Simulation Analysis On Vibration And Acoustic Radiation Of The Train Wheel

With the rapid development of transportation, rail transportation has become the lifelinetransportation in our country. Nowadays, the vibration and noise is increasingly brought intofocus while the high-speed railway has been developing rapidly, however, the wheel-railnoise is becoming the most prominent problem in train environmental issues. In this paper,the noise radiated from the sound source control point of view, to the wheel as the main objectof study in order to reduce the wheel in the wheel-rail system noise radiation for researchpurposes, on the basis of simulated real wheel-rail forces on the use of finite elementnumerical simulation and wheels boundary element method of combining acoustic simulation,the vibration characteristics of acoustic radiation characteristics of high-speed railway wheelsstudy provides a theoretical basis for future train wheel vibration and noise reduction. Thispaper focuses on the wheel vibration and noise to start the following research：1.We first track irregularity spectrum based on simulated wheel-rail vertical force, thenthe wheels based on the principle of structural dynamics. Completed the establishment ofthree-dimensional finite element model of the wheel, the wheel through modal analysis tounderstand the resonance frequencies and mode shapes, and the wheels harmonic analysis toverify the correctness of the model and to further draw the wheel vibration response ofadmittance.Establish wheel acoustic boundary element analysis model of transient dynamicresponse to the initial boundary conditions as a result of acoustic simulation and analysis ofacoustic radiation wheels, noise radiation compare different train speed of the wheel, and thewheel-rail contact of different positions on the wheel effects of acoustic radiation.2.The train wheels for the study, using simulated irregularity spectrum as a vertical forceof the wheel-rail wheels incentive structure, the use of procedures for programming the outputof the model, transient kinetic analysis, the wheel-rail force displacement and accelerationcurve domain, analyzing vibration response and high frequency vibration characteristics ofthe wheel.3.Finite element analysis and establish wheel acoustic boundary element analysis ofrelevance, get the wheels acoustic boundary element analysis model to analyze the effects ofradiation efficiency of the wheel wheels structural noise radiation. The use of the wheel-railvertical force as a result of the initial transient dynamic response simulation of acousticboundary conditions on wheels sound radiation analysis, acoustic radiation characteristics ofthe wheel. Noise comparing different radiation train speed wheels and wheel-rail contact ofdifferent positions on the wheel sound radiation. 4.The wheel acoustic BEM model is divided into different sections, based on the wheel noisesimulation analysis, using acoustic transfer vector ATV analysis contribution of each sector ofthe wheel noise radiation, build relationships spatial sound field field point and the wheelsurface, by comparing the impact of different sections of the wheel noise radiation todetermine the maximum radiated noise wheel surface area, providing a theoretical basis forthe future wheel vibration and noise reduction.