Subway bogie is a key infrastructure. The frame is an important bearing part of the subway bogie, and its mechanical properties have a wide impact on supporting the car body and ensuring the stable operation of subway vehicles. In order to further improve the fatigue reliability of the bogie frame to provide data support, the article is based on the bogie of a certain subway vehicle, analysis of its frame in the design and manufacture of the strength of the reliability of the bogie frame according to the EN13749 and UIC615-4 standard bogie frame static strength and fatigue strength test. First of all, through the examination of the static strength of the frame in the corresponding load, and then analyze the fatigue strength under a certain number of fatigue cycles. According to the analysis of the test results, the static strength of the frame meets the test requirements, and the fatigue strength is assessed based on the results of the static strength test conducted by simulating the operating conditions, and the stress amplitude at each measurement point is within the envelope of the fatigue limit Goodman diagram of the material, which meets the fatigue strength requirements. After 10 million cycles of loading, no cracks were found in the non-destructive flaw inspection, and the fatigue test of the frame was qualified.
With the aim of railway vehicles for light weight and energy saving, CRRC Nanjing Puzhen Co. developed a new type of vehicle incorporating the bogie suspended gearless Permanent Magnetic Synchronous Motor (PMSM). To realize the safety and long-term wheel-rail force monitoring for the vehicle, a non-destructive IWS was proposed. The nondestructive IWS consists of an optimized strain gauge scheme to minimalize the crosstalk of each direction of wheel-rail force and the influence of contact point position, a bridging scheme to demodulate the continues wheel-rail force from the periodic rotated wheel, and a telemetry system to wireless transmit the signal to the data acquire system from the rotated wheelset. The proposed novel IWS was involved in the dynamic performance evaluation test, and the evaluation results shows that the vehicle fulfils the ride comfort and safety against derailment requirements of GB/T 5599-2019. The change of sprung or unsprung mass and bogie frame structure did not influence the dynamic behaviour of vehicle a lot.
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