FULL STOCHASTIC RESPONSE, PSEUDO EXCITATION METHOD AND PSEUDO EQUIVALENT DETERMINISTIC EXCITATION: TWO SIMPLE SYSTEMS (Contributo in atti di convegno)

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  • FULL STOCHASTIC RESPONSE, PSEUDO EXCITATION METHOD AND PSEUDO EQUIVALENT DETERMINISTIC EXCITATION: TWO SIMPLE SYSTEMS (Contributo in atti di convegno) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Alternative label
  • Sergio De Rosa, Francesco Franco, Elena Ciappi (2012)
    FULL STOCHASTIC RESPONSE, PSEUDO EXCITATION METHOD AND PSEUDO EQUIVALENT DETERMINISTIC EXCITATION: TWO SIMPLE SYSTEMS
    in NOVEM 2012 Noise and Vibration: Emerging Methods, Sorrento (Napoli) - Italia, 1-4 Aprile 2012
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Sergio De Rosa, Francesco Franco, Elena Ciappi (literal)
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  • - paper n. 035; - NOVEM 2012 is the 4th in the conference series (literal)
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  • Proceedings of the NOVEM 2012 Conference noise and vibration emerging methods (literal)
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  • 12 (literal)
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  • Dipartimento di Ingegneria Industriale Sezione Aerospaziale Università di Napoli Federico II, CNR-INSEAN (literal)
Titolo
  • FULL STOCHASTIC RESPONSE, PSEUDO EXCITATION METHOD AND PSEUDO EQUIVALENT DETERMINISTIC EXCITATION: TWO SIMPLE SYSTEMS (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 9788890648403 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • F. De Rosa, S. Franco; F. Marulo, T. Polito (literal)
Abstract
  • The computational costs associated to the analysis of a stochastic response of a linear system can become unacceptable high, when using a full modal representation. Here, a new approach is proposed by invoking a pseudo equivalent deterministic excitation (PEDE). This is based on the given spectral load representation of which each column is used in a deterministic approach. The method allows a good representation without using the load eigenvalues and eigenvectors; these are used in the pseudo excitation method, (PEM), which can be considered as an exact representation being based on the modal decomposition of the spectral excitation. The two approaches are compared with a full stochastic response for two simple systems: a chain of five oscillators (mass and stiffness) and a plate. Both the system are considered excited by a spectral load representing the classical form due to Corcos for the wall pressure distribution due to a turbulent boundary layer. A dimensionless representation of the frequency axis is also used; on this scale, the results demonstrated that in the first frequency ranges the PEDE is a very useful approximation. (literal)
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