The setup process is same for every inertia relief analysis despite changes in geometry. Just follow the steps in this video to perform inertia relief on BAJA rollcage.
I have a question, why no constraint(load collector) is applied? Theoretically without constraint the value of global stiffness matrix will be zero and no solution will exist.
Hi Shashwat, in an inertia relief analysis, the response of the geometry is tested against internal resisting forces caused by inertia. So SPC constraints are not required. However, the solve does create 'Support' type of constraints at the backend. It is also possible to create support constraints manually, but the method to do that is not shown in this video. So essentially, due to these supports, the global stiffness matrix does not become zero. I hope this answers your question!
Yes, you will get the results in that case. However, as all nodes on the struture are moving with same magnitude, the displacement results might be negligible. Furthermore, I do not think the whole struture will be acted upon by a uniform g load in any real life scenario! There will always be a variation in loads applied at different locations on the structure.
@@Aeroswap thanks for reply.. But I didn't quite get your comment about uniform g.. In reality aren't we acted upon a uniform g load as long as we are at the same peripheral line on the earth
Right, we are acted upon by uniform g. But what I am trying to say is that without an unbalance of forces, there cannot be a deformation. Consider a beam element with the same magnitude and direction force applied at both ends. The beam will translate as a whole rather than deflecting. Similarly, constant g will translate the body and there will not be any deformation. I hope you get my point here!