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Are you familiar with block diagrams? you should have a block with the inertia 1/m. The output of that block is acceleration. Integrate that signal and you obtain velocity. Integrate again to obtain position x (being it zero at resting position for instance) The input of the inertia block should...

i'm not sure what you really want, but is it the "Mate" feature?

yes, that's what I thought.

Can you be a bit more specific ? What's the advantage of using the strain energy, instead of the stress?

Thank's rb1957. But let's say the cross section is the same for all beams. If they all change equally, doesn't the distribution of loads remain the same? That's what's bugging me

If I have the analytical expression for the von mises stress, having cross section dimensions as variables, I can formulate an optmization problem to minimize the mass (or cross section area), where as a constraint, the von mises stress (for a given loading case) has to be lower then what the...

Thank's for the insight bkal. I was looking at mechanics of material formulas and wondering if for instance by reducing the section, the stress wouldn't increase in the same proportion, thus the effort being the same.

Hello everyone, I'm optimizing the cross section dimensions of a space frame structure, using analytical stress equations to get my constraint function and finite element analysis to compute the beam efforts (axial and shear forces, bending and torsional moments) for a given initial design...