Forced Vibrations of silos leading to buckling

FLORES FERNANDO G.; GODOY LUIS A.

JOURNAL OF SOUND AND VIBRATION

ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 1999 vol. 224 p. 431 - 454

0022-460X

The large-amplitude force vibrations of steel thin-walled when empty are investigated. The basic geometry configuration modeled is a cylinder clamped at the bottom with a conical roof. Wind pressure distributions are assumed as non-axisymmetric in the circumferential direction and with a rectangular impulse or step distribution in time. Instability is identified from finite-element computations of the time response of the shell using a criterion due to Budiansky and Roth. Results are computed for silos made with plain as well as with corrugated sheets, and the influence of geometric imperfections and the stiffening due to the roof are included in the analysis. The problems are also modeled with static pressures using both continuation techniques and bifurcation analysis from a linear fundamental path. Additional results have been obtained to estimate the dynamic buckling load for step loading using energy procedures. All results are computed using finite-element codes developed by the authors.