An Investigation and Validation of Tailpipe Noise Contribution to Vehicle Cabin via Transfer Path Analysis Concept

Ju, C.; Yoo, Sung Woo

doi:10.4271/2009-01-2044

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…For the structure-borne transfer path, experimental transfer path analysis (TPA) is a fairly well-established technique [3][4][5][6][7] for the estimation and ranking of individual noise or vibration contributions via the different structural transmission paths from the point-coupled powertrain to the vehicle body. In recent years it has been used in a fuel cell vehicle (FCV) to identify and rank the main structure-borne noise paths.…”

Section: Introductionmentioning

confidence: 99%

Transfer path analysis and control of vehicle structure-borne noise induced by the powertrain

Guo

Qiu

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part D:

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Because of the higher requirements for vehicle comfort and people's increasing ecological consciousness, research on the interior noise in a vehicle has received wide concern, among which structure-borne noise is hard to diagnose and control. To solve the problem, the transfer path analysis method of powertrain structure-borne noise has been systematically analysed. By introduction of the powertrain source-path-receiver model, this method enables us to estimate and study the vibro-acoustic transfer functions and their operational forces. Since structure-borne noise is composed of multiple paths, the aim of this paper is to discuss different synthesis methods for this noise. On the basis of previous discussion, the transfer path analysis test of a certain vehicle is carried out, and the transfer function and operational data at idle and second-gear wide-open throttle are obtained. The test data are processed and an acoustic contribution analysis of the target is performed using LMS software. The results of analysis show that the right-hand side mount represents the main contribution path. Then the match principle of the bracket dynamic stiffness of the powertrain isolation system is proposed. On the basis of the transfer path analysis results and the above principle, the bracket on the body side of the right-hand side mount is improved by combination of the experimental transfer path analysis and the finite element method. The test results show that the A-weighted sound pressure level of the interior noise at idle and second-gear wide-open throttle are reduced by 2.9 dB(A) and 4 dB(A) respectively after improvement. Also there is no obvious booming noise at second-gear wide-open throttle. It is expected that this paper can help automotive noise, vibration and harshness engineers to perform trouble shooting and sound design.

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Section: Introductionmentioning

confidence: 99%

Transfer path analysis and control of vehicle structure-borne noise induced by the powertrain

Guo

Qiu

et al. 2012

Proceedings of the Institution of Mechanical Engineers, Part D:

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Study on interior noise control of minibus based on structural acoustic radiation

Xiao

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part D:

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Aiming at the problem of excessive low-frequency noise inside a minibus, the interior noise control scheme was studied to improve the NVH (Noise, Vibration, and Harshness) performance of the vehicle based on the characteristics of the structural acoustic radiation. With acoustic contribution as the evaluation index, the ability of the structure to radiate noise to the vehicle was studied from the perspective of modal participation and panel contribution. In this study, the legacy finite element model of the vehicle was firstly established, and the model was validated through the modal test of the BIW (Body in White), and the noise transfer function analysis was carried out to identify the critical frequency points. Furthermore, the improved super element method (SEM) was used to establish the super element simulation model of the vehicle, the simulation analysis of the modal contribution and panel contribution was carried out for the critical frequency points, and the panels that provide the main contribution were determined. In addition, a single-factor experimental study was carried out on the position of the critical panel by using the dynamic vibration absorbers with different performance parameters, so as to verify the accuracy of the simulation results of the panel acoustic contribution for the critical frequency. Finally, the structural optimization schemes of the critical panels were designed and verified by experiments. It was indicated that optimizing the acoustic radiation characteristics of the structure by improving the body panel structure to reduce interior noise was feasible.

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An Investigation and Validation of Tailpipe Noise Contribution to Vehicle Cabin via Transfer Path Analysis Concept

Cited by 2 publications

References 6 publications

Transfer path analysis and control of vehicle structure-borne noise induced by the powertrain

Transfer path analysis and control of vehicle structure-borne noise induced by the powertrain

Study on interior noise control of minibus based on structural acoustic radiation

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