Vibration Analysis of Corrugation-Stiffened Panels Engrg. Mechanics Dept. General Motors Research Lab. Warren, MI

Format:

Conference/Event

Author/Creator:

Chen, Francis H. K., author.

Conference Name:

1978 Automotive Engineering Congress and Exposition (1978-02-27 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1978

Summary:

Automobile panels are stiffened in a variety of ways to meet engineering design criteria. Current example panels are numerous and include the roof, deck lid, hood, floor pan, et cetera If lightweight, low modulus materials (e.g., aluminum, sheet molding compound) are to be considered for automobile panels, it can be anticipated that some form of stiffening will be necessary.In this paper, one particular type of stiffened panel, a two-layer panel consisting of a trapezoidally corrugated plate and a flat plate fastened together, is examined analytically and experimentally. A technique for modeling the panel with finite elements is developed. Rather than assigning "smeared-out" properties to the stiffeners, the fidelity of the panel is retained by modeling it as a double-layer structure (instead of as a plate) so that local deformations are also allowed. Because the method of joining significantly affects the structural properties of a stiffened panel, the two common fastening methods considered -- spot-welding and epoxy-bonding, require special modeling treatment. It is shown that for a spot-welded panel, a finite element model which accounts for the effect of different spot-weld spacings can be constructed. This is achieved through the application of constraint relations between the component plates. For epoxy-bonded panels, different constraints are used.To verify these modeling procedures, both models are used in computing frequencies and mode shapes for free panel vibration, and the results are compared with experimental values. Excellent agreement was achieved with errors ranging from 2 to 8 percent for most of the modes. This investigation emphasizes the need for adequately representing the local deformations even when evaluating relatively simple built-up panels

Notes:

Vendor supplied data

Publisher Number:

780362

Access Restriction:

Restricted for use by site license