中南大学学报（自然科学版）2024，Vol.55Issue(5)：1953-1965,13.DOI:10.11817/j.issn.1672-7207.2024.05.026
高速列车齿轮箱箱体动态疲劳寿命评估方法
Dynamic fatigue life assessment method for high-speed train gearbox housing
摘要
Abstract
As the train's speed increases,the frequency range and energy of the wheel-rail excitation load rapidly escalate,leading to a pronounced elastic vibration response in the gearbox housing.This excitation load exacerbates the fatigue failure within the gearbox housing.To assess the dynamic fatigue life of the gearbox housing in the service environment,first,based on the modal superposition method,a fatigue life assessment method considering the dynamic characteristics of the gearbox housing was established,which can obtain the contribution of the single-order modal of the gearbox housing to the fatigue life.Subsequently,a model of the high-speed train gear transmission system was established,and the service vibration environment of the gearbox was simulated by applying the measured wheel vibration acceleration of the test line through the virtual exciter.Finally,the fatigue life of the gearbox housing was evaluated using the quasi-static superposition method and the modal superposition method,respectively.The results show that the results of the bench model are consistent with the waveform and main frequency characteristics of dynamic stress measured by the test line,and the relative error of stress is within 10%,which verifies the accuracy of the model.The fatigue life of the housing is greatly affected by the model in high frequency wheel-rail excitation environment,and the quasi-static superposition method cannot accurately reflect the fatigue life of the housing dangerous points such as the hanging ear root,and there are some key modals which affect the housing fatigue life significantly.These findings serve as a foundation for enhancing the fatigue performance of the train gearbox housing through dynamic design methods.关键词
高速列车/齿轮箱箱体/台架模型/动态疲劳寿命Key words
high-speed train/gearbox housing/bench model/dynamic fatigue life分类
交通工程引用本文复制引用
豆硕,刘鹏飞,刘志明,王文静..高速列车齿轮箱箱体动态疲劳寿命评估方法[J].中南大学学报（自然科学版）,2024,55(5):1953-1965,13.基金项目
国家重点研发计划项目(2022YFB3402904) （2022YFB3402904）
国家自然科学基金资助项目(52072249) （52072249）
河北省教育厅青年科学基金资助项目(QN2024002)(Project(2022YFB3402904)supported by National Key Research and Development Program of China （QN2024002）
Project(52072249)supported by the National Natural Science Foundation of China （52072249）
Project(QN2024002)supported by the Youth Science Fund of the Education Department of Hebei Province) （QN2024002）
