You are invited to join us at COMSOL Day Montreal for a day of minicourses, talks by invited speakers, and the opportunity to exchange ideas with other simulation specialists in the COMSOL community. This event will be held in English.
View the schedule for minicourse topics and presentation details. Register for free today.
Build a sound foundation for your modeling work. This demonstration will illustrate best practices for the entire workflow in COMSOL Multiphysics® through geometry creation, setting up your physics, meshing, solving, and postprocessing the results.
Modeling of the Vibroacoustic Behavior of Hearing Protectors Using the Finite Element Method
One of the reasons why hearing protectors are not fully efficient at protecting against noisy environments is the discomfort they induce. This discomfort may incite an individual to wear his protector incorrectly or to remove it, thereby reducing its performance. Of specific interest is the auditory discomfort that depends on the acoustic pressure value at the eardrum of the protected ear. To reduce this discomfort efficiently, a tool for the acoustical design of the hearing protector device (HPD) that allows for the prediction of the frequency spectrum of the acoustic pressure in the ear canal is useful. This is a complicated issue that requires accounting for all of the sound transmission paths (e.g., airborne and structure-borne) within the head, hearing system, and HPD system. This involves solving coupled exterior and interior problems where incoming external sound waves or internally generated sound interacts with an HPD made up of various solid, poroelastic, and acoustical domains coupled to tissues with complex behavioral laws. In this presentation, we show how the finite element approach can be helpful in predicting and understanding the vibroacoustic frequency behavior of open ears and ears occluded by HPDs such as earmuffs and earplugs, with the aim of optimizing their comfort. In particular, the use of the COMSOL Multiphysics® software to solve models of various complexities is considered and discussed. Simulation results are compared with experimental data, analytical models, and other numerical softwares.
Utilisation de COMSOL Multiphysics® dans le programme de robotique d’Hydro-Québec
COMSOL Multiphysics® est l’outil privilégié dans plusieurs domaines de recherche à l’IREQ tels la corrosion, les traitements thermiques, l’immunité électromagnétique et les capteurs de mesure. La présentation portera sur les applications de COMSOL Multiphysics® dans le développement des technologies d’inspection et de systèmes robotiques conçus par l’IREQ. Deux applications récentes seront ciblées: le traitement thermique post-soudage in-situ et la mesure de la protection galvanique des conducteurs aériens. Dans ces deux exemples, COMSOL Multiphysics® est l’outil permettant de développer l’application et d’en comprendre les variables et leur inter dépendances afin de concevoir des algorithmes embarqués sur des systèmes robotisés.
Use of COMSOL Multiphysics® in Hydro-Québec's Robotics Program
COMSOL Multiphysics® is the preferred tool in several research areas at IREQ, such as corrosion, heat treatments, electromagnetic immunity, and measurement sensors. The presentation will focus on the applications of COMSOL Multiphysics® in the development of inspection technologies and robotic systems designed at IREQ. Two recent applications will be presented: in situ postwelding heat treatment and measurement of the galvanic protection of overhead conductors. In these two examples, COMSOL Multiphysics® is the reference tool used to develop the application and to understand the variables and their interdependencies in order to design algorithms embedded in robotic systems.
Learn how to convert a model into a custom app using the Application Builder, which is included in the COMSOL Multiphysics® software. You can upload your apps to a COMSOL Server™ installation to access and run the apps from anywhere within your organization.
Get a quick overview of using the CFD Module and Heat Transfer Module within the COMSOL® software environment.
Explore the capabilities of COMSOL Multiphysics® for electromagnetics in the static and low-frequency regime with a focus on the AC/DC Module.
Learn about the meshing techniques that are available to you in the COMSOL Multiphysics® software. We will introduce you to basic meshing concepts, such as how to tweak the meshing parameters for unstructured meshes. More advanced topics include working with swept meshes and creating mesh plots.
Learn about modeling high-frequency electromagnetic waves using the RF Module, Wave Optics Module, and Ray Optics Module.
Learn the fundamental numerical techniques and underlying algorithms related to linear and nonlinear multiphysics simulations. We will cover the difference between iterative and direct solvers as well as the different study types including stationary, transient, and eigenfrequency analysis.
Get an introduction to the capabilities of the COMSOL Multiphysics® software for modeling the interactions between acoustic waves and structural vibrations, including some tips and tricks for improving both model accuracy and runtime, and learn about advanced postprocessing for acoustic waves.
Institut Robert Sauvé en Santé et Sécurité du Travail
Inspection and Maintenance Robotics Department, Hydro-Quebec’s IREQ