摘要
轮轨噪声在轨道交通噪声中占主要部分。根据国内外对钢轨振动和噪声关系的研究,以非弹性和弹性支承块式轨道结构的振动加速度数据为依据,利用钢轨振动与噪声关系将钢轨的振动转化为噪声,确定由各自钢轨产生的噪声1/3倍频程等效声压级曲线,从降噪方面评价两种无碴轨道的性能,说明弹性支承块轨道振动与噪声强度关系。在理论上对地面因素在噪声传播中的影响进行了探讨,说明地面因素也是影响噪声强度不可忽视的因素之一。最后,从声源和传播途径两个方面提出降低噪声的合理化建议。
Wheel/rail noise is the main part of urban rail transit noise. Based on domestic and overseas researches on the relation between rail vibration strength and noise, which are calculated through the acceleration data on non-elastic & elastic supporting block track structures,this paper evaluates the performance of 2 kinds of ballastless track structures from the aspect of reducing noise and illustrates the relation between vibration strength and noise of the elastic supporting block track. This paper also discusses the theory of the effect of ground factors on sound wave propagating, argues that the ground factors shall not be ignored because their strong influence over the noise strength, and therefore the noise shall be reduced from both noise source & propagation paths.
出处
《城市轨道交通研究》
2005年第1期50-52,共3页
Urban Mass Transit
基金
国家自然科学基金项目(50478111)
