
Accession Number : AD0729700
Title : Transverse Vibration of Nonuniform, Internally Damped Cantilever Beams.
Descriptive Note : Technical memo.,
Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK ORDNANCE RESEARCH LAB
Personal Author(s) : Kerlin,R. L.
Report Date : 11 MAY 1971
Pagination or Media Count : 33
Abstract : The BernoulliEuler theory of transverse beam vibration, suitably extended to take into account internal damping, is used to derive general expressions in closedform for the drivingpoint impedance and force transmissibility of each of three types of nonuniform cantilever beam: a truncated beam of rectangular section with constant breadth and a depth of increasing or decreasing linear taper, a truncated beam of rectangular section with a depth of increasing or decreasing linear taper and a breadth appropriately varied (hyperbolically) to maintain constant crosssectional area, and a beam composed of three stages, each of which is uniform but varies arbitrarily from the others in cross section and length. In each case, the beam is driven at its free end by a sinusoidally varying point force, and the frequency dependence of its impedance and transmissibility has been calculated. Representative results are presented for beams having the same length and mass and are compared with the response of an equally long and massive uniform beam. (Author)
Descriptors : (*CANTILEVER BEAMS, VIBRATION), (*SHIP STRUCTURAL COMPONENTS, CANTILEVER BEAMS), MODULUS OF ELASTICITY, DAMPING, RESONANT FREQUENCY, PARTIAL DIFFERENTIAL EQUATIONS, NUMERICAL ANALYSIS
Subject Categories : Marine Engineering
Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE