摘要
基于离散短时傅里叶变换(DSTFT)思想提出了一种新的CWR稳定性分析方法,该方法利用DSTFT算法对线路纵向各采样点处测得的应力进行计算,并绘制各采样点处应力的幅度和频率在线路纵向上的三维分布图谱。通过对图谱的研究,建立了CWR稳定性评估条件,实现了对CWR稳定性的定量分析。经过对北京丰台区某CWR的多次试验,结果证明该方法的分析结论准确可靠。
On the basis of the Discrete Short Time Fourier Transform （DSTFT） thoughts, a new method has been proposed to analyze the stability of continuous welded rail （CWR）. In this approach, the DSTFT algorithm is utilized to calculate the stress that is measured at each sampling point in longi- tudinal direction of rail Then the three-dimensional distribution maps of amplitude and frequency of stress for each sampling point of rail are plotted. And through the study of distribution maps, the sta- bility evaluation condition of CWR is derived to quantitatively analyze the stability of CWR. The results prove that the method is accurate and reliable after much experimentation conducted to CWRs located at Fengtai District in Beijing.
出处
《石家庄铁道大学学报（自然科学版）》
2017年第1期46-51,共6页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
基金
国家自然科学基金(51275029)
关键词
无缝线路
离散短时傅里叶变换
稳定性评估
无损检测
continuous welded rail
the discrete short time fourier transform
stability assessment
non-destructive testing
