Determination of effective loss factors in reduced SEA models

Chimeno Manguan, Marcos; Fernández de las Heras, María José; Roibás Millán, Elena y 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.

Descripción

Título: Determination of effective loss factors in reduced SEA models
Autor/es:
  • Chimeno Manguan, Marcos
  • Fernández de las Heras, María José
  • Roibás Millán, Elena
  • Simón Hidalgo, F.
Tipo de Documento: Artículo
Título de Revista/Publicación: Journal of Sound and Vibration
Fecha: 2017
Volumen: 386
Materias:
Palabras Clave Informales: Statistical energy analysis; loss factors; experimental SEA; reduced models
Escuela: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Departamento: Aeronaves y Vehículos Espaciales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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.

Más información

ID de Registro: 52646
Identificador DC: http://oa.upm.es/52646/
Identificador OAI: oai:oa.upm.es:52646
Identificador DOI: 10.1016/j.jsv.2016.09.035
URL Oficial: https://www.sciencedirect.com/science/article/pii/S0022460X16305016
Depositado por: Memoria Investigacion
Depositado el: 04 Dic 2018 12:16
Ultima Modificación: 04 Dic 2018 12:16
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