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Abstract：
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The bending forging process was studied for large-scale crankshafts.The results from the numerical computation were compared with those from an available document.Aiming at the typical defection produced by the bending forging process,an optimization program,i.e.,OPTIII,which was developed based on the constrained variational dimension method,was used to implement the shape optimization for the billet.Herein,ANSYS/LSDYNA was called as a subroutine.Finally,the experimental testing was carried out.The results between the simulation and the testing agreed very well.
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