications. In literature one can find analytical ...

Simulation of Acoustical Transfer Paths for Active Noise Control

L. Fromme [1], J. Waßmuth [1], D. Wehmeier [1],
[1] Bielefeld University of Applied Sciences, Bielefeld, Germany

The knowledge of the acoustical transfer paths in active noise control systems is very important for the performance of the system. Unfortunately, ...

基于超大规模并行计算的多尺度模型声振特性仿真与预报

郁殿龙 [1], 温激鸿 [1], 尹剑飞 [1],
[1] 国防科学技术大学,长沙,湖南,中国

汽车、飞行器、舰船、高速列车等工程装备中,振动和噪声问题会严重影响装备可靠性、安全性、使用寿命和人员的健康。因此,减振降噪需求迫切,相关技术和研究也得到了前所未有的重视。 国防科技大学振动与噪声控制研究团队从2003年开始,致力于基于人工周期结构理论的弹性波传播特性、调控机理及其应用探索研究 ...

Compression Driver Simulation Including Air Damping in Phase Plug

R.Christensen, and U. Skov
iCapture ApS
Gadstrup, Denmark

A compression driver is a certain type of electrodynamic loudspeaker which has a phase plug with slits in front of the diaphragm. The slits are narrow ...

Influence of Thermal Conductivity and Plasma Pressure on Temperature Distribution and Acoustical Eigenfrequencies of High-Intensity Discharge Lamps

J. Schwieger[1], B. Baumann[1], M. Wolff[1], F. Manders[2], J. Suijker[2]
[1]Heinrich-Blasius-Institute of Physical Technologies, Hamburg University of Applied Sciences, Hamburg, Germany
[2]Philips Lighting, Turnhout, Belgium

High-intensity discharge (HID) lamps are energy-efficient light sources with excellent color qualities. A three-dimensional model of a low-wattage ...

Feed-forward/Feed-backward Mechanical Amplification in the Mouse Cochlea

J. Soons[1,2], C. Steele[2], S. Puria[2]
[1]Lab of Biomedical physics, University of Antwerp, Antwerp, Belgium
[2]Department of Mechanical Engineering, Stanford University, Stanford, USA

Sound vibrations are collected from the external environment by the eardrum and are guided to the basilar membrane in the cochlea. Pressure differences ...

Simulation of SAW-Driven Microparticle Acoustophoresis Using COMSOL Multiphysics® Software

N. Nama [1], R. Barnkob [2], C. J. Kähler [2], T. J. Huang [1], F. Costanzo [1]
[1] Department of Engineering Science and Mechanics, Pennsylvania State University, PA, USA
[2] Institute of Fluid Mechanics and Aerodynamics, Bundeswehr University Munich, Neubiberg, Germany

Introduction - The ability to precisely manipulate fluid and particles at microscales is one of the essential requirements for various lab-on-a-chip ...

Sound Propagation through Circular Ducts with Spiral Element Inside

W. Lapka
Poznan University of Technology, Poland

This paper examines a sound propagation without airflow through circular ducts with spiral element inside. Models are numerically computed in three ...