Interior Sound Quality Prediction of Pure Electric Vehicles Based on Transfer Path Synthesis

Qian, Kun; Hou, Zhichao; Liang, Jie; Liu, Ruixue; Sun, Dengke

doi:10.3390/app11104385

Cited by 8 publications

(5 citation statements)

References 26 publications

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“…The excitations are propagated to receiver points along the paths. The loads are typically interface forces (F) or volume velocities (Q) (e.g., in an engine mount, air intake and exhaust system), and the receiver responses are sound pressure (P t ) or vibration, (e.g., in-vehicle noise at the driver's ear, and structural vibration) [12,23].…”

Section: Theoretical Background Of Transfer Path Analysismentioning

confidence: 99%

“…The load was analyzed using matrix inversion approaches by substituting the mass term (i.e., Newton's second law of motion), with the transfer function. This approach has a range of uses in engineering [23]. The matrix inversion approach can be expressed using vibration characteristics (i.e., the acceleration value) acquired by operational vibration experiments and the inverse matrix of the transfer function, as given in Equations ( 2) and (3).…”

Section: Frequency Domain Analysis Of Tpamentioning

confidence: 99%

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Estimation of Impact Loads Transmitted to Vibro-Ripper Housing Using Transfer Path Analysis

Kim,

Park,

et al. 2023

Applied Sciences

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This study aimed to estimate impact loads delivered to vibro-ripper housing through link modules, together with loads transmitted in various directions. Housing vibration resulting from impact loads generated during the operating condition and frequency response functions were assessed by vibration and modal experiments, respectively. Vibration data and transfer functions were applied in a transfer path analysis (TPA) model to analyze the quantified impact loads transmitted through the key components of the vibro-ripper to its housing. Impact loads derived by TPA for different housing parts were compared with those in the tooth derived from load-cell measurements, validating the TPA method. As a result of the verification, the impact load calculated by the TPA method was 193.7 kN, whereas that from the striking force measured by the load cell was 220 kN, a difference of 12.3%. The results of this study may be important input values for numerical analysis in equipment design and can be used as key data for structural safety evaluation and optimization. In summary, this paper introduces the vibration-based TPA method and considers its applicability to construction machinery exposed to impact vibration and loads.

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Section: Theoretical Background Of Transfer Path Analysismentioning

confidence: 99%

Section: Frequency Domain Analysis Of Tpamentioning

confidence: 99%

Estimation of Impact Loads Transmitted to Vibro-Ripper Housing Using Transfer Path Analysis

Kim,

Park,

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Yin et al [27] eliminated road noise using active noise control through the application of an adaptive parallel filter method. Additionally, Qian et al [28] developed an equivalent sound quality model of the interior sound in electric vehicles, while Zhang et al [29] carried out research on the evaluation method of the interior sound quality of electric vehicles.…”

Section: Introductionmentioning

confidence: 99%

Strategies for Reducing Booming Noise Generated by the Tailgate of an Electric Sport Utility Vehicle

Kim,

Jeon,

Lee

et al. 2023

Applied Sciences

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This article investigates the source of booming noise emanating from the tailgate of an electric sport utility vehicle (SUV), along with proposed strategies to mitigate it. This annoying low-frequency booming noise, which significantly impacts interior sound quality, is less perceptible in conventional internal combustion engine vehicles. However, this noise is more readily detected in electric SUVs, highlighting the necessity for focused measures to reduce it. This study involved the measurement of booming noises during on-road vehicle tests to pinpoint their origins. Additionally, ODSs were extracted from the tailgate vibration signals to gain insight into its dynamic behavior. Modal tests were conducted on the tailgate to determine its dynamic characteristics and compared with driving test results to reveal the mechanism responsible for tailgate-induced booming noise. It was established that such noise is primarily due to the tailgate modes, resulting from a combination of rigid body motion in the fore-aft direction and deformation in the central section of the panel. An analytical model of the tailgate was developed using commercial finite-element analysis software to propose measures for reducing booming noise. Experimental findings validated this model’s accuracy. Structural enhancements were implemented to enhance the panel stiffness and improve the connection between the vehicle and tailgate via bushings to reduce the booming noise resulting from tailgate motion. Under random force inputs, the analytical results demonstrated a 13.8% reduction in maximum deformation in the tailgate model in the improved structural configuration with increased panel stiffness. This study identifies the mechanism generating booming noise, establishes a practical and simple dynamic model, and proposes improvement measures aimed at reducing the booming noise.

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“…Lennström et al [ 20 ] studied the perceived annoyance and prominence of tonal components of a purely electric car. Huang et al [ 21 ] proposed the interval analysis method for electric vehicle structure-borne noise problems and presented a case of interior noise reduction by means of EV suspension parameter changes. Qian et al [ 22 ] proposed a pure electric vehicle (PEV) interior sound quality model based on transfer path synthesis (TPS).…”

Section: Introductionmentioning

confidence: 99%

Dynamic NVH Numerical Analysis of Power Steering in the Presence of Lubricant in the System

et al. 2022

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The ongoing shift towards hybrid and electric vehicles has a strong impact on noise and vibration engineering. New, complex dynamic phenomena are brought to vehicle user attention due to the absence of internal combustion engines and the significant role in vehicle and drive feel perception. This paper presents an FEM (Finite Element Method) dynamic simulation model of an automotive Electric Power Steering assembly. Preliminary modal simulations and experiments as well as field data replication techniques were implemented to identify the phenomena and prepare and validate model components. A full dynamic model of an Electric Power Steering was presented, and fine-tuned including the presence of lubrication at the gear mesh interface. Experimental investigations were conducted alongside FEM simulations for various model setups. Linear and nonlinear contact stiffness models were implemented, as well as contact damping, and simulated at chosen assembly interfaces. The results indicated that in the case of NVH (Noise Vibration and Harshness) analysis of shock/impact originating problems, contact parameters used for static, quasi-static, and low velocity analyses were not applicable. Nonlinear and damped contact stiffness provided better results in such a case.

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Interior Sound Quality Prediction of Pure Electric Vehicles Based on Transfer Path Synthesis

Cited by 8 publications

References 26 publications

Estimation of Impact Loads Transmitted to Vibro-Ripper Housing Using Transfer Path Analysis

Estimation of Impact Loads Transmitted to Vibro-Ripper Housing Using Transfer Path Analysis

Strategies for Reducing Booming Noise Generated by the Tailgate of an Electric Sport Utility Vehicle

Dynamic NVH Numerical Analysis of Power Steering in the Presence of Lubricant in the System

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