Strength test analysis of intercity locomotive frame

Abstract The intercity locomotive bogie is a crucial transportation infrastructure component, with the frame serving as a vital load-bearing element. Its mechanical properties significantly influence the support of the car body and ensure the stable operation of locomotive vehicles. To enhance the fatigue reliability of the bogie frame and provide relevant data, this study focuses on analyzing the frame’s strength in both the design and manufacturing stages, based on the bogie of a specific intercity locomotive. The investigation follows the EN13749 and UIC615-4 standards to assess the static and fatigue strength of the frame. First, the static strength of the frame was tested under the corresponding loads. Next, the fatigue strength was evaluated after subjecting the frame to several fatigue cycles. The test results indicated that the frame’s static strength met the specified requirements. Fatigue strength was assessed by using a simulated operating environment, with stress amplitudes at each measurement point falling within the material’s fatigue limit, as outlined by the Goodman diagram. Following 10 million load cycles, no cracks were detected during non-destructive testing, confirming that the frame passed the fatigue test.