Zhang Fubing, Wang Hao, Zeng Qihang, Wu Pingbo, Pan Meiling
School of Intelligent Manufacturing Engineering, Chongqing University of Arts and Sciences, Chongqing, China.
Southwest Jiaotong University, Chengdu, Sichuan, China.
Sci Rep. 2025 Apr 29;15(1):15044. doi: 10.1038/s41598-025-96212-2.
This article introduces a groundbreaking approach for accurately gauging high-frequency wheel-rail forces, taking into account the impact of wheelset vibration modes on measurement outcomes. The method relies on lateral and vertical acceleration data from the left and right axle box positions, combined with a finite element model, to determine the system's frequency response function. Subsequently, it inverts the lateral and vertical wheel rail forces of both wheels. In terms of data processing, we employed the Fourier transform method, abandoning the traditional conversion to power spectral density functions. This improvement ensures that the phase information of the data is preserved, significantly enhancing the reliability of the results. To validate the reliability and accuracy of this method, a comparative study was conducted by establishing a model. Specifically, we conducted in-depth discussions on high-frequency wheel rail forces around 580 Hz. The comparison outcomes indicate a close correlation between the results obtained from SIMPACK's direct simulation (5.7kN) and the inverse method (5.2kN). These findings robustly support the theoretical accuracy and practical feasibility of this method.
本文介绍了一种开创性的方法，用于精确测量高频轮轨力，该方法考虑了轮对振动模式对测量结果的影响。该方法依赖于左右轴箱位置的横向和垂直加速度数据，并结合有限元模型来确定系统的频率响应函数。随后，它对两个车轮的横向和垂直轮轨力进行反演。在数据处理方面，我们采用了傅里叶变换方法，摒弃了传统的转换为功率谱密度函数的做法。这一改进确保了数据的相位信息得以保留，显著提高了结果的可靠性。为了验证该方法的可靠性和准确性，通过建立模型进行了对比研究。具体而言，我们对580Hz左右的高频轮轨力进行了深入讨论。比较结果表明，SIMPACK直接模拟得到的结果（5.7kN）与反演方法得到的结果（5.2kN）之间具有密切的相关性。这些发现有力地支持了该方法的理论准确性和实际可行性。
