基于废旧胶粉沥青混凝土路面降噪效果分析

Analysis of Noise Reduction Effect of Asphalt Concrete Pavement Composed withWaste Rubber Powder

为了降低路面噪声,提高驾驶员的行车舒适性以及周边居民的生活品质,以大量试验数据为基础,采用ANSYS有限元仿真软件对胶粉沥青混凝土路面与普通沥青路面受冲击荷载作用的时间与速度、加速度、位移相互关系进行分析,构建胶粉沥青路面竖向加速度、位移、速度与时间关系模型,运用对偶原理分析胶粉沥青路面竖向速度的衰减规律,确立速度衰变值与时间关系模型;结合能量守恒原理探究胶粉沥青路面的降噪机理,揭示胶粉沥青路面可有效减弱轮胎与接触面的振动效应,相比普通沥青路面可使噪声值降低4.82 dB,响度降低28.4%,为利用废旧轮胎在道路工程中降低噪声提供一种新的研究思路。

In order to reduce road noise,improve the driving comfort of drivers and the quality of life of surrounding residents,the asphalt concrete pavement composed with waste rubber powder is developed and studied.Based on a large amount of test data,the finite element simulation software ANSYS is used to analyze the relationship among velocity,acceleration,displacement and time of the rubber powder asphalt concrete pavement and the ordinary asphalt pavement under impact load.And the relationship model of vertical acceleration,displacement,velocity and time of the rubber powder asphalt pavement is constructed.Based on the duality principle,the attenuation law of vertical velocity of the rubber powder asphalt pavement is analyzed,and the relationship model between velocity decay value and time is determined.Combined with the principle of energy conservation,the noise reduction mechanism of the asphalt pavement with rubber powder is explored,and the vibration effect in the contact surface between the tire and the asphalt pavement with rubber powder is effectively reduced.Compared with the ordinary asphalt pavement,the noise value of the asphalt concrete pavement composed with waste rubber powder is reduced by 4.82 dB,and the loudness is reduced by 28.4%.It provides a new research idea for the application of waste tires to reduce noise in road engineering.