中南大学学报（自然科学版）2025，Vol.56Issue(5)：2108-2120,13.DOI:10.11817/j.issn.1672-7207.2025.05.035
不同行车条件下高速车辆通过道岔动力学响应时频特征分析
Time-frequency analysis of high-speed vehicles passing turnout at different operating conditions
摘要
Abstract
To investigate the influence of turnout structure irregularities on the dynamic response characteristics of vehicles passing through turnouts under different conditions such as different types of vehicles,directions,and speeds,the flexible deformation of rail in the turnout area was considered.Taking the high-speed railway No.18 unballasted turnout as the research object,a coupled dynamics model of vehicle-turnout rigid-flexible coupling was established.To accurately obtain the distribution characteristics of signals,synchrosqueezed wavelet transform technology was utilized to conduct time-domain and frequency-domain analyses of vehicle dynamic responses with different vehicles,turnout directions,and travel speeds.The results show that in different passing directions,the wheel load transition position is closer to the tip of the point rail,and the wheel load transition length is longer in the direct forward direction than that in the direct reverse direction.Two main vibration frequency bands below 150 Hz are identified in both the wheel-rail vertical force and axle box vertical vibration acceleration.These two main frequencies are measured to be approximately 10 Hz higher in the direct reverse direction than that in the direct forward direction.Different time-frequency characteristics are exhibited by various vehicle models.Compared with CRH2A and CRH380A,the wheel load transition position of CRH5 is significantly moved forward,with higher amplitudes and peak values of wheel-rail vertical force and axle box vertical vibration acceleration,along with higher vibration main frequency energy.When different vehicles are excited by the same structural irregularity,two main vibration frequency components below 150 Hz are primarily in the wheel-rail vertical force and axle box vertical vibration acceleration.Due to differences in vehicle parameters,variations in these two main frequencies and other frequency components above 400 Hz are noted.关键词
固有结构不平顺/高速道岔/时频分析/轮轨动态相互作用Key words
inherent structural irregularities/high-speed turnout/time-frequency analysis/wheel-rail dynamic interaction分类
交通工程引用本文复制引用
李天怡,闫正,朱小雪,徐井芒,王平,郑世杰..不同行车条件下高速车辆通过道岔动力学响应时频特征分析[J].中南大学学报（自然科学版）,2025,56(5):2108-2120,13.基金项目
国家自然科学基金资助项目(52108418,52278464,52122810) （52108418,52278464,52122810）
国家重点研发计划项目(2023YFB2603702)(Projects(52108418,52278464,52122810)supported by the National Natural Science Foundation of China （2023YFB2603702）
Project(2023YFB2603702)supported by the National Key Research and Development Program of China) （2023YFB2603702）
