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Abstract：
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This paper focuses on the optimization of the preform die shapes through controlling forging geometry by using rigid plastic finite element method,sensitivity analysis and engineering optimization algorithm When lower die velocity equals to zero, the sensitivity boundary conditions also equal to zero and preform die shape keeps constantly in optimization iteration In order to overcome the above limitation,a method dealing with sensitivity boundary conditions is put forward For the problem that the program running takes much longer time,the paper presents a method of storing sensitivity stiff matrices and reducing optimization design variables The program running time is greatly decreased using the method Finally, the reliability of the methods is demonstrated by one optimization design example
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Funds：
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霍英东教育基金会高等院校青年教师基金资助项目 ;;
山东省优秀中青年科学家科研奖励基金资助项目
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AuthorIntro：
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Reference：
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