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- 2018
轨道踏面损伤弦测响应研究
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Abstract:
根据轨道踏面上各种损伤的特征,分析对应的弦测响应及相互影响。在采样率足够的前提下,各损伤在弦测后特征依然保持,但数量、幅度和位置可能发生变化;对包含损伤信息的弦测值逆滤波得到的波磨复原结果将与原始值有所偏差。基于此,提出以小波系数和为依据的钢轨踏面损伤辨识和轨道弦测数据分段逆滤波方法。研究结果表明:小波系数和能够提示各种损伤位置和分布;以此为依据对轨道弦测数据进行分段处理能得到与真实情况较为符合的结果,适合工程应用。
After analyzing the chord measurement of different track surface defects, it is found that the defects will remain the same, but their quantity, amplitude and position may change. It is also known through the analysis that the restore value acquired by inverse filtering chord measurement value is different from the original value. Based on these, a new approach according to wavelet coefficient sum at different locations was proposed, in order to identify track surface and get highly accurate result. Theoretical simulation and test results show that this method is able to achieve the target, and the utilization of segmented data inverse filtering can help to get better result. Thus, it is suitable for engineering application