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Relative Displacements

Relative Displacements

Relative Displacements

I'm trying to find the displacements of the centre of an access cover relative to the fixings around it's edge. The access cover is modelled on a FEM of the full wingbox but my problem is the deflection caused by global wing bending 'swamp' the local deflections on the access panel. How can I remove these global wing bending effects so I can find the local deflections on the access panel caused by the applied air pressures, thermal and wing bending strains?

RE: Relative Displacements

I think you can set up a local coordinate system on the access cover, one that moves with the cover.

another day in paradise, or is paradise one day closer ?

RE: Relative Displacements

Um, just compare the deflection of the center of the panel to the average deflection of all of the nodes around the edge of the panel.

RE: Relative Displacements

Why you want to separate it, it is integral part of the wing, and since you have it FEM-ed you have the picture for stress and strain?

RE: Relative Displacements

i'm guessing he wants to know the deflections around the perimeter of the access panel, maybe to design the seal ?

another day in paradise, or is paradise one day closer ?

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