Matrix solver exception: could not apply displacements because the mesh would become invalid

- June 17, 2019 at 8:58 am
  
  piotrkurgan
  Subscriber
  
  Hello,
  
  I try to perform a EM-thermal-stess analysis in Workbench 19v2 of a simple microstrip line section and use the displacement data from Ansys Mechanical to simulate the altered behavior of my microwave element. The maximum displacement I get from the structural analysis is 25 um. However, feeding this data to HFSS results in invalid mesh error, as follows:
  
  "Solving adaptive frequency …, proces hf3d error: Matrix solver exception: Could not apply all displacements because the mesh would become invalid".
  
  Any suggestions how to cope with this problem? My EM setup is: 0.005 max delta S, max 15 passes with basis function of zeroth order.
- July 2, 2019 at 6:01 am
  
  piotrkurgan
  Subscriber
  
  Additional information that might be useful in figuring out the source of the problem is that the EM analysis fails only when structural deformations are enabled for all elements of the structure (both gnd and strip copper as well as the substrate). This problem ceases to exist when only copper elements are subjected to deformations. Any suggestions how to run the simulation including substrate deformations?

Viewing 1 reply thread

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