【摘要】 为探究轮轨高频激励对转向架构架振动损伤的影响并提高频域法损伤计算精度，开展不同轮轨激励频率和幅值下转向架构架振动台架试验，分析不同激励工况下构架敏感区域及激励频率和幅值对构架应力的影响；针对应力信号的非高斯性，对计算构架损伤的频域修正法进行优化，并与时域法、传统频域法、频域修正法进行对比验证；基于优化频域修正法，研究不同激励工况对构架损伤的影响。结果表明：列车运行中时常出现的523,578和670 Hz轮轨高频激励频率与构架固有频率接近，使构架应力响应强烈，强响应激励频率下构架端部区、转臂定位座区、制动吊座区和垂向减振器座区的应力均方根值较非强响应激励频率下的最大增幅分别为6.9,2.6,6.5和10.6倍，每万km等效损伤最大增幅分别为987,109,653和1 139倍；强响应激励频率下，0.200 mm激励幅值时构架应力均方根值较0.075 mm时平均增幅约为0.5倍，等效损伤平均增幅约为3倍；提出的优化频域修正法，能将频域法的损伤计算最大误差降低至10%以下，并使构架损伤评估更加保守。研究结果可为高速列车转向架构架抗振动疲劳设计提供参考和数据支撑。更多还原

【Abstract】 To investigate the impact of high frequency wheel-rail excitation on vibration-induced damage of bogie frames and improve the accuracy of frequency-domain damage calculations, vibration bench tests of bogie frames under different wheel-rail excitation frequencies and amplitudes were conducted. Critical regions of the bogie frame and the effect from excitation frequencies and amplitudes on the stresses under different excitation conditions were analyzed. In response to the non-Gaussian characteristics of stress signals, the frequencydomain correction method for frame damage calculation was optimized and validated through comparative studies with time-domain methods, conventional frequency-domain methods, and existing frequency-domain correction methods. Based on the optimized frequency-domain correction method, the impact of different excitation conditions on frame damage was systematically investigated. The results reveal that the highfrequency wheel-rail excitation frequencies of 523, 578, and 670 Hz, frequently encountered during train operation, closely align with the natural frequencies of the frame, inducing significant stress responses. At these strong-response excitation frequencies, the root mean square(RMS) values of stress in critical regions which called the frame end zone, arm positioning seat area, brake hanger area, and vertical damper seat area, exhibit maximum increases of 6. 9, 2. 6, 6. 5, and 10. 6 times, respectively, compared to non-resonant conditions.Correspondingly, the equivalent damage per 10, 000 kilometers amplifies by factors of 987, 109, 653, and 1,139. At strong-response excitation frequencies, increasing the excitation amplitude from 0. 075 mm to 0. 200 mm resulted in an average increase of approximately 0. 5 times in RMS stress and about 3 times in equivalent damage. The proposed optimized frequency-domain correction method reduces the maximum error in frequencydomain damage calculations to below 10% and ensures a more conservative damage assessment for the frame.These findings offer valuable references and data support for the anti-vibration fatigue design of high-speed train bogie frames.更多还原