We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.
Structural Dynamics

Structural Dynamics

  1. All Categories
  2. Structures - Structural Dynamics
  3. How to capture the shear viscosity effect in modal analysis?

How to capture the shear viscosity effect in modal analysis?

Tagged: 19.1, acoustics, damping, mechanical, Modal/Harmonic Response, structural-dynamics, structural-mechanics, Viscocity
    • January 25, 2023 at 7:34 am
      FAQFAQ
      Participant

      The viscosity for acoustic fluid elements 30/220/221 is a bulk viscosity term, not a shear viscosity term. Set up a modal (FLUID30) and harmonic analysis (FLUID80). The excitation for the FLUID80 model could be base excitation for the cantilever beam (for example). Then, check the results (e.g., response at tip) to see if all of the modes of interest can be captured. Once this is done, one can add damping (MP,VISC) in the FLUID80 model to see how the frequencies change with viscosity.

Featured Articles

Introducing Ansys Electronics Desktop on Ansys Cloud

The Watch & Learn video article provides an overview of cloud computing from Electronics Desktop and details the product licenses and subscriptions to ANSYS Cloud Service that are...

How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)

This video article demonstrates how to create a reflector for a center high-mounted stop lamp. Optical Part design in Ansys SPEOS enables the design and validation of multiple...

Introducing the GEKO Turbulence Model in Ansys Fluent

The GEKO (GEneralized K-Omega) turbulence model offers a flexible, robust, general-purpose approach to RANS turbulence modeling. Introducing 2 videos: Part 1 provides background information on the model and a...

Postprocessing on Ansys EnSight

This video demonstrates exporting data from Fluent in EnSight Case Gold format, and it reviews the basic postprocessing capabilities of EnSight.

© 2025 Copyright ANSYS, Inc. All rights reserved.