FIELD: plastic metal working, welding, possibly plastic working of sheet materials by gasostatic molding in mode of superplastic yielding of material. SUBSTANCE: blank includes placed between two boards filler in the form of two sheets mutually joined by intermittent welded seams and passing along perimeter sealed welded seam. Inlet for supplying gas to cavity formed by filler sheets is connected with filler. Additional gas inlet is provided for supplying gas to cavity formed by board sheets and filler. Sealing welded seam joints boards and filler along perimeter. Surface area of cells formed by intermittent welded seam on sheets of filler from periphery towards center of panel changes inversely relative to law defining surface of formed panel structure. EFFECT: enhanced operational reliability of panel structure. 2 cl, 3 dwg
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