Design And Optimization Of Damping Vibration Reduction And Noise Reduction Of Gearbox

Gearboxes are developing rapidly in the direction of high speed,high efficiency,heavy load,stable operation and long service time.Although the gearbox’s structure architecture has been significantly advanced and the transmission quality is high,it is commonly used in construction machinery.There are also several limitations to the use of the gearbox.The vibration and noise produced during the work process impact people’s work and life and more and more individuals are concerned about them.Therefore,more and more scholars are learning how to manage the vibration and noise of the gearbox.This paper would use sophisticated computer simulation technology to solve the gearbox-generated vibration and noise,predict the noise radiation and acoustic contribution of the gearbox,and suggest and validate an optimization strategy based on the results.The gearbox case is used as the carrier to perform analysis in this article.The most widely employed techniques are used to study the gearbox,such as finite element and boundary element,and the noise radiation and acoustic contribution of the gearbox case are collected.Two optimization design schemes are proposed based on the effects of simulation analysis: the first is to add a damping structure to the optimization goal area to reduce the gearbox vibration and noise;the second is to introduce acoustic black holes to the gearbox to achieve the purpose of suppressing structural vibration and reducing noise.This paper’s fundamental analyses are as follows.1)Conduct dynamic response analysis on the gearbox housing and noise analysis.The Abaqus program is used to measure the gearbox’s structural vibration acceleration reaction under the impact load,and using this as the boundary state,the sound pressure level of the gearbox is solved,and the contribution of the gearbox to the acoustic plate is collected.Provide a guide for applying restriction damping to the corresponding.2)Carry out vibration and noise reduction design for the plate with an enormous acoustic contribution.The constrained damping layer is pasted on the weak section of the gearbox to form a constrained damping structure,and the topological optimization of the damping structure of this plate is performed,and the dynamic response of the optimized gearbox box under the impact load is calculated to obtain the gearbox box The result of the radiated noise of the body is compared with the original structure noise.3)Study the effects of acoustic black hole structure’s vibration reduction and noise reduction.The finite element analysis of the thin plate with acoustic black holes is carried out,and the influence of various parameters of the acoustic black hole on the vibration of the thin plate structure is discussed.4)Study the noise reduction effect of the gearbox with an acoustic black hole structure.The acoustic black hole sheet structure is applied to the surface of the gearbox case,and the acoustic black hole sheet structure is established in the plate that has an immense contribution to the acoustics of the gearbox case.Moreover,the vibration and noise reduction effects of the acoustic black hole in the gearbox case structure are studied and compared with structure noise.