A Study on Comparison between Input Powers and Contribution Rates from Statistical Energy Analysis and Transfer Path Analysis on a Mechanical Structure

2013 ◽  
Vol 7 (4) ◽  
pp. 504-515
Author(s):  
Katsuhiko KURODA ◽  
Toru YAMAZAKI
Keyword(s):  
Path Analysis ◽  
Energy Analysis ◽  
Statistical Energy Analysis ◽  
Mechanical Structure ◽  
Transfer Path ◽  
Transfer Path Analysis

Sound transmission paths through a statistical energy analysis model of mechanically linked aircraft double-walls

2021 ◽  
Vol 69 (5) ◽  
pp. 411-421
Author(s):  
Raef Cherif ◽  
Andrew Wareing ◽  
Noureddine Atalla
Keyword(s):  
Path Analysis ◽  
Energy Analysis ◽  
Transmission Loss ◽  
Dynamic Stiffness ◽  
Sound Transmission ◽  
Statistical Energy Analysis ◽  
Vibration Isolators ◽  
Transfer Path ◽  
Composite Sandwich ◽  
Transfer Path Analysis

Sound transmission loss (TL) through mechanically linked aircraft double-walls is studied with a statistical energy analysis method. An overview of the method is given with details on acoustic and structural transfer path analysis. The studied structure is composed of a thick composite sandwich panel representative of a skin panel, lined with an acoustic insulation layer (glass wool), and structurally connected via vibration isolators to a thin composite sandwich lining panel representative of a trim panel. Two types of vibration isolators are considered: a soft and rigid mechanical link. Various experimental methods were used to assess the accuracy of this model. This study shows the robustness of the simple four-pole modeling of isolators, which depends mainly on the importance of correctly determining the experimental dynamic stiffness of typical aircraft vibration isolators. The prediction of the TL while acceptable was, however, found less satisfactory for the soft configuration. This is traced to the uncertainties on the used coupling loss factor. Finally, a transfer path analysis is performed to identify the contribution of each transmission path in the entire frequency range of interest. Results show that non-resonant airborne transmission dominates in low frequencies, the airborne radiation is significant in the critical frequency region of the panels, while the structure-borne radiation increases the noise transmitted in the mid- and high-frequency ranges.

The application of the transfer path analysis (TPA) to mechanical structure with a variety of transfer paths

2016 ◽  
Vol 2016 (0) ◽  
pp. 357
Author(s):  
Yoshimune MORI ◽  
Akifumi YOSHIMURA ◽  
Nobutaka TUSJIUCHI ◽  
Akihito ITO ◽  
Atsushi FUJIMOTO ◽  
...  
Keyword(s):  
Path Analysis ◽  
Mechanical Structure ◽  
Transfer Path ◽  
Transfer Path Analysis

Application of Transfer Path Analysis (TPA) to a Mechanical Structure with a Variety of Transfer Paths

2016 ◽  
Author(s):  
Yoshimune Mori ◽  
Akifumi Yoshimura ◽  
Nobutaka Tsujiuchi ◽  
Akihito Ito ◽  
Atsushi Fujimoto ◽  
...  
Keyword(s):  
Path Analysis ◽  
Mechanical Structure ◽  
Transfer Path ◽  
Transfer Path Analysis

Vibration Transfer Path Analysis of Double-Layer Box for Marine Reducer

2021 ◽  
Author(s):  
Miaomiao Li ◽  
Qinwen Liu ◽  
Guanghao Dai ◽  
Weifang Chen ◽  
Rupeng Zhu
Keyword(s):  
Path Analysis ◽  
Double Layer ◽  
Transfer Path ◽  
Transfer Path Analysis

scholarly journals Identification of relevant acoustic transfer paths for WT drivetrains with an operational transfer path analysis

2021 ◽  
Author(s):  
W. Schünemann ◽  
R. Schelenz ◽  
G. Jacobs ◽  
W. Vocaet
Keyword(s):  
Path Analysis ◽  
Wind Turbine ◽  
Frequency Response ◽  
Mechanical System ◽  
Reference Point ◽  
Response Functions ◽  
Frequency Response Functions ◽  
Transfer Path ◽  
Transfer Path Analysis ◽  
Turbine Model

AbstractThe aim of a transfer path analysis (TPA) is to view the transmission of vibrations in a mechanical system from the point of excitation over interface points to a reference point. For that matter, the Frequency Response Functions (FRF) of a system or the Transmissibility Matrix is determined and examined in conjunction with the interface forces at the transfer path. This paper will cover the application of an operational TPA for a wind turbine model. In doing so the path contribution of relevant transfer paths are made visible and can be optimized individually.

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