Abstract
Gearbox housing in high-speed trains has two kinds of excitation sources: the internal excitation of gear mesh excitation and the external excitation that contains the wheel polygonization and the input torque. To study the effect of the torque on the vibration and stress of the gearbox housing, a multibody dynamic model is established by the Simpack, in which the elastic deformation of the wheelset and the gearbox housing are considered. A traction drive system is modeled by the MATLAB/Simulink to calculate the traction torque, which is transformed to drive the high-speed train to overcome the basic resistance and run with a constant speed. The accuracy of the model is verified by comparing the simulation results with the measurement results. Based on the electromechanical model, the vibration acceleration of the gearbox housing in the case of without torque, with ideal torque, and with harmonic torque is calculated and analyzed, as well as its dynamic stress. The results show that the traction torque plays a role in amplifying the vibration acceleration and dynamic stress. When the fatigue damage of the gearbox housing is calculated, it will obtain a more accurate result to consider the effect of the traction torque.
Highlights
Research on vibration and structural fatigue of vehicle components is an essential issue in the field of mechanical engineering, affecting the comfort and safety of vehicle operation [1], [2]
As the published literature shows, there are many kinds of research that focus on the vibration characteristics of the gearbox, and lots of literature [10], [11] concentrate on the influence of wheel-rail excitation on the gearbox housing, such as wheel polygonization [12], [13], which often occurs during the operation of high-speed trains
By taking the root mean square (RMS) value of the vertical vibration acceleration of the gearbox housing, relationships between the RMS values and the amplitude of the wheel polygonization in the two operating conditions are shown in Fig. 8 respectively
Summary
Research on vibration and structural fatigue of vehicle components is an essential issue in the field of mechanical engineering, affecting the comfort and safety of vehicle operation [1], [2]. H. Wu et al.: Research on Vibration Characteristics and Stress Analysis of Gearbox Housing in High-Speed Trains. As the published literature shows, there are many kinds of research that focus on the vibration characteristics of the gearbox, and lots of literature [10], [11] concentrate on the influence of wheel-rail excitation on the gearbox housing, such as wheel polygonization [12], [13], which often occurs during the operation of high-speed trains. The gearbox housing on high-speed trains is taken as the main object to study its dynamic vibration characteristics and dynamic stress in the condition of wheel polygonization and traction torque. The 20th polygonal wear of wheel as shown in Figure 3 is considered in the calculation, which will causes the 578 Hz excitation resonance the gearbox housing based on the structure used in this paper. The voltage equation of asynchronous traction motor in the two-phase stationary coordinate system is calculated usα Rs + Lsp 0
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
