Abstract
Taking the head car body of the stainless steel subway as an example, the static strength of the vehicle body and the shear strength of the welding spot is checked according to different thicknesses and weld nugget diameters under dangerous conditions. For the unqualified position of the welding spot strength, the welding spot layout schemes are improved. At the same time, the topology optimization is performed for the main welding spot layout areas in the scheme improvement. The optimization results show that the number of welding spots is reduced by 49.33% and 52.04% compared with the original scheme and the improvement scheme respectively under the premise of ensuring the structural strength. The obvious optimization effect provides a useful reference for the future design of stainless steel spot welding subway vehicles.
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