December 7, 2021 11:00 a.m.–4:00 p.m. EST

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COMSOL Day: Structures & Vibrations

Computational methods for simulating structural mechanics have a rich history. Everything from material models and constitutive relations to specialized elements and solvers have been studied and developed for decades. As one of the first general-purpose physics platforms, COMSOL Multiphysics® incorporates structural mechanics into the broader context of multiphysics through the Structural Mechanics and Acoustics modules and associated add-on products.

This COMSOL Day will focus on structures and vibrations. Both current users and those new to COMSOL Multiphysics® will gain insight into these applications by attending technical presentations and software demonstrations by COMSOL developers and application engineers. Attendees will also have the opportunity to ask questions and get feedback from COMSOL staff throughout the day. Join us!

Schedule

10:30 a.m.

Please join us before the first presentation starts to settle in and make sure that your audio and visual capabilities are working.

11:00 a.m.
Welcoming Remarks
11:15 a.m.

COMSOL Multiphysics® version 6.0 includes several important updates pertaining to structures and vibrations. These features are primarily contained in our Structural Mechanics, MEMS, and Acoustics modules. This session will provide an overview of these features within the broader COMSOL Multiphysics® platform. Here are some highlights:

  • Magnetomechanics multiphysics interface
  • Nonlocal plasticity
  • Reduced integration
  • Crack closure
  • And more!
11:45 a.m.
Q&A/Break
12:00 p.m.
Parallel Sessions
Rotordynamics & Bearings

The vibration characteristics of machinery with rotating parts differs significantly from the characteristics of a nonrotating system. The dynamic properties of rotating components depend on their spin speed as an effect of frame acceleration. Rotordynamics simulations provide an efficient way of accounting for these effects and for designing efficient and reliable equipment. In this presentation, we will talk about how to set up different analysis types for rotordynamics simulations in COMSOL Multiphysics®. Bearing simulations will be covered, as well as analysis of systems containing rotors, bearings, and housing.

Layered Composite Modeling

In this session, we will demonstrate how to model layered composite structures. Common examples of composite materials include fiber-reinforced plastic, laminated plates, and sandwich panels — all of which are widely used in the manufacturing of aircraft and spacecraft components, wind turbine blades, and other structures. We will cover two approaches to accurately model composite shells: layerwise theory and equivalent single layer theory. In addition to standard structural analyses, the presentation will go over micromechanical, first-ply failure, delamination, damage, and linear buckling analyses. We will also show how to include other physical phenomena in a composite laminate model, such as heat transfer, electromagnetics, acoustics, and fluid flow as well as various nonlinear materials models, such as hyperelasticity, plasticity, and piezoelectricity.

12:30 p.m.
Q&A/Break
12:45 p.m.
Parallel Sessions
Elastic Wave Propagation in Solids

Elastic wave propagation is a common part of a wide range of problems, from seismic waves caused by earthquakes to ultrasonic nondestructive testing of solids. In this session, we will talk about the time-domain modeling of waves propagating through coupled elastic-acoustic media using the time-explicit nodal discontinuous Galerkin method (dG-FEM). We will discuss the distinctive features of the method with respect to discretization, mesh, and solvers. You will get an overview of the physics interfaces based on dG-FEM and learn where and how they can be efficiently used.

Advanced Topics in Structural Dynamics

COMSOL provides several advanced features for modeling structural dynamics. In this session, you will get an overview of some of these features. The first topic will be the new framework for component mode synthesis (CMS). With CMS, linear components can be reduced to low-order models. Such reduced components are computationally very efficient and can be used together with linear or nonlinear FE models in both static and dynamic analyses. You will also see how to perform a random vibration analysis, together with the new functionality for fatigue evaluation of such results. Both the CMS and the random vibration functionalities are based on the general reduced order model framework, which also will be described.

1:15 p.m.
Q&A/Break
1:30 p.m.
Introduction to COMSOL Multiphysics®

Learn the fundamental workflow of COMSOL Multiphysics®. This introductory demonstration will show you all of the key modeling steps, including geometry creation, setting up physics, meshing, solving, and postprocessing.

Break
2:00 p.m.
Welcome Back: Some Useful Resources
2:05 p.m.
Parallel Sessions
CAD & Meshing

In this session, we will discuss strategies for preparing CAD designs for simulation with COMSOL Multiphysics®. Defeaturing and simplifying the geometry and carefully designing the mesh allows you to focus on the important features for the physics while keeping the solution time and memory requirements within reasonable limits. We will present and demonstrate functionality for finding and deleting small geometric entities, finding and resolving gaps and overlaps between objects, fine-tuning the mesh element size, and generating structured meshes.

Acoustic-Structure Interaction

Learn about the Acoustics Module and how you can use it to solve vibroacoustics problems involving sound radiation from vibrating structures to the surrounding fluids. Moreover, you can also simulate the complementary effect of the acoustic load on structure movements. In this session, we will present different numerical schemes available for modeling acoustic–structure interactions at small and large scales. Use cases include nondestructive testing, speakers, microphones, and sonar.

2:35 p.m.
Q&A/Break
2:50 p.m.
Parallel Sessions
Fluid–Structure Interaction

This session will provide an overview of various features available for fluid–structure interaction (FSI) in COMSOL Multiphysics®. We will demonstrate model examples with one-way coupling as well as two-way coupling for steady-state and time-dependent FSI simulations. In addition, we will cover other related capabilities such as handling of moving meshes, combining FSI simulations with heat transfer, two-phase flow, and more.

Piezoelectric Materials & Transducers

A transducer is an electronic device that converts energy from one form to another. In this session, we will learn the basics of modeling piezoelectric materials in COMSOL Multiphysics® and how they can be used to model piezoelectric transducers. These devices are useful for applications requiring the generation of sound in air and liquids. Examples of such applications include phased array microphones, ultrasound equipment, inkjet droplet actuators, drug discovery, sonar transducers, bioimaging, and acousto-biotherapeutics. We will also discuss how to include magneto-mechanical coupling for modeling magnetostrictive transducers in COMSOL Multiphysics®, which is widely adapted for applications in sonar, acoustic devices, active vibration control, position control, and fuel injection systems.

3:35 p.m.
Closing Remarks

COMSOL Speakers

David Kan
Vice President of Sales
David Kan is COMSOL's vice president of sales for the southwestern region of the US. He set up the Los Angeles branch office of COMSOL in 2001 and received a PhD in applied mathematics from UCLA in 1999.
Lauren Sansone
Marketing and Events Director
Lauren Sansone is the marketing and events director at COMSOL, Inc. and has been with COMSOL since 2006. She is responsible for the global event marketing of COMSOL Days, the COMSOL Conference, exhibitions, and training.
Henrik Sönnerlind
Technology Director, Structural Mechanics
Henrik Sönnerlind has managed structural mechanics development at COMSOL since 2010. With a background as a consultant, he has many years of experience in engineering analysis for the automotive, nuclear, and telecom industries. He graduated from KTH in Stockholm in 1981, specializing in continuum mechanics and numerical methods.
Kirill Shaposhnikov
Senior Developer, Acoustics
Kirill Shaposhnikov works at COMSOL as a development engineer in the acoustics group. He has a degree in applied mathematics from South-Russian State Polytechnic University and a PhD in mechanical engineering from the Vienna University of Technology. His interests focus on applied mathematics, mathematical physics, and numerical analysis.
Lorant Olasz
Technology Director, External Interfaces
Lorant Olasz joined COMSOL in 2006 and is the technical product manager for the CAD Import and ECAD Import modules, LiveLink™ for CAD products, and LiveLink development team. Previously, he was a product specialist in structural mechanics. He received his PhD in solid mechanics from the Royal Institute of Technology, Stockholm.
Prashant Srivastava
Technical Product Manager, Rotordynamics
Prashant Srivastava joined COMSOL in 2012, and currently works as a product developer within the structural mechanics group. He has also contributed to the development of the Multibody Dynamics Module. He received his PhD in aerospace engineering from the Indian Institute of Science, Bangalore, where he investigated the mechanical behavior of polymeric materials using molecular dynamics simulation.
Pawan Soami
Technical Product Manager
Pawan Soami is the product manager for the Composite Materials Module and Multibody Dynamics Module. He has been working at COMSOL in the Bangalore office since 2010. He received his master's degree in aerospace engineering at the Indian Institute of Science, where he worked on spectral methods for wave propagation in structures.
Jinlan Huang
Lead Applications Engineer
Jinlan Huang is an applications engineer for vibrations and acoustics and instructs acoustics training courses. She received her PhD from Boston University, Department of Aerospace and Mechanical Engineering, investigating acoustic wave propagation in complex-tissue environments and ultrasound-induced tissue heating and bleeding control. She joined COMSOL in 2011.
Andy Cai
Senior Applications Engineer
Andy Cai joined COMSOL in 2015. Previously, he received his PhD in geophysics from Yale in 2014 and spent a year at the University of Maryland, College Park for postdoctoral work.
Mranal Jain
Senior Applications Engineer
Mranal Jain has been with COMSOL since 2013 and currently leads the applications team in the Los Altos, CA office. He studied microfluidics and electrokinetic transport, while pursuing his PhD in chemical engineering at the University of Alberta, Edmonton.
Alex Guo
Senior Applications Engineer
Alex Guo received his PhD in mechanical engineering from Duke University, working on thin film flow models, electrohydrodynamics, and phase change heat transfer. He joined COMSOL in 2020 as an applications engineer specializing in CFD and transport phenomena.

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COMSOL Day Details

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December 7, 2021 | 11:00 a.m. EST (UTC-05:00)
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