Study on Similarity of Modal Characteristic Between Reduced-scale Track and Full-scale Track
To fill the theoretical gap in establishing a reduced-scale test platform for dual track vehicles,this paper established full-scale and 1∶4 reduced-scale track vibration models under no-load and wheel-rail coupling conditions.Numerical simulations were used to study the vertical and lateral vibration modal characteristics and similarities of rails under no-load and wheel-rail coupling conditions,and theoretical calculations were used for verification.The results show that under no-load conditions and wheel-rail coupling conditions,the modal vibration mode and frequencies of the reduced-scale model and the full-scale model rails are similar.Under no-load conditions,for both the 1∶4 reduced-scale model and the full-scale model,the vertical and horizontal first-order vibration mode of the rail are first-order bending deformation,and the second-order vibration mode are pin-pin vibration.The first-order frequency of the reduced-scale model is about 8 times that of the full-scale model,and the second-order frequency is about 4 times that of the full-scale model.Under the condition of wheel-rail coupling,the first four-order modal vibration mode of the reduced-scale model and the full-scale model of the rail are consistent,both exhibiting the 1st to 4th order bending deformation inside the bogie.The 1st to 4th order frequencies of the reduced-scale model are approximately four times those of the full-scale model.
万方数据
维普
