COSMOS Beam element
COSMOS Beam element
(OP)
I am trying to analyze a beam element tube frame vehicle chassis model in COSMOS using the beam element analysis. I am running into issues with Cosmos telling me that "PCG Iterative solver stopped. Status Code 2: Preconditioner_fails_to_factor. May not have sufficient restraints. No results saved"
I have been trying to test the frame using multiple methods. The test work when I assign all tubes as beams (not trusses) with fixed ends. Once I attempt to input my suspension components as either trusses or beams with pins at either end this message appears.
I know I have sufficiently constrained the model as I have added 4 fixed points to the rear of the chassis, and applied my torsion loads to the front hubs.
What is causing this issue and how can I solve it?
Thank You
I have been trying to test the frame using multiple methods. The test work when I assign all tubes as beams (not trusses) with fixed ends. Once I attempt to input my suspension components as either trusses or beams with pins at either end this message appears.
I know I have sufficiently constrained the model as I have added 4 fixed points to the rear of the chassis, and applied my torsion loads to the front hubs.
What is causing this issue and how can I solve it?
Thank You






RE: COSMOS Beam element
If problem still occurs, Check the .OUT file and see which NODE or ELEMENT is problematic.
RE: COSMOS Beam element
I tried to use a soft spring to stabilize the model and inertial relief and I get a solution, but a very unrealistic one. It also pops up with a large displacement warning. I will see if perhaps adding the steering tie rod will help stabilize the system. Any other ideas?
RE: COSMOS Beam element
Here are some pictures of what my current setup is: