A novel procedure for deriving approximate explicit expressions of the frequency response function (FRF) matrix of linear discretized structures with uncertain parameters is presented. The following main steps are required: (i) to decompose the deviation of the structural matrices with respect to their nominal values as sum of rank-one matrices; (ii) to derive the so-called Rational Series Expansion (RSE) which provides an approximate explicit expression of the FRF holding for any uncertainty model. The potentials of the RSE are demonstrated within the interval framework by determining the region of the modulus of the FRF of structures with uncertain-but-bounded parameters.

Explicit frequency response functions of discretized structures with uncertain parameters / Muscolino, G; Santoro, R; Sofi, Alba. - In: COMPUTERS & STRUCTURES. - ISSN 0045-7949. - 133:(2014), pp. 64-78. [10.1016/j.compstruc.2013.11.007]

Explicit frequency response functions of discretized structures with uncertain parameters

SOFI, Alba
2014-01-01

Abstract

A novel procedure for deriving approximate explicit expressions of the frequency response function (FRF) matrix of linear discretized structures with uncertain parameters is presented. The following main steps are required: (i) to decompose the deviation of the structural matrices with respect to their nominal values as sum of rank-one matrices; (ii) to derive the so-called Rational Series Expansion (RSE) which provides an approximate explicit expression of the FRF holding for any uncertainty model. The potentials of the RSE are demonstrated within the interval framework by determining the region of the modulus of the FRF of structures with uncertain-but-bounded parameters.
2014
Frequency response function, Uncertain parameters, Explicit solutions, Improved interval analysis, Upper bound and lower bound
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/6106
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