Sound intensity transfer path analysis and its application to analyze the acoustics in vehicle interior

2018 ◽  
Vol 66 (3) ◽  
pp. 222-230 ◽  
Author(s):  
Yosuke Tanabe ◽  
Akira Inoue
Keyword(s):  
Path Analysis ◽  
Sound Intensity ◽  
Vehicle Interior ◽  
Transfer Path ◽  
Transfer Path Analysis ◽  
Intensity Transfer

scholarly journals Vibration Transfer Path Analysis and Path Ranking for NVH Optimization of a Vehicle Interior

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
B. Sakhaei ◽  
M. Durali
Keyword(s):  
Quality Assurance ◽  
Path Analysis ◽  
Critical Issue ◽  
Vehicle Interior ◽  
Noise And Vibration ◽  
Good Compliance ◽  
Transfer Path ◽  
Good Ability ◽  
Engine Mount ◽  
Transfer Path Analysis

By new advancements in vehicle manufacturing, evaluation of vehicle quality assurance has got a more critical issue. Today noise and vibration generated inside and outside the vehicles are more important factors for customers than before. So far several researchers have focused on interior noise transfer path analysis and the results have been published in related papers but each method has its own limitations. In present work, the vibration transfer path analysis and vibration path ranking of a car interior have been performed. As interior vibration is a source of structural borne noise problem, thus, the results of this research can be used to present the structural borne noise state in a vehicle. The proposed method in this paper does not need to disassemble the powertrain from the chassis. The procedure shows a good ability of vibration path ranking in a vehicle and is an effective tool to diagnose the vibration problem inside the vehicle. The simulated vibration spectrums in different speeds of the engine have a good compliance with the tested results; however, some incompatibilities exist and have been discussed in detail. The simulated results show the strength of the method in engine mount optimization.

Correlation-Based Transfer Path Analysis for Brake System-Induced Interfering Noise in the Vehicle Interior

2021 ◽  
Author(s):  
Pascal Drichel ◽  
Georg Jacobs ◽  
Matthias Wegerhoff ◽  
Philippe Stegmann
Keyword(s):  
Path Analysis ◽  
Brake System ◽  
Vehicle Interior ◽  
Transfer Path ◽  
Transfer Path Analysis

Case study: Separating source contributions of vehicle interior noise by operational transfer path analysis

2021 ◽  
Vol 69 (1) ◽  
pp. 39-52
Author(s):  
Ming-Hung Lu ◽  
Ming Une Jen ◽  
Dennis de Klerk
Keyword(s):  
Path Analysis ◽  
Interior Noise ◽  
Vehicle Interior ◽  
Noise Sources ◽  
Tire Noise ◽  
Transfer Path ◽  
Vehicle Interior Noise ◽  
Transfer Path Analysis ◽  
Noise Contribution

The perception of vehicle interior noise is a key quality index to customers and automakers alike. By tracing noise back to key noise sources and paths, one can focus their refinement efforts. Aiming at the most efficient way to identify the primary noise sources in a vehicle cabin, this article establishes a framework of operational transfer path analysis (OTPA) for separating contributions of noise sources by operational measurements only. OTPA model design, measuring essentials and synthesis method used for separating vehicle interior noise contributions from the powertrain, tires andwindwere described in detail. To comprehend the implementation of OTPA on noise source separation, this article also addresses an exemplification study on an electric vehicle. In the case study illustrated, both spectral map and order extractions were used to validate if the OTPA synthesized results of the powertrain noise contribution agreed with the measured results. Tire noise contribution was validated using the tires driven by the dynamometer along with all other systems switched off. With well-validated OTPA model for the powertrain and tires, further individual path breakdown of the powertrain and tire noise then was investigated to identify key contributors to the interior noise. After clearly separating interior noise contributions, one therefore could design effective countermeasures to mitigate the dominant noise sources. With appropriate scheme of measurement and synthesis, the OTPA technique could therefore effectively serve target setting and refinement focus at foremost noise contributors.

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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