Learning Forum

[Hex_screw]

Hi,

I am struggling to perform the following load steps :

• A top structure is resting on a bottom structure. Between the 2 I have actuators. Bottom structure is on the ground.
• First step, loads (forces) are applied on the top structure. Both structure will deflect.
• Then, we want to crank up the actuators to level the top structure and make it flat (initial loads are still applied)

I modelized it with a translational joint, on which I apply a joint load of type displacement during step 2. Unfortunately I think I fail to understand the correct use of this function because no displacement is made during step2.

Is there a better approach, or is my model possible and why is it failing in your opinion ?

Thanks a lot for your help.

[Sahil Sura]

Hello Hex_screw,
Looking at the mentioned details, the problem can be addressed via a multistep or a single step approach as per the user criterion.
Once on ensuring the proper constraints using the joints and connections, you can drag and drop the requested joints onto the system name from the project outline to define a boundary condition for the joint.
You can opt for defining the joint boundary condition via the Tabular Data where you can activate and deactivate the joint displacement (eg. specifying it as nil), etc. for respective time or steps.

Defining other boundary conditions by the same method and ensuring your analysis settings are as required for each step would help you get the expected results.

Please refer to the following references for more details-  

Joints (ansys.com) 

Creating Kinematic Constraints Between Parts Using Ansys Mechanical — Lesson 5 - YouTube

 

Hope this helps!

Thanks,

Sahil

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