End-Release in 1D beam element analysis
I am trying to perform a 1D beam element analysis on a FSAE car. I need help regarding the application of beam end releases at the suspension nodes, but at this point I don't know is whether I am doing this right
Node 1 i.e. pin a = 456, node 2 i.e. pin b =0 - for simulating the a arm with a ball joint
and,
Node 1 i.e. pin a = 5, node 2 i.e. pin b = 5 - for simulating the bell crank.
Thank you.
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Hello Christian,
So after running the analysis, my max displacement(v) Mag is 1.648E+02 which I think is a little too much, I know there is something wrong in my setup but I cant figure it out, I am new to HyperWorks if its not too much to ask is there a way I can share the file to you so that you can inspect?
Thank you.
Altair EmployeeSure, send it to the email in my bio and I can take a look.
Sure, send it to the email in my bio and I can take a look.
I just emailed you the file please check.
Thank you.
Altair EmployeeHave a look at the normal modes of the model and you'll see some of the members are a little less connected than you'd like in a chassis 
Other than that, the model looks reasonable to me.
Have a look at the normal modes of the model and you'll see some of the members are a little less connected than you'd like in a chassis
one last thing, and this might be a silly doubt but the max displacement (v) mag= 1.648E+02 is it read as 164.8mm?
Altair Employeeone last thing, and this might be a silly doubt but the max displacement (v) mag= 1.648E+02 is it read as 164.8mm?
Yes this is correct. It's worth also mentioning that OptiStruct is a unitless solver. I saw you used a DTI_units card, but this only for reference with OptiStruct. A consistent unit system must be used. If your length units are mm and force are newtons then your mass unit will be tons.
Yes this is correct. It's worth also mentioning that OptiStruct is a unitless solver. I saw you used a DTI_units card, but this only for reference with OptiStruct. A consistent unit system must be used. If your length units are mm and force are newtons then your mass unit will be tons.
I truly appreciate all the insight you have provided till now.
Thank you,
-Gurtej Singh
Chassis Team
UTA Racing
Hi Gurtej, your degrees of freedom are reasonable for a ball joint and bell crank. The two things I would recommend are to:
1) Release degrees of freedom where the a arm meets the upright. This should match whatever mechanism you use.
2) Ensure the coordinate system is correctly defined for the beam. When using the bar panel, the 'orientation in basic' section is defining the 'Y' Axis. If you're releasing dof 5, this is the axis it will be released on.
Hope this helps!