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Cross-sectional Deformations of Monocoque Beams and Their Side Effects on the Natural Vibration Frequencies

出版	National Aeronautics and Space Administration, 1961
URL	http://books.google.com.hk/books?id=iMBAS2tI50IC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN

註釋The variational principle, differential equations, and boundary conditions governing the cross-sectional distortions due to inertia loading of a two-dimensional model of a thin monocoque wing are shown. A theoretical analysis of this simplified model is made in order to determine the nature of the coupling between the cross-sectional modes and the spanwise deformation modes. General solutions are obtained in finite-difference form for arbitrary cross sections and an exact solution is presented for a parabolic-arc cross section of constant cover thickness. The application of these results in evaluating the coupled frequencies of the actual structure is discussed. Frequencies evaluated for a parabolic-arc monocoque beam show good agreement with experimental values.