Definition and Calculation of Transmission Paths Within An S.E.A. Framework

Magrans, Francesc Xavier

doi:10.1006/jsvi.1993.1257

Cited by 25 publications

(28 citation statements)

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“…As the paths get longer their contribution decreases because as said n-1 ) B n -0. A series like (15) was first proposed for SEA systems in [40], see also [13,23,32,40]. As will be shown next, (15) constitutes the key to link SmEdA with graph theory.…”

Section: Modal Energy Transmission Paths In Smedamentioning

confidence: 97%

A graph theory approach to identify resonant and non-resonant transmission paths in statistical modal energy distribution analysis

Aragonès

Maxit

Guasch

2015

Journal of Sound and Vibration

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International audienceStatistical modal energy distribution analysis (SmEdA) extends classical statistical energy analysis (SEA) to the mid frequency range by establishing power balance equations between modes in different subsystems. This circumvents the SEA requirement of modal energy equipartition and enables applying SmEdA to the cases of low modal overlap, locally excited subsystems and to deal with complex heterogeneous subsystems as well. Yet, widening the range of application of SEA is done at a price with large models because the number of modes per subsystem can become considerable when the frequency increases. Therefore, it would be worthwhile to have at one's disposal tools for a quick identification and ranking of the resonant and non-resonant paths involved in modal energy transmission between subsystems. It will be shown that previously developed graph theory algorithms for transmission path analysis (TPA) in SEA can be adapted to SmEdA and prove useful for that purpose. The case of airborne transmission between two cavities separated apart by homogeneous and ribbed plates will be first addressed to illustrate the potential of the graph approach. A more complex case representing transmission between non-contiguous cavities in a shipbuilding structure will be also presented

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Section: Modal Energy Transmission Paths In Smedamentioning

confidence: 97%

A graph theory approach to identify resonant and non-resonant transmission paths in statistical modal energy distribution analysis

Aragonès

Maxit

Guasch

2015

Journal of Sound and Vibration

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“…Paths are computed in SEA according to (2), and all group [4] and individual [6] classification schemes are based on its use. However, the weight of any arc w ij ¼ η ij =η j only considers definite values for η ij and η j , without taking into account that these are SEA parameters, and thus have some uncertainty.…”

Section: Deterministic and Stochastic Sea Graphsmentioning

confidence: 99%

“…Consequently, finding and classifying this set of paths becomes of interest to identify and remedy possible high frequency vibro-acoustic problems in structures. As noted in [3], up to date path classification had mostly relied on experience and intuition due to the prohibitive computational cost of the somehow naive approach of straightforward computing and then sorting paths, though some useful clues could be glanced from the analysis of groups of paths in [4] (see also [2]). Yet, the possibility to rank contributions of individual paths in an efficient way has been made possible recently by establishing a connection between SEA and graph theory [5].…”

Section: Introductionmentioning

confidence: 98%

Ranking paths in statistical energy analysis models with non-deterministic loss factors

Aragonès

Guasch

2015

Mechanical Systems and Signal Processing

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“…In the open literature (De Klerk & Rixen, 2010;De Klerk & Ossipov, 2010;Gajdatsy et al, 2009;Janssens et al, 2011;Lennström et al, 2014;Magrans, 1981;Magrans, 1993;Padilha & De Frana Arruda, 2006), various approaches have been reported in order to define the passive transfer paths that vibrations or acoustic signals use to propagate through the vehicle. One of these methods, the Transfer Path Analysis (TPA), was first developed in the early '80s and was seen as a tool to improve the NVH performance of several systems.…”

Section: Introductionmentioning

confidence: 99%

Comparison between transfer path analysis methods on an electric vehicle

et al. 2017

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A comparison between transfer path analysis and operational path analysis methods using an electric vehicle is presented in this study. Structure-borne noise paths to the cabin from different engine and suspension points have been considered. To realise these methods, two types of test have been performed; operational tests on a rolling road and hammer tests in static conditions. The main aim of this work is assessing the critical paths which are transmitting the structure-borne vibrations from the electric vehicle's vibration sources to the driver's ear. This assessment includes the analysis of the noise contribution of each path depending on the frequency and vehicle speed range and moreover, the assessment of the path noise impact for harmonic orders which arise due to the physical components of the electric vehicle. Furthermore, the applicability of these methods to electric vehicles is assessed as these techniques have been extensively used for vehicles powered with internal combustion engines

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Definition and Calculation of Transmission Paths Within An S.E.A. Framework

Cited by 25 publications

References 0 publications

A graph theory approach to identify resonant and non-resonant transmission paths in statistical modal energy distribution analysis

A graph theory approach to identify resonant and non-resonant transmission paths in statistical modal energy distribution analysis

Ranking paths in statistical energy analysis models with non-deterministic loss factors

Comparison between transfer path analysis methods on an electric vehicle

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