Vibration and Noise Radiation Characteristics of Gear Transmission System

Abstract

This paper presents a comprehensive procedure to calculate steady dynamic response and noise radiation generated by a gear reducer. In this process, the bearing force is obtained by solving the transmission system dynamic model, which is taken as the excitation of the gearbox, the noise generated by the gearbox vibration is researched by using FEM/BEM, so the dynamic characteristics of gear transmission and gearbox structure are demonstrated. Then the time history of node dynamic response and noise spectrum of the gearbox are obtained, and the effect of the excitation of frequency doubling of mesh frequency on the gearbox vibration and noise radiation is illustrated. The changes in radiated noise of gear reducers with load are calculated respectively by using both simulation and Kato's formulae, and results agree well with each other. The frequency range of the gearbox resonance is obtained by analyzing the spectral maps of the vibration and noise under the case of engine speed steadily increased. The study provides useful theoretical guideline to the design of the gearbox.

Simulation of vibrational sources and vibroacoustic transfer in wind turbine drivetrains

“…The spring-damper connection represents the time-varying contact stiffness k m (t), which is evaluated from a sequence of quasistatic FE-calculations over one cycle. al [2]. Fig.…”

Impact of Application of Selected Composite Materials on the Weight and Vibroactivity of the Upper Gearbox Housing

“…Studies conducted on the vibroactivity of gearboxes so far have focused on the possibility of reducing vibration and noise levels [31,32,33,34], while allowing a small increase in weight [35,36]. It has been proven that the selection of specific geometrical features of the gearing [33,37,38,39] and the additional ribbing of the housing reduces the vibroactivity of the gearbox [34,36,40,41,42,43,44], but with a slightly increase in weight [36,45]. However, such an approach in the construction of e.g., motor vehicles is not advisable, as it directly contributes to increases in fuel consumption.…”

Investigation and optimization of valve train abnormal noise under idle condition

“…By optimizing the geometric parameters of the gearbox, such as the module, number of teeth, axial clearance, and backlash, it is possible to obtain a gear structure with high bending and contact strength and to minimize the torsional vibration, transmission error, and gear-rattling noise. 6 Zhou and Wenlei 7 introduced a comprehensive procedure to calculate the steady dynamic response and noise radiation generated by a gear reducer. The dynamic bearing force, gearbox vibration, and noise radiation were investigated in different rotational speed and load.…”

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