Abstract

Using adaptive grid algorithm method, framework and its weld seam are meshed by manual method, fillet is instead of the corner of weld seam and the needed finite element model of a bogie framework and weld-seam are built. Based on the miner theory of cumulative fatigue damage and S-N curve modified, the strength and fatigue life distribution contours for welding seam of the bogie framework are given; the results are basically consistent with that of the experiment, so the framework satisfies with the demand of strength and fatigue life. The thesis predicts weak location of weld seam and provides basis to practical production.

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