Active control of road noise considering the vibro-acoustic transfer path of a passenger car

Kim, Seonghyun; Altınsoy, M. Ercan

doi:10.1016/j.apacoust.2022.108741

Cited by 21 publications

(2 citation statements)

References 28 publications

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“…After obtaining the order slice and frequency response function data of the target point and additional indicator points, the load identification under the primary and secondary paths was carried out using the SDOF and MB models in the OPAX modules [12]. The obtained workload and frequency response function were substituted into Equation ( 1) to obtain the contribution under different paths.…”

Section: Analysis Of the Contribution Of The Secondary Transmission Pathmentioning

confidence: 99%

Noise analysis of interior structure under powertrain excitation

Bai,

Wei,

Chen

2024

J. Phys.: Conf. Ser.

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To accurately identify the structural noise problem caused by vibration in the cockpit, an experimental study was conducted on a certain type of SUV under uniform acceleration conditions. Based on the planning of the multi-body system dynamics model, a transfer path model with secondary contributions is constructed, and the load is identified using the single degree of freedom model and multi-frequency bandwidth model under the OPAX method based on this path. The results indicate that the second-order vibration of the powertrain is transmitted to the entire suspension system through the X direction of the right suspension. The second-order vibration of the suspension system is then transmitted to the Z direction of the right rear bolt of the subframe, causing the entire subframe vibration and ultimately reaching the target point. This structural path has the greatest impact on the interior noise of the vehicle. This path research method can more accurately determine the main excitation points that cause interior noise problems on a certain path and better understand the overall energy transfer characteristics along the transmission path.

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Section: Analysis Of the Contribution Of The Secondary Transmission Pathmentioning

confidence: 99%

Noise analysis of interior structure under powertrain excitation

Bai,

Wei,

Chen

2024

J. Phys.: Conf. Ser.

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“…27,28 In recent years, the technology of active noise cancellation has drawn a great deal of attention and has begun to be implemented in the vehicle. 29 These methods promote the development of suppressing the TACR noise. However, these add-on instruments would somehow increase the mass and cost of the vehicle, which is against the lightweight and low-cost trend in industrialized production.…”

Section: Introductionmentioning

confidence: 99%

Research on acoustic-structural coupling model and tire parameters of tire acoustic cavity resonance noise

Bao,

Feng,

Zhao

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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Tire acoustic cavity resonance (TACR) noise is one kind of low-frequency and narrowband noise that particularly annoys passengers, especially becomes more prominent in electric vehicles. This paper demonstrates a numerical investigation on the TACR noise via the acoustic-structural coupling finite element model. The accuracy of this coupling finite element model is validated both by the analytic method based on the superposition theory of traveling waves and experimental modal tests of tire cavities. According to the simulated models, the influences of external factors including the inflation pressure and road load on the TACR noise are studied. Meanwhile, as the main constituent component in the tire model, the effect of belt cord is also discussed. To design the low-TACR noise tire, various design parameters of the inner contour in tire cavity are analyzed. By the orthogonal test and range analysis, it is found that the contour parameters can slightly affect the modal frequency and sound pressure of TACR noise. Among these, the curvature radius of the tire shoulder ρ 4, tire sidewall ρ 5, and half-section height H have a more obvious influence on the TACR noise than the curvature radius of the tire crown region ρ 2 and transition region ρ 3. Meanwhile, it also illustrates that increasing the curvature radius at the tire shoulder ρ 4 and reducing the half-section height H has a reduction effect on the TACR noise. This study can contribute to the design of low road noise tires.

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Advanced Ultrasound Energy Transfer Technologies using Metamaterial Structures

Imani,

Kim,

Shin

et al. 2024

Advanced Science

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Wireless energy transfer (WET) based on ultrasound‐driven generators with enormous beneficial functions, is technologically in progress by the valuation of ultrasonic metamaterials (UMMs) in science and engineering domains. Indeed, novel metamaterial structures can develop the efficiency of mechanical and physical features of ultrasound energy receivers (US‐ETs), including ultrasound‐driven piezoelectric and triboelectric nanogenerators (US‐PENGs and US‐TENGs) for advantageous applications. This review article first summarizes the fundamentals, classification, and design engineering of UMMs after introducing ultrasound energy for WET technology. In addition to addressing using UMMs, the topical progress of innovative UMMs in US‐ETs is conceptually presented. Moreover, the advanced approaches of metamaterials are reported in the categorized applications of US‐PENGs and US‐TENGs. Finally, some current perspectives and encounters of UMMs in US‐ETs are offered. With this objective in mind, this review explores the potential revolution of reliable integrated energy transfer systems through the transformation of metamaterials into ultrasound‐driven active mediums for generators.

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Active control of road noise considering the vibro-acoustic transfer path of a passenger car

Cited by 21 publications

References 28 publications

Noise analysis of interior structure under powertrain excitation

Noise analysis of interior structure under powertrain excitation

Research on acoustic-structural coupling model and tire parameters of tire acoustic cavity resonance noise

Advanced Ultrasound Energy Transfer Technologies using Metamaterial Structures

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