Modal analysis on static structural results: deformed + prestressed

- December 16, 2019 at 10:55 am
  
  StefvanH
  Subscriber
  
  Dear all,
  
  I am studying a flexure joint and I am interested in the Eigen frequencies when the mechanism is deformed a certain degree.
  
  To do this, first I conduct a static structural analysis with large-deflection on. This deforms the mechanism and calculates stresses.
  
  Next I perform a modal analysis on the results from the static structural. In the results from the modal analysis, the flexure joint seems undeflected... Results do change if I change the amount of flexure joint deformation in the static structural analysis, so I am confident that the modal analysis takes the right results (both deformed geometry and prestressed material).
  
  Does anyone know how to visualize the mode shapes on the deformed geometry? Currently the mode shapes (undeflected flexure) do not correspond with the frequencies (deformed flexure).
  
  Thanks
  
  Stef
  
  Ps. Attached you find how I coupled the modal analysis to the static structural.
- June 13, 2020 at 3:04 pm
  
  omerfrkunl
  Subscriber
  
  Hi StefvanH
  
  Please look at the link: https://www.simutechgroup.com/tips-and-tricks/fea-articles/160-fea-tips-tricks-ansys-14-pre-stressed-modal-analysis-nonlinear-static-analysis
- December 28, 2022 at 10:44 am
  
  bhagwantP
  Ansys Employee
  
  Hello StefvanH,
  Found one more add on link for your reference:
  https://www.youtube.com/watch?v=AYSACqgFMFo
  Thanks

Viewing 2 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

Boost Ansys Fluent Simulations with AWS

Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series

The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog

Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.

Trending discussions