Roll over analysis simple bus
Hello. I'm carrying out roll over analysis on simple bus as shown in attached image. I've assigned imposed velocity along axis and not get rotation on tilt table. Ff you can help me in achieving a tilt please provide some steps to follow.
<?xml version="1.0" encoding="UTF-8"?>
Answers
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Hi,
here is the Procedure to apply Initial_velocity around an axis
9- Procedure to apply Initial_velocity around an axis - Altair University
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.
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This is my model. Can you tell me anything wrong with my model
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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 instead1 -
Oke thank you very much. I will try to follow your steps
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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?0 -
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 INPUTThe material table is not referenced properly.
Leave your email and I will contact you.
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hello this is my email:
ewsaputro@student.undip.ac.id0 -
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.
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Hi,
check the units used for added masses. Their magnitudes are consistent with kg, not with tonnes which are units used for material laws. Therefore the weight of the added masses is 1000x too high.0 -
Hi,
I am doing a similar kind of rollover analysis, but I couldnt find where I have made a mistake. There are no errors shown in the solver, still I have a problem making the bus frame crash into the platform. Can you help me with the analysis. I have attached the link for the .hm file. Thanks in advance.
https://drive.google.com/file/d/1CKshIkwsQ600ICGHtZjHYKohSIB6WlC5/view?usp=sharing
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