Prediction Method of Gear Noise Considering the Influence of the Tooth Flank Finishing Method

Masuda, Teruo; Abe, Toru; Hattori, Kanji

doi:10.1115/1.3269309

Cited by 17 publications

(10 citation statements)

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“…In case the rotary speed is constant, the change of radiated noise and load torque conforms to the conclusion that reducer noise and 20logW are in proportion drawn by Niemann and Kato 3 namely where N T is the load coefficient of proportion, T is the load torque, L ( T ) is the sound pressure level when load torque is T.…”

Section: Influence Of Operating Condition On Noise Radiation Under Hesupporting

confidence: 73%

“…Since Kato formula fails to embody natural frequency of the transmission system, the changing trend of the result dependent on linear speed of gear addendum is smooth, and the noise of reducer is increased with the increase of rotary speed. 3 Calculation by FEM/BEM is not only to take dynamic characteristics of the gear reducer into consideration, therefore, the noise curve is fluctuant to a certain extent. In case of 750 r/min, since the 6-times gear frequency component in the excitation is closer to the first-order natural frequency of the transmission system, the transmission system generates larger vibration, and making noise radiation curves a and b deviate from d 1 =7 dB; in case of 2100 r/min, since 2-times component (1398 Hz) of meshing force is closer to the second-order natural frequency of gearbox, it results in larger vibration in gearbox making noise radiation deviate from d 2 =5 dB, if the two resonance positions are not considered, the deviation of two curves in other positions is within 3dB, accordingly, and it is observed that results of simulation calculation and results of calculation by Kato are consistent.…”

Section: Influence Of Operating Condition On Noise Radiation Under Hementioning

confidence: 99%

“…In early stage, based on much research of experiments and tests, scholars obtained empirical formula for estimating noise intensity of gear pair. [1][2][3] The appearance of numerical methods (such as finite element method (FEM) and boundary element method (BEM)) has substantially supported research of reducer's vibration and noise. The FEM/BEM method is the prevailing method applied to the numerical analysis for the reducer vibration and noise.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Vibration and noise characteristics of a gear reducer under different operation conditions

Zhou

Cao

2019

Journal of Low Frequency Noise, Vibration and Active Control

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Gear system is characterized by high efficiency, compact structure, and transmission ratio stability, and it has been extensively applied in various industrial equipment. This paper presents a novel preliminary estimate method for gear reducer noise radiation and vibration characteristics, and systematic researches on radiation characteristics of gear reducer are made. In the noise analysis process, the influence of time-varying mesh stiffness, error excitation, and tooth flank contact feature are comprehensively considered, the linear vibration model and nonlinear vibro-impact model for transmission system is set up, and then the dynamic load of the gearbox is obtained by solving the model. The dynamic load of bearing is taken as an excitation, the finite element method/boundary element method is adopted to analyze vibration and noise radiation characteristics of the gear reducer. The time domain response and field point noise spectrum at sound field are obtained, and the influence of harmonic components in excitation on vibration noise radiation of gearbox are discussed. The dynamic characteristics and sound radiation characteristics of gear reducer under different operating conditions are calculated, the change pattern of frequency component of the bearing dynamic load and noise radiation based on operating condition are obtained, and some interesting conclusions are observed from research that the gearbox produce the linear vibration and noise under the heavy load condition. Meanwhile, the nonlinear vibro-impact and noise is appeared under light load condition. The distribution of the gearbox radiated nose is uniform in various conditions, but noise takes sub-harmonic components as fundamental frequency and more peaks in the noise spectrum are observed. With the increase of the rotary speed, the noise tallies with the trend described by Kato formula except that under the gear system resonance speed. The impact force between teeth flanks shall be on the increase with the increase of rotary speed, and gear pair vibration experiencing a course from irregular vibration to regular periodic rattle vibration. With the increase of load, the noise of reducer changes with load as the variation of logarithmic function. For the noise in the process with load on the increase from no-load (the load is 0), the gear reducer vibration condition experienced both sides collision, single-side collision, and normal meshing in three stages. The radiated nose is increased gradually, but the abrupt change happened in critical positions between both sides collision and single-side collision as well as single-side collision and normal meshing in the process. The conclusions of this paper will offer theoretical basis for reducer to reduce vibration and noise.

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Section: Influence Of Operating Condition On Noise Radiation Under Hesupporting

confidence: 73%

Section: Influence Of Operating Condition On Noise Radiation Under Hementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vibration and noise characteristics of a gear reducer under different operation conditions

Zhou

Cao

2019

Journal of Low Frequency Noise, Vibration and Active Control

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“…By adding a dynamic term to the Kato [17] equation, which determines the general noise level using the gear's specification data, a semi-empirical equation has been developed that takes into account the effect of the tooth side surface finishing method. It was stated that the data obtained from the test gears through the experiments were in accordance with the data obtained from the equation with 5 dB tolerance [18]. KISSsoft commercial software calculates the noise level in gear wheels based on the Masuda equation.…”

Section: Masuda Gear Noise Equationmentioning

confidence: 73%

Effect of Profile Modification on Noise in Involute Gear Pair

Menküç

Uysal

Topgül

2021

International Journal of Automotive Science and Technology

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Ensuring regular movement and power transmission in gear wheels is possible with a suitable tooth profile. Although involute profiles have a structure that can provide conjugate movement in accordance with the law of gearing, transmission errors that cause vibration and noise occur due to the flexibility of the elements in the gear system under dynamic conditions. Transmission errors occur depend-ing on many parameters from production to the oil and lubrication system. In this study, the vibration and noise state generated during transmission in gears were investigated in relation to geometric parameters. In the reference gear pair as-sumption, the noise levels were evaluated for the four cases created due to the change of different geometric parameters. The effect of profile modification on vibration and noise was addressed, and optimum profile modification parameters for the reference gear pair were analyzed with KISSsoft commercial software. The effects of geometric parameters and profile modification on noise level are shown in graphs. With the application of the Tip Relief method, a significant de-crease in the noise level has been observed.

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“…In the early stages of research, empirical formulas for the estimation of the noise intensity of a gear pair were obtained based on many experiments [11]- [13]. However, these acoustic estimates may not be suitable for other gearboxes, as the radiated noise depends strongly on the shape of the housing.…”

Section: Introductionmentioning

confidence: 99%

An Improved Computational Method for Vibration Response and Radiation Noise Analysis of Two-Stage Gearbox

et al. 2020

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In this work, an improved computational method for the prediction of the vibration and noise of a gearbox that considers the flexibility of the shaft is developed. Based on the finite element method (FEM), a coupled dynamic model of a spur gear-shaft-bearing system is established, and the time-varying mesh stiffness (TVMS), the time-varying bearing stiffness (TVBS), and the flexibility of the shaft are considered. The Newmark integration method (NIM) is utilized to obtain the dynamic load of the bearing. Furthermore, the proposed model is validated by experiments. The bearing load is then considered to be the excitation of the housing, and the radiated noise is calculated via the finite element method/boundary element method (FEM/BEM). The effects of the shaft flexibility on the bearing response and radiated noise are discussed based on the proposed method. The results demonstrate that, when the shaft flexibility is considered, the system undergoes the bending vibration of the shaft, and the vibration amplitude and excitation frequency components of the bearing load decrease significantly. Additionally, the main resonance mode of the gearbox is changed, and the radiated noise is enhanced. The effects of the input speed and shaft stiffness on the bearing response and radiated noise are also investigated. The results provide a theoretical basis for the further development of the vibration and noise reduction of gearboxes. INDEX TERMS Finite element method, gearbox, radiated noise, shaft flexibility, vibration response.

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Prediction Method of Gear Noise Considering the Influence of the Tooth Flank Finishing Method

Cited by 17 publications

References 0 publications

Vibration and noise characteristics of a gear reducer under different operation conditions

Vibration and noise characteristics of a gear reducer under different operation conditions

Effect of Profile Modification on Noise in Involute Gear Pair

An Improved Computational Method for Vibration Response and Radiation Noise Analysis of Two-Stage Gearbox

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