-
-
November 18, 2023 at 7:50 pm
Dan Woods
SubscriberHi,
I'm having an issue where the global acceleration from ACEL seems to be causing rigid body motion in my bridge model.
I have set gravity to -9806.5 mm/s2 and have my densities and other material properties in matching units (~0.002 - 0.008 g/mm3, E in N/mm2). The model seems to solve correctly when I apply pressure loads on the bridge deck elements but the global gravity load seems to always cause it to fail.
Am I missing something about how ACEL works? I've used DK to apply my boundary conditions. I'm not sure how the solution can solve with applied loads but not for gravity since surely any issues with my boundary conditions would apply to both cases.
Any advice appreciated thanks.
-
November 21, 2023 at 1:50 pm
Ashish Khemka
Forum ModeratorHi Dan,
If you perform a modal analysis then you will come to know if there are any unconstrained bodies.
Regards,
Ashish Khemka
-
- The topic ‘Gravity causing rigid body motion?’ is closed to new replies.

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.
- How to do the frequency response of the nonlinear vibration of a flexible PCB?
- Importing Line and Solid Bodies from SpaceClaim to Mechanical
- how to open SendCommand in Ansys
- problems facing during solution
- Still facing the same issue
- Failed to move file from solver directory to scratch directory: file.rst
- Adaptive Sizing
- Stiffness factor
- Import DAT file
- Import pressure data (coordinates and value) to ansys workbench through excel
-
8808
-
4658
-
3153
-
1680
-
1470
© 2023 Copyright ANSYS, Inc. All rights reserved.