Relative Displacements

[Statiker57]

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?

 

[rb1957]

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 ?

 

[SWComposites]

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.

 

[B767]

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?

 

[rb1957]

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 ?