ANALYSIS OF EFFECT OF DEAD LOADS ON NATURAL FREQUENCIES OF BEAMS USING FINITE-ELEMENT TECHNIQUES

The authors of this paper conceive a load-induced stiffness matrix and propose a beam element for using finite-element method, which accounts for the stiffening effect of dead loads. The element stiffness matrices, including the effect of dead loads, are obtained according to Hamilton's principle. The effect of dead loads on natural frequencies is analyzed by the finite-element method for simply supported and cantilever beams. Uniform load per unit length and concentrated load are the two types of dead load considered in the calculations. Results reveal that the natural frequencies increase when the effect of dead loads is included, and that the effect is more significant for cantilever beams than for simply supported beams. The validity of the proposed technique is verified by numerical examples. Although the results derived by the finite-element method are in agreement with those of Takabatake, the proposed method with a finite-element formulation is applied more easily to practical structures under various support conditions and various types of dead loads.

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  • English

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  • Accession Number: 00723369
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 29 1996 12:00AM