http://www.cnr.it/ontology/cnr/individuo/prodotto/ID293295
The Method of the Pseudo Equivalent Deterministic Excitations (PEDEM) to Bound the Random Response (Contributo in volume (capitolo o saggio))
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- Label
- The Method of the Pseudo Equivalent Deterministic Excitations (PEDEM) to Bound the Random Response (Contributo in volume (capitolo o saggio)) (literal)
- Anno
- 2015-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1007/978-3-319-09713-8_14 (literal)
- Alternative label
Sergio De Rosa, Francesco Franco, Elena Ciappi (2015)
The Method of the Pseudo Equivalent Deterministic Excitations (PEDEM) to Bound the Random Response
Springer International Publishing, CH-6330 Cham (ZG) (Svizzera) in Flinovia - Flow Induced Noise and Vibration Issues and Aspects A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response, 2015
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Sergio De Rosa, Francesco Franco, Elena Ciappi (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
- Flinovia - Flow Induced Noise and Vibration Issues and Aspects A Focus on Measurement, Modeling, Simulation and Reproduction of the Flow Excitation and Flow Induced Response (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
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- Dipartimento di Ingegneria Industriale Sezione Aerospaziale Università di Napoli Federico II, CNR-INSEAN (literal)
- Titolo
- The Method of the Pseudo Equivalent Deterministic Excitations (PEDEM) to Bound the Random Response (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
- 978-3-319-09713-8 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
- Ciappi, E., De Rosa, S., Franco, F., Guyader, J.-L., Hambric, S.A. (literal)
- Abstract
- The analysis of the response of a stochastic system, through a discrete
coordinate set, can become computationally challenging, even when using a full
modal representation. Nevertheless, many dynamic load cases, in engineering
applications, have stochastic behaviour as the wall pressure fluctuations due to the
turbulent boundary layer. In this work, a new method is proposed: it is named as
frequency Modulated Pseudo Equivalent Deterministic Excitation, PEDEM, and it is
based on the Pseudo Excitation Method, PEM. This latter can be considered as an
exact representation since it uses a modal decomposition of the cross-spectral
density matrix of the excitation; the extraction of the eigensolutions of the load
matrix, at each frequency step, is a computational disadvantage. PEDEM overcomes
this issue by introducing some approximations based on the analysis of the eigen-
solutions of the dynamic load matrix versus frequency. Mainly, two different
approximations are proposed with reference to extreme frequency ranges (low and
high) wherein the dynamic matrix of a random and convective load has different
19 characteristics. A criterion to identify these frequency ranges is proposed versus a
20 dimensionless representation of the frequency. Moreover, it is shown that the pro-
21 posed approximations represent the bounding curves of the response for the whole
22 frequency range. Fruitful comparisons with a full stochastic approach is discussed. (literal)
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