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Structural Engineering and Mechanics
  Volume 63, Number 4, August25 2017, pages 457-469

Parallel damage detection through finite frequency changes on multicore processors
Arcangelo Messina and Massimo Cafaro

    This manuscript deals with a novel approach aimed at identifying multiple damaged sites in structural components through finite frequency changes. Natural frequencies, meant as a privileged set of modal data, are adopted along with a numerical model of the system. The adoption of finite changes efficiently allows challenging characteristic problems encountered in damage detection techniques such as unexpected comparison of possible shifted modes and the significance of modal data changes very often affected by experimental/environmental noise. The new procedure extends MDLAC and exploits parallel computing on modern multicore processors. Smart filters, aimed at reducing the potential damaged sites, are implemented in order to reduce the computational effort. Several use cases are presented in order to illustrate the potentiality of the new damage detection procedure.
Key Words
    damage detection; natural frequency changes; MDLAC; parallel computing; inverse methods
Arcangelo Messina and Massimo Cafaro : Dipartimento di Ingegneria dell\'Innovazione, Universita del Salento, Lecce, Italy

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