You can do this in DesignModeler. Creating a surface model is required to reduce the solution time in transient structural. Show the model tree in DesignModeler. Where did the wing profile come from? Was it a collection of points that a curve was drawn through? Extrude that curve and there is your first surface. Create a surface at the center of each rib, there is your ribs. You just need to start over on the geometry.