摘要
为了分析弹性扣件对城市轨道交通列车车内噪声声品质的影响,在不同车速情况下进行弹性扣件和普通扣件地段地铁列车车内噪声测试,利用不同的声品质客观评价参数评价车内噪声,对比分析弹性扣件和普通扣件地段车内噪声声品质。结果表明:在车速不高于40km/h时,车内中低频噪声是主要影响因素,应该把降低中低频噪声作为车内降噪的重点;车内噪声的A声级、响度、烦扰度和语言干扰级在弹性扣件地段比在普通扣件地段大,尖锐度、粗糙度在弹性扣件地段比在普通扣件地段小,抖动度则变化较小;弹性扣件对贯通道中央、车厢端部噪声的声压级、响度、语言干扰级影响较大,对上述位置噪声的尖锐度、抖动度、粗糙度和烦扰度、以及车体中部、司机室内部噪声的声压级和声品质客观评价参数影响都较小。
In order to analyze the influence of the elastic fasteners on the sound quality of vehicle’s interior noise,the vehicle interior noises in different positions are tested in the elastic fastener sections and the general fastener sections at different speeds of trains,and evaluated by different objective evaluation parameters of sound quality.Then,the vehicle interior sound qualities in the elastic fastener sections and the general fastener sections are mutually compared and analyzed.The results show that when the speed is less than 40 km/ h,the low and mid frequency interior noise holds the dominant position and should be the focus of the vehicle interior noise reduction.The A-weighted sound pressure level,loudness,psychoacoustic annoyance and speech interference level of the vehicle’s interior noise in the elastic fastener section are higher than those in the general fastener section,while the sharpness and roughness in the elastic fastener section are lower than those in the general fastener section.There is little difference of the fluctuation intensity in the two sections.The elastic fastener has great influence on the sound pressure level,loudness,and speech interference level of the noise at the junction and the ends of the carriage,while it has little influence on the sharpness,fluctuation intensity,roughness and psychoacoustic annoyance of the noise at the above positions.And the elastic fastener has little influence on the objective evaluation parameters of the sound quality in the driver’s cab and at the middle of the car body.
作者
谢蓥松
李莉
鞠龙华
王安斌
XIE Yingsong;LI Li;JU Longhua;WANG Anbin(School of Urban Rail Transit,Shanghai University of Engineering Science,Shanghai 201620,China;Railway and Urban Rail Transit Institute,Tongji University,Shanghai 201804,China)
出处
《噪声与振动控制》
CSCD
2019年第3期107-112,共6页
Noise and Vibration Control
基金
上海市科学技术委员会科研计划资助项目(1730501100)
关键词
声学
弹性扣件
普通扣件
车内噪声
声品质
客观评价参数
acoustics
elastic rail fastener
general rail fastener
interior noise
sound quality
objective evaluation parameters
