PARAMETRIC STUDY OF NATURAL FREQUENCIES OF SKIN-STRINGER STRUCTURE.
DAYTON UNIV OHIO RESEARCH INST
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The results of a parametric study of the natural frequencies of a row of skin-stringer structures are contained in this report. Typical aircraft structures with hat-section, Z-section, or milled stringers were considered. The effect on the natural frequencies of parametric variation of stringer spacing, distance between frames, thickness of the covering skin, and material properties of the structure are tabulated. These results were obtained from a delta-matrix procedure which is developed from a transfer matrix analysis of the skin-stringer structure. Improvements in the transfer matrix analysis of the structure are also developed. Author