ISSN:
1573-8582
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions Thus, in using approximative methods to calculate the forced vibrations of thin-walled T beams it must be borne in mind that: a) the maximum stresses are attained for the value of the driving frequency different from those obtained in the beam solution; b) the sign of the stresses on the beam axis in certain cross sections can be opposite to the sign of the curvature of this axis; c) for definite values of the driving frequencies the values of the reduction coefficient obtained according toexpression (4.1) can fall outside the interval [0, 1]; d) the distribution of normal stresses along the height of the T beam departs considerably from linear, where the shape of the curve varies with the driving frequency and the maximum values of the normal stresses are not always attained at the extreme longitudinal fibers of the stem; e) the essential refinement of the natural flexural-mode frequencies of the “beams” by the inclusion of transverse shear strain and rotatory inertia of the transverse cross sections in the beam theory [2] will not yield a correct description of their stress-strain state, even in the vicinity of the first resonance.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00884490
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