Experimental Study on Noise Sources Identifications of Diesel Engine

Yue, Dongpeng

doi:10.3901/jme.2004.06.192

Cited by 6 publications

(3 citation statements)

References 0 publications

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“…So the radiation than 10lgσ=30lg(f/f0) on the frequency band below critical frequency and σ=1 on the frequency band above critical frequency. For general inline engines, kr approximate 4 on the critical frequency f0 [7]. Radius of the equivalent sphere can be obtained from the sphere volume, so critical frequency of the engine can be determined.…”

Section: Principle Of Estimate Radiated Noise By Surface Vibrationmentioning

confidence: 99%

A Study on Estimating Gasoline Engine Radiated Noise Based on Surface Vibration Measurement

Cui

Gao

2014

AMM

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A study on the method of estimating gasoline engine radiated noise by measuring surface vibration is carried out. Firstly, the theoretical basis and test method is studied. Then an experiment is carried out on a four-cylinder gasoline engine. By measuring the engine surface vibration velocity, the sound power level of these engine parts and of the engine body is calculated. The result shows that the estimation of engine radiated noise is accurate. It shows the sound power level of gasoline engine can be predicted by surface vibration.

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Section: Principle Of Estimate Radiated Noise By Surface Vibrationmentioning

confidence: 99%

A Study on Estimating Gasoline Engine Radiated Noise Based on Surface Vibration Measurement

Cui

Gao

2014

AMM

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“…As the essential foundation of noise reduction, lots of noise source identification methods have been developed and applied in engineering, which can be divided into three types: traditional methods [4][5][6][7][8][9], methods based on signal processing [10][11][12][13][14], and methods based on the array technology [15][16][17][18][19][20]. Although traditional methods are simple in application, the results they provide are not accurate enough and noncomprehensive.…”

Section: Introductionmentioning

confidence: 99%

Diesel engine noise source identification based on EEMD, coherent power spectrum analysis and improved AHP

Zhang

Wang

Lin

et al. 2015

Meas. Sci. Technol.

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As the essential foundation of noise reduction, many noise source identification methods have been developed and applied to engineering practice. To identify the noise source in the board-band frequency of different engine parts at various typical speeds, this paper presents an integrated noise source identification method based on the ensemble empirical mode decomposition (EEMD), the coherent power spectrum analysis, and the improved analytic hierarchy process (AHP). The measured noise is decomposed into several IMFs with physical meaning, which ensures the coherence analysis of the IMFs and the vibration signals are meaningful. An improved AHP is developed by introducing an objective weighting function to replace the traditional subjective evaluation, which makes the results no longer dependent on the subject performances and provides a better consistency in the meantime. The proposed noise identification model is applied to identifying a diesel engine surface radiated noise. As a result, the frequency-dependent contributions of different engine parts to different test points at different speeds are obtained, and an overall weight order is obtained as oil pan > left body > valve chamber cover > gear chamber casing > right body > flywheel housing, which provides an effectual guidance for the noise reduction.

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“…The sound power is a key indicator to measure the level of powertrain noise [1][2][3][12][13] . According to the different test acoustic environments, the sound power test can be divided into the engineering method [4,9] , the reverberation chamber method and (semi-) anechoic chamber method [7] ; According to the different test transducers, the sound power test can be divided into the surface vibration based method [6,8,9] , the sound pressure based method [10][11] and sound intensity based method [8][9] . For the accurate, simple and convenient in implementation, semi-anechoic chamber sound pressure based method is the most commonly used powertrain sound power method in the automotive industry.…”

Section: Introductionmentioning

confidence: 99%

The Powertrain in Vehicle Sound Power Test Method Research

Wang

Shi

2013

AMM

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In this paper, an experimental study on the powertrain in vehicle sound power test was presented. The necessary parts retrofits and acoustic treatments for the powertrain sound power test in the vehicle were listed. The criteria and correction method of the appropriate background noise level for the powertrain sound power level test in the vehicle were discussed. The powertrain sound power tests in the vehicle were achieved in the low noise chassis Dynamometer in the semi-anechoic chamber. Based on the test results, the acoustic component contributions for the powertrain sound power levels were given .

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Experimental Study on Noise Sources Identifications of Diesel Engine

Cited by 6 publications

References 0 publications

A Study on Estimating Gasoline Engine Radiated Noise Based on Surface Vibration Measurement

A Study on Estimating Gasoline Engine Radiated Noise Based on Surface Vibration Measurement

Diesel engine noise source identification based on EEMD, coherent power spectrum analysis and improved AHP

The Powertrain in Vehicle Sound Power Test Method Research

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