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Effect of using Inertia Relief analysis

Hi! I am working on the optimization of a structural steel connection (maximizing stiffness). I used the inertia relief analysis to avoid placing a support that affects the optimization results. I know that by using the inertia relief analysis, the sum of the total applied forces on the structure is zero, since the applied forces are balanced by inertia forces.
Kindly, I would like ask the following:
Since the inertia forces are balancing the applied forces, there is no changes in applying different magnitudes on the connection? In other words, by using the inertia relief analysis, the optimized shape is independent on the applied forces?
I appreciate any clarification about this issue.

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Adriano_Koga

Inertia relief will apply a correcting acceleration to "cancel" the rigid body movement.

The optimized shape will depend on the applied forces, even with inertia relief.

Serge Mrad

Inertia relief will apply a correcting acceleration to "cancel" the rigid body movement.

The optimized shape will depend on the applied forces, even with inertia relief.

Thank you for your reply.
Do you think applying an inertia relief analysis for the structural connection (attached figure) is a good solution? This is to avoid placing any support that can affect the optimization.

6a4009a4-3248-4f02-9ae8-89ddbfa889ab.jpg

Adriano_Koga

Thank you for your reply.
Do you think applying an inertia relief analysis for the structural connection (attached figure) is a good solution? This is to avoid placing any support that can affect the optimization.

sure. You can use Inerti Relief, and OptiStruct will promote equilibrium for you, to avoid rigid body movement.