现代有轨电车不同轨道的振动传递特性试验研究

为探讨现代有轨电车不同轨道的振动传递特性,以某市现代有轨电车为例,对3种不同的轨道(未采取减振处理的普通轨道、安装弹性包覆材料的普通轨道和嵌入式轨道)进行测试.基于锤击试验原理,获取了钢轨振动衰减率、轨道各部件的频响特性和插入损失,并与其它减振轨道进行了比较.结果表明:嵌入式轨道的钢轨振动衰减率表现出明显的频率相关性,...

Experimentation on Vibration Transmission Characteristics of Modern Tram Tracks

In order to explore vibration transmission characteristics of different tracks in modern tram traffic (MTR), the MTR in a city was selected as the case, three different tracks were measured, i.e., ordinary track without vibration absorption elements, ordinary track with elastic cladding materials, and embedded track. Based on the principle of hammering test, the rail vibration decay rate, frequency response characteristic of each track component and insertion loss were obtained. The test results were compared with other anti-vibration tracks. Results show that the vibration decay rate of the embedded track exhibits frequency dependency, which has a maxima of 5.9 dB/m at 1600 Hz frequency-band. The first rail resonance point of the embedded track appears near 160 Hz, the amplitude of frequency response function and resonant frequency are both lower than that of the ordinary track without vibration absorption elements. Overall, compare to the ordinary track with elastic cladding materials and other anti-vibration tracks, the embedded track demonstrates better vibration reduction effect in longitudinal direction of rails in mid- and high-frequency range, and thus theoretically the wheel-rail noise can be well suppressed.