论文部分内容阅读
目的:研究高速列车在不同速度(260~385 km/h)、无砟和有砟轨道以及明线和隧道运行时的车内噪声特性,为高速列车车内减振降噪和车体低噪声设计提供科学依据。创新点:系统分析高速列车在不同运行条件下的车内噪声总值变化、空间分布、频谱特性和声源贡献,掌握车内噪声随列车运行速度的变化规律、轨道型式和隧道混响对车内噪声的影响,研究轮轨噪声、气动噪声和弓网噪声对车内噪声的作用。方法:1.根据不同的列车运行速度,分析车内噪声的变化规律;通过进一步对比头尾车运行时,不同测点位置的噪声总值、显著频率和声源贡献,研究气动作用对车内噪声的影响。2.针对不同轨道型式,分析车内噪声的差异特性;通过进一步对比不同速度下的前、后转向架上方车内噪声测点(其中一个还位于受电弓下方)的噪声总值、显著频率和声源贡献,研究有砟和无砟轨道、弓网噪声对车内噪声的影响以及速度因素的作用。3.对于隧道运行,分析不同速度下在明线和隧道运行时的车内噪声总值和显著频率,研究隧道混响对车内噪声的影响以及速度因素的作用。结论:1.TC01车无论作为头车或尾车运行,车内观光区的噪声均主要受气动作用影响。2.随着列车运行速度的提高,轨道型式的不同对车内噪声的影响有所降低。3.隧道混响对中间车的影响要高于头车。
OBJECTIVE: To study the noise characteristics of high-speed trains at different speeds (260 ~ 385 km / h), ballastless and ballasted tracks, as well as light-line and tunnel operation, Provide a scientific basis. Innovative point: System analysis of high-speed train under different operating conditions of the total noise changes in the car, spatial distribution, spectral characteristics and contribution to the sound source, to grasp the train noise with the train speed changes, the track type and tunnel reverberation The impact of internal noise, wheel and rail noise, aerodynamic noise and bow noise on the role of the car noise. Based on the different train running speed, the change law of the noise in the train is analyzed. By comparing the total noise, the significant frequency and the contribution of the sound source at different measuring points when the head-tail truck runs, The impact of noise. 2.According to the different orbit types, analyzing the difference of the noise in the vehicle; comparing the total noise value of the noise measuring points (one of which is located below the pantograph) above the front and rear bogies at different speeds with different frequencies, And contribution of sound sources, the effects of the noise of bow and ballastless track on the noise inside the car and the speed factor are studied. For tunneling operation, the total noise and significant frequency of the car at different speeds in bright line and tunnel are analyzed to study the effect of tunnel reverberation on the noise in the vehicle and the effect of speed factor. Conclusion: 1.TC01 car whether as a head car or tail car operation, the car sightseeing area noise is mainly affected by the aerodynamic effect. 2. With the increase of train speed, the influence of different track types on the noise in the vehicle is reduced. 3. Tunnel reverberation on the middle of the car to be higher than the first car.