Hi,
As a starter project (SW2010), I am trying to make a crude simulation of a Go Kart rear axle flex when using a combination of 3 bearing supports (see pic below).
For that matter I use the "bearing" fixtures and apply a force at the extremities of my axle
Should be quite simple, yet I keep getting the " model is unstable..." error when using "direct sparse" solver or "status code 9 : matrix singular.." when using the "FFEplus"solver
I must be missing something very obvious. Could someone shade a light on this or suggest a relevent reference document/video tutorial for axle/bearing simulationst?
Thanks in advance for your help,
Your model is underconstrained. Particularly in axial translation and rotation. Think about the real life problem - you have at least one constraint in the axial direction with a shaft clamp, circlip, or something and you have rotational constraint with either the brake applied or the torque to the drive sprocket. Add in the additional constraints and it should solve fine. Be sure to check your solution with some simple beam calculations.