Open AccessStudy on fatigue of subway antenna beam
Author(s) -
Zhou Yeming,
Chuandong Cai,
Yongzhi Jiang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/780/6/062044
Subject(s) - bogie , structural engineering , beam (structure) , vibration , finite element method , modal , modal analysis , antenna (radio) , vibration fatigue , coupling (piping) , engineering , dynamic stress , acoustics , materials science , mechanical engineering , physics , electrical engineering , polymer chemistry
The dynamic fatigue life theory starts very late. As an important part of the subway, the antenna beam has played a great important role on the daily life of people. To study the fatigue properties of it, the relative researches are carried out. The finite element model is set up first. Then the mode analysis is carried out. After that, the rigid-flexible coupling dynamic model is set up. Finally, the reduction analysis continued. Through the experiment and simulation, the fatigue strength and vibration transition properties are analysed. Ploymax method is carried out for modal parameter identification, then the FE model could be verified to improve the accuracy. By setting up the rigid-flexible coupling dynamic model of the subway vehicle, then the modal parameters and experimental data are compared, the model is modified and verified. Considering the impact of wheel flat scar and rail gap, the vibration transmission characteristics of bogie system are studied. In the calculation of resonance fatigue dynamic stress, FFT method is used to solve the problem. The fatigue strength of antenna beam caused by the impact of rail gap and wheel flat scar is studied, and the requirements for safe service life of antenna beam is put forward.