Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Vibrations in Physical Systems

1 2012

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: masonry tower

Sortuj według:

Ogranicz wyniki do:

Modelling and identification of tower type historic buildings

Szymczak C., Tomaszewska A.

Vibrations in Physical Systems

2012

Vol. 25

411--416

In this paper the problem of parametric identification of a historic masonry tower model is discussed. The tower leans and its foundation stiffness is a concern to authorities. The authors identified some modal characteristics of the tower, natural frequencies and mode shapes. It is known, based on the first mode shape identified, that the structure behaves like a stiff solid on elastic foundation. Thus, a simple, five parameter plane model is considered. The unknown parameters are identified to be the solution to an optimisation problem, in which the sensitivity analysis and scatters of the modal identification are applied. A hierarchical process is formulated, where two natural frequencies are assumed to be the input data. In this approach, the number of unknown parameters increases incrementally, and the process changes from even-posed to under-posed successively. Such approach allows one to control the final under-posed identification problem and leads to an increasingly better solution.