# Slow to converge, or failing?

**URL:** <https://prepomax.discourse.group/t/slow-to-converge-or-failing/2047>\
**Category:** General Questions\
**Created:** [October 1, 2024, 12:57pm UTC](https://prepomax.discourse.group/t/slow-to-converge-or-failing/2047 "2024-10-01T12:57:59Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\
**Post date:** [October 1, 2024, 1:02pm UTC](https://prepomax.discourse.group/t/slow-to-converge-or-failing/2047/2 "2024-10-01T13:02:34Z")

</div>

Based on the convergence criteria: [Stacked flow plates - model simplification - #26 by FEAnalyst](https://prepomax.discourse.group/t/stacked-flow-plates-model-simplification/1959/26)

But this case looks like a typical underconstrained model (initial rigid body motions). So I would just check the BCs, constraints and interactions as well as other connections (frequency analysis can be helpful) right away.

---

_[View the full topic](https://prepomax.discourse.group/t/slow-to-converge-or-failing/2047)._