Determination of effective loss factors in reduced SEA models

Chimeno Manguan, Marcos and Fernández de las Heras, María José and Roibás Millán, Elena and Simón Hidalgo, F. (2017). Determination of effective loss factors in reduced SEA models. "Journal of Sound and Vibration", v. 386 ; pp. 311-326. ISSN 0022-460X. https://doi.org/10.1016/j.jsv.2016.09.035.

Description

Title: Determination of effective loss factors in reduced SEA models
Author/s:
  • Chimeno Manguan, Marcos
  • Fernández de las Heras, María José
  • Roibás Millán, Elena
  • Simón Hidalgo, F.
Item Type: Article
Título de Revista/Publicación: Journal of Sound and Vibration
Date: 2017
ISSN: 0022-460X
Volume: 386
Subjects:
Freetext Keywords: Statistical energy analysis; loss factors; experimental SEA; reduced models
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The definition of Statistical Energy Analysis (SEA) models for large complex structures is highly conditioned by the classification of the structure elements into a set of coupled subsystems and the subsequent determination of the loss factors representing both the internal damping and the coupling between subsystems. The accurate definition of the complete system can lead to excessively large models as the size and complexity in-creases. This fact can also rise practical issues for the experimental determination of the loss factors. This work presents a formulation of reduced SEA models for incomplete systems defined by a set of effective loss factors. This reduced SEA model provides a feasible number of subsystems for the application of the Power Injection Method (PIM). For structures of high complexity, their components accessibility can be restricted, for instance internal equipments or panels. For these cases the use of PIM to carry out an experimental SEA analysis is not possible. New methods are presented for this case in combination with the reduced SEA models. These methods allow defining some of the model loss factors that could not be obtained through PIM. The methods are validated with a numerical analysis case and they are also applied to an actual spacecraft structure with accessibility restrictions: a solar wing in folded configuration.

More information

Item ID: 52646
DC Identifier: http://oa.upm.es/52646/
OAI Identifier: oai:oa.upm.es:52646
DOI: 10.1016/j.jsv.2016.09.035
Official URL: https://www.sciencedirect.com/science/article/pii/S0022460X16305016
Deposited by: Memoria Investigacion
Deposited on: 04 Dec 2018 12:16
Last Modified: 04 Dec 2018 12:16
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