Non - linear dynamic analysis of thin - walled tapered towers with concentrated masses

摘要

The present paper, deals with the non-linear dynamic analysis of a thin-walled tower with varying gross-section and concentrated masses. It, especially, deals with the effect of the rotary inertias of those masses, which have been neglected up to now. Using the Galerkin's method, we can find the spectrum of the eingenfrequencies and, also, the shape flinctions. Finally, we can solve the equations of the problem of the forced vibrations, by using the Carson-Laplace's transformation. Applying this method on a tall mast with 2 concentrated masses, we can examine the effect of the inertias rotary of the above masses, because of seismic loads and, also, harmonic loads, caused by wind forces.