噪声与振动控制2012，Vol.32Issue(3)：78-81,4.DOI:10.3969/j.issn.1006-1355.2012.03.018
无砟轨道钢轨导纳特性的实验研究
Experimental Study on Admittance Performance of Rails in Ballastless Railroad
摘要
Abstract
In order to study the vibration characteristics of rails in ballastless railroad, a P60 typical rail with unit length was tested with the impulse hammering excitation method. The force and acceleration responses of the rail were measured, and the frequency response was obtained by analyzing the rail admittance using DASP software. The frequency response graph of acceleration admittance was plotted. The vibration characteristics below 10000Hz frequency of the rail-top, the rail head side and the rail waist at the midpoint of the rail-specimen were given. The results show that the vibration response of the rail- waist at the midpoint of the rail specimen decreases gradually when the location of excitation translates from the midpoint to both ends of the rail. Since track admittance analysis is the basis of noise analysis, and is helpful for detecting the location and mechanism of noise sources, these results may provide the experimental data for theoretical analysis of the high-frequency admittance performance of the rail in ballastless railroads and the determination of the frequency-range for noise reduction and the location of the noise sources.关键词
振动与波/钢轨/导纳/频谱分析Key words
vibration and wave / rail/ admittance / spectrum analysis分类
交通工程引用本文复制引用
刘震,刘林芽..无砟轨道钢轨导纳特性的实验研究[J].噪声与振动控制,2012,32(3):78-81,4.基金项目
项目基金:国家自然科学基金(51068007) （51068007）
教育部新世纪优秀人才支持计划(NECT-09-0167) （NECT-09-0167）
