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Voyez comment la modélisation et la simulation sont utilisées par les industries La modélisation et la simulation multiphysiques pilotent l'innovation dans tous les grands secteurs d'activité et dans le monde universitaire — comme en témoignent les nombreuses utilisations présentées dans des articles et des posters techniques présentés par des ingénieurs, chercheurs et scientifiques à la Conférence COMSOL chaque année. Inspirez-vous des récents proceedings réunis ci-dessous, ou, pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt, utilisez la recherche rapide.

Consultez les proceedings de la Conference COMSOL 2024

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Acoustics and Vibrations

一款经典开口式音箱的仿真分析

陆晓 [1], 温周斌 [2], 徐楚林 [2], 岳磊 [1], 李陆化 [1],
[1] 浙江中科电声研发中心
[2] 浙江中科电声研发中心;中国科学院声学研究所

作为智能家居的控制中心，智能音箱融合了人工智能、语音识别、大数据和云计算等诸多先进技术。但是，音箱还是其最基本的属性，发出悦耳的声音还是智能音箱最基本也是最重要的技术指标之一。智能音箱火爆全球，它给电声产业带来千载难逢的机遇和挑战。基于COMSOL®软件仿真一款Hobby HIFI经典开口式音箱的低频声场。扬声器磁路和振动系统的等效电路模型在“电路”接口中建立，可计算出活塞辐射面上的加速度；使用“压力声学，频域”和“压力声学，边界元”接口可分析得出音箱内部和外部的声场分布，它同时考虑了箱体的结构振动和声场的耦合作用，使得声场仿真结果更加准确 ... En savoir plus

COMSOL在井下动液面声波反射特性研究中的应用

仵杰 [1], 王轲 [1],
[1] 西安石油大学光电油气测井与检测教育部重点实验室

在油气井开采过程中，地层的供液能力制约产量和综合效率的最大化。动液面不仅是反映地层供液能力的一个重要指标，而且是油田确定合理沉没度、制定合理工作制度的重要依据。本文应用COMSOL压力声学瞬态模块三维数值计算分析在不同情况下井下动液面测量中的声波反射特性。首先构建套管横截面积不变，油管横截面积由小变大或者由大变小的三维几何模型。通过分析计算数据得出：对于脉冲声源，当油管横截面积由小变小时，交界面处的反射声波与入射声波极性相同；反之，横截面积由大变小时，界面反射声波极性反向 ... En savoir plus

通过平面外的转动模控制弹性超材料板的弯曲刚度

Yun Lai [1], Jinjie Shi [2],
[1] National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, Jiangsu, People’s Republic of China
[2] College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, Jiangsu, People’s Republic of China

In this work, we investigate the resonant properties of finite-sized membrane-mass-type elastic metamaterial thin plates. We find that the effective bending stiffness of such metamaterial thin plates can be controlled independently by the out-of-plane rotational resonances, so as to vary ... En savoir plus

Acoustic Metamaterials for Low Frequency Industrial Applications

K. Bugaj [1], L. Chalmers [1], D.P. Elford [1], R.D.Wilson [1],
Sonobex Limited, The Mansion, Building Research Establishment, Watford, UK

This poster focuses on the development of practical acoustic metamaterials for the reduction of low frequency industrial noise. High noise levels generated by industrial machinery can cause major environmental problems and stakeholders are looking for novel solutions. Particular ... En savoir plus

Advanced Loudspeaker Calculator – an Example of COMSOL® Apps Utilization

F. Malbos [1], M.K. Bogdanski [2], M. Strauss [2],
[1] Harman France, VPDT, Paris, France
[2] Harman International, VPDT, Straubing,Germany

Developing a new loudspeaker design requires not only knowledge and experience in the field, but also an access to verified and efficient tools. HARMAN’s Virtual Product Development (VPD) team has developed a Comsol Application to serve at the early stages of the design process. The app, ... En savoir plus

Ultrasonic Power Delivery Through a Steel Wall - Water Interface

P. Moilanen [1], A. Salmi [1], E. Haeggström [1],
[1] Electronics Research Laboratory, Division of Materials Physics, Department of Physics, University of Helsinki, Helsinki, Finland

This simulation study analyzed ultrasonic power delivery by low-frequency (20-50 kHz) high-power ultrasonic actuation into fluid through a steel wall. The Acoustic-Piezoelectric Interaction, Frequency Domain interface of the COMSOL Acoustics Module were employed for this study. The ... En savoir plus

Multiscale and Multiphysics Modeling of an Adaptive Material for Sound Absorption

T. G. Zielinski [1], K. C. Opiela [1],
[1] Institute of Fundamental Technological Research of the Polish Academy of Sciences, Warsaw, Poland

A concept of an adaptive sound absorbing material is proposed and investigated numerically using the COMSOL Multiphysics® Software suitable for the required advanced dual-scale modelling which involves solution of various problems of physics at the microscopic and macroscopic levels. A ... En savoir plus

Structural Mechanics, Acoustics Module - Numerical Study of Loudspeaker Diaphragm Geometry

A. Mageswaran [1],
[1] DTU-Technical University of Denmark, Denmark

The study of loudspeaker diaphragm geometry is aimed to focus on how does the distribution of mass in the radial direction changes the ‘dynamic and acoustic response’ of the diaphragm. The geometry is subjected to concentrating the mass by changing the shape of our interest in a 2D ... En savoir plus

Photoacoustic Modeling Using Amplitude Mode Expansion Method in a Multi-Scale T-cell Resonator

S. El-Busaidy [1], B. Baumann [1], M. Wolff [1], L. Duggen [2],
[1] Hamburg University of Applied Sciences, Germany
[2] University of Southern Denmark, Denmark

The photoacoustic (PA) effect consisting of the generation of an acoustic signal based on the absorption of light has already demonstrated its potential for various spectroscopic applications for both gaseous and solid samples. The signal produced during photoacoustic spectroscopy (PAS) ... En savoir plus

Simulation-Led Design to Optimize Innovative Acoustic Phantom and Ice Catheter Calibration Method

E. Adawi [1],
[1] Biosense Webster, Inc., Kibbutz Shefayim, Israel

Intracardiac Echocardiography (ICE) ultrasound imaging of cardiac cavities is a known diagnostic and monitoring technique, used during interventional cardiology and electrophysiology procedures. The SOUNDSTAR® Catheter, manufactured by Biosense Webster, Inc., enables locating the ... En savoir plus

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