Roll over analysis simple bus

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9- Procedure to apply Initial_velocity around an axis - Altair University

Hi,

here is the Procedure to apply Initial_velocity around an axis

Also, make sure to constrain de independent node of a rigid body in all other degrees of freedom.

Share the model if the issue persists.

This is my model. Can you tell me anything wrong with my model

Hi,
-you have created rigid with the master node on a structural element- this is not allowed. Make sure you use the 'calculate node' or pick a free node (not connected to other elements) as independent node when creating rigid elements. Set Icog=3 or 4 so the master node will not be moved to CG
-check unit consistency: the material properties are in tonne, mm, s so the gravity should be 9810. Also, define appropriate units in the begin card
-gravity was acting in the wrong direction, so a negative scale factor was applied to reverse the direction
-the boundary condition on the tilted platform constrained 1236 DOF. It should constrain 12345 instead
-the contact sets between wheels and tilting platform were swapped
-advanced mass scaling AMS is used instead of DT/NODA/CST mass scaling
-the run time was extended to allow the bus to hit the ground
-the floor is not large enough: rigid wall can be used as ground instead

Oke thank you very much. I will try to follow your steps

I am stuck in rollover simulation this bus, can you help me with this?
I am attached error data from Radioss log. Can I email you privately?

Hi,

ERROR ID : 286
** ERROR IN INPUT CONSISTENCY
DESCRIPTION :
2D SOLIDS (QUAD AND TRIA) ARE NOT COMPATIBLE WITH N2D3D=0

There are QUAD elements, which are not compatible with 3D analysis. Go to 2D> ELEMTYPES> 2D & 3D and make sure types are as shown in the below image. If not change the tria3=SHELL3N and quad4=SHELL4N.

<?xml version="1.0" encoding="UTF-8"?>

ERROR ID : 126
** ERROR IN MATERIAL INPUT

The material table is not referenced properly.

Leave your email and I will contact you.

hello this is my email:
ewsaputro@student.undip.ac.id

Hi, I applied rigid body between chassis and floor. But there is something wrong between connection. I am attached the result video, can you help me to show the problem.