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基于波噪比的高速铁路钢轨波磨快速检测方法

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为实现高速铁路钢轨波磨里程覆盖式、高频次、快速测量,提出基于波噪比的钢轨波磨快速检测方法.采用便携式添乘仪检测高速列车车体振动和车内噪声数据,提出基于车体纵向加速度进行数值积分来计算列车速度和里程,采用曲线地段车体摇头角速度里程与台账里程的偏差值修正速度积分误差.利用提取的里程修正后车厢噪声数据与钢轨波磨对应的400~700 Hz频带成分,计算频带能量占噪声总能量的比值,并获取波噪比超限时的钢轨波磨波长和里程.结合高速列车实测数据分析,研究结果表明:速度修正后列车定位里程最大误差为87 m,对波磨比大于0.3的线路区段进行钢轨波磨波形测量和轴箱加速度振动能量比分析,钢轨波磨波长范围为53~57 mm,实测波长为53 mm,验证了该方法的正确性,为高速铁路钢轨波磨的快速测量提供技术支撑.
Rapid Detection Method for Rail Corrugation in High-speed Railways Based on Corrugation-noise Ratio
To achieve full coverage,high-frequency,and rapid measurement of rail corrugation in high-speed railways,a fast detection method was proposed for rail corrugation based on corrugation-noise ratio.A portable ride recorder was used to detect the vehicle vibration and noise data of high-speed trains,and perform numerical integration on the longitu-dinal acceleration of the vehicle body to preliminarily calculate the train speed and mileage.The deviation value was used between the angular velocity mileage of the body shaking in curved sections and the ledger mileage to correct the speed integration error.Based on the extracted carriage noise data after mileage correction and the 400~700 Hz frequency band components corresponding to rail corrugation,the ratio of frequency band energy to total noise energy was calculated to obtain the rail corrugation wavelength and mileage when the corrugation-noise ratio exceeded the limit.Based on the a-nalysis of measured data of high-speed trains,the research results show that the maximum error in train positioning mile-age after speed correction is 87 m.According to the measurement of rail corrugation waveform and analysis of axle box acceleration vibration energy ratio carried out on the line sections with a corrugation ratio exceeding 0.3,the wavelength range of rail corrugation is 53~57 mm,while the measured wavelength on site is 53 mm.This method has been verified to provide technical support for the rapid measurement of rail corrugation in high-speed railways.

rail corrugationcorrugation-noise ratiospeed estimationmileage positioningvibration energy ratio

张航、卢春房、高亮

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北京交通大学土木建筑工程学院,北京 100044

国家铁路局规划与标准研究院科研处,北京 100055

中国铁道学会,北京 100844

钢轨波磨 波噪比 速度估计 里程定位 振动能量比

中国国家铁路集团有限公司科技研发计划

P2021T013

2024

铁道学报
中国铁道学会

铁道学报

CSTPCD北大核心
影响因子:0.9
ISSN:1001-8360
年,卷(期):2024.46(4)
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