随着轻轨的发展,噪声的污染越来越严重。声屏障作为一种降低交通噪声有效而经济的方法,将会在一定程度上得到发展。现在,人们对轻轨噪声关注程度的增加,如何有效地设置轻轨声屏障,使其更好地发挥降噪效果已经成为一个亟待研究的课题。从分析声屏障的降噪原理出发,研究声屏障的高度、位置、敷设的吸声材料等对轻轨降噪效果的影响。本文初设两套方案,声源为无限长线声源,采用德国shall 03类型（轨道中心线）,用直立型单侧吸声型声屏障,隔声材料为钢及钢化玻璃,吸声材料为纤维多孔吸声材料超级玻璃棉。方案一,声屏障高4m,一楼到七楼插入损失为19.41dB（A）～15.97dB（A）；方案二,声屏障高4.5m,一楼到七楼插入损失19.97dB（A）～15.99dB（A）。由降噪效果和经济性,确定方案一为最佳方案。通过分析得出：在尽量靠近声源处设置声屏障,增加声屏障的高度,在声屏障内侧敷设吸声材料,都将有利于取得更好的降噪效果。最后,介绍声屏障的设计目标值及计算方法并对其主要承重部件-立柱进行强度和连接校核。要求
With the development of the light railway,the noise pollution becomes very important problem.Sound barrier,an effective and comparatively inexpensive measure of controlling noise,will be developed to some degree.Recently,people pay more attention to the light railway noise.How to install the sound barrier effectively so as to make the noise reduction more effective has become an urgent research topic.Starting with the analysis of the noise reduction principle,this paper studied the influence of light railway sound barrier on light railway’s noise reduction effect in the three aspects：height,position,sound absorbing material.Thia page have worked out two precepts,the source is infinite line source,which use shall 03 shape of Germany(the centye of the railway);this two precepts use englong shaped and absorbing noise barrier,insulate material is steel and gla, absorbing material is super gla cotton with fibre holes.The first precept,the hight of noise barrier is 4m,the insert lo from the first floor to the senventh floor is 19.41dB（A）～15.97dB（A）;the second precept,the hight of noise barrier is 4.5m,the insert lo from the first floor to the senventh floor is19.97dB（A）～15.99dB（A）.the first precept is better,because the effect of noise reduction and the economy effect.From the analysis,we can achieve:the effect of noise reduction will more better,when the noise barrier is installed as near as the source,enhight the barrier, sound absorbing material is laid the inside of the barrier.At the last,this page introduces the design object and the calculate method of the barrier,and checks the main bearing aembly’s intension and connection if satisfied the require of using.
