scholarly journals Exactness of alternative force estimation methods and applications to power flow and transfer path analysis

2017 ◽  
Vol 141 (3) ◽  
pp. EL255-EL261
Author(s):  
Akira Inoue
Keyword(s):  
Path Analysis ◽  
Power Flow ◽  
Estimation Methods ◽  
Force Estimation ◽  
Transfer Path ◽  
Transfer Path Analysis

scholarly journals Application of Vibrational Power Flow to a Passenger Car for Reduction of Interior Noise

2000 ◽  
Vol 7 (5) ◽  
pp. 277-285 ◽  
Author(s):  
S.K. Lee
Keyword(s):  
Path Analysis ◽  
Noise Level ◽  
Decomposition Method ◽  
Power Flow ◽  
Vibration Isolation ◽  
Passenger Car ◽  
Isolation System ◽  
Transfer Path ◽  
Transfer Path Analysis ◽  
Vibrational Power Flow

Reduction of structure-borne noise in the compartment of a car is an important task in automotive engineering. Transfer path analysis using the vibroacoustic reciprocity technique or multiple path decomposition method has generally been used for structure-borne noise path analysis. These methods are useful for solving a particular problem, but they do not quantify the effectiveness of vibration isolation of each isolator of a vehicle. To quantify the effectiveness of vibration isolation, vibrational power flow has been used for a simple isolation system or a laboratory-based isolation system. It is often difficult to apply the vibrational power flow technique to a complex isolation system like a car. In this paper, a simple equation is derived for calculation of the vibrational power flow of an isolation system with multiple isolators such as a car. It is successfully applied not only to quantifying the relative contributions of eighteen isolators, but also to reducing the structure-borne noise of a passenger car. According to the results, the main contributor of the eighteen isolators is the rear roll mount of an engine. The reduced structure-borne noise level is about 5dBA.

The application of power-based transfer path analysis to passenger car structure-borne noise

2008 ◽  
Vol 222 (11) ◽  
pp. 2011-2023 ◽  
Author(s):  
X Han ◽  
Y-J Guo ◽  
Y-E Zhao ◽  
Z-Q Lin
Keyword(s):  
Path Analysis ◽  
Power Flow ◽  
Linear Network ◽  
Passenger Car ◽  
Transfer Path ◽  
Acoustic Cavity ◽  
Analysis Methodology ◽  
System Method ◽  
Transfer Path Analysis ◽  
And Control

Structure-borne noise in a passenger car is usually transmitted through multiple and/or multi-dimensional paths. Therefore, identification and control of these transfer paths are effective measures for noise reduction. A power-based transfer path analysis methodology is proposed for this purpose. First, the power flow of each transfer path is estimated with an equivalent-uncoupled-system method based on linear network theory and the Thevenin equivalent theorem. Next, the correlation between the power flow of each transfer path and the sound pressure in the passenger compartment is established; then the contribution of each transfer path is ranked; meanwhile the dominant paths and their key parameters are identified through the equations of power flow calculation. Finally, these key parameters can be analysed and then improved to reduce the structure-borne noise. An illustration of this methodology is given with a passenger car model containing a power plant, three mounts, a compliant car body, and an enclosed acoustic cavity. It is demonstrated that the methodology is effective to analyse and control the structure-borne noise transfer paths.

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.

scholarly journals Using transfer path analysis to assess the influence of bearings on structural vibrations of a wind turbine gearbox

Wind Energy ◽  
2014 ◽  
Vol 18 (5) ◽  
pp. 797-810 ◽  
Author(s):  
F. Vanhollebeke ◽  
J. Peeters ◽  
D. Vandepitte ◽  
W. Desmet
Keyword(s):  
Path Analysis ◽  
Wind Turbine ◽  
Structural Vibrations ◽  
Wind Turbine Gearbox ◽  
Transfer Path ◽  
Transfer Path Analysis

N & amp;V Integration and Optimization of Driveline Using Transfer Path Analysis

2012 ◽  
Author(s):  
Per-Olof Sturesson ◽  
Christer Svensson ◽  
Jan Weckner ◽  
Rikard Karlsson ◽  
Peter Söhr
Keyword(s):  
Path Analysis ◽  
Transfer Path ◽  
Transfer Path Analysis
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