Influence of Turnout Excitation on EMU Carbody Flexible Vibration
In order to analyze the flexible vibration of the EMU carbody after it had passed through the turnout region,a high-speed EMU(Electric Multiple Units)dynamic model considering carbody flexibility and a turnout excitation were constructed.The vibration response characteristics of the model under the excitation of turnout was analyzed and the carbody shaking phenomenon was simulated.The results were compared with field test results.On this basis,the influences of passing speed,turnout excitation and the turnout spacing on the abnormal elastic vibration of the carbody were studied.The results show that turnout excitation can lead to the first-order diagonal distortion mode coupling resonance of the carbody.The abnormal vibration of the carbody is significantly influenced by the vehicle's running speed.At 300 km/h speed,a clear flexible vibration of the carbody appears.The lateral vibration of the carbody will be amplified by the excitation of a continuous turnout.There is a nonlinear relation between lateral vibration acceleration of the carbody and the turnout spacing.The flexible vibration of the carbody gets worse between 50 meters and 80 meters of the turnout spacing.The outcomes may serve as a theoretical reference for developing efficient vibration control strategies for flexible carbodies.
vibration and wavehigh-speed EMUturnout impactcarbody flexible resonanceinfluence factors
万方数据
维普
