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航空学报  2013 

DFR法在结构疲劳优化设计中的应用

DOI: 10.7527/S1000-6893.2013.0201, PP. 1122-1128

Keywords: 有限元分析,疲劳可靠性,疲劳优化,细节疲劳额定值,集成,平台

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Abstract:

提出了基于有限元分析的细节疲劳额定值(DFR)疲劳可靠性分析方法,将有限元分析与疲劳分析进行关联,编写基于有限元分析的DFR法分析软件(FEM-DFR),对试验件进行疲劳寿命分析,与试验对比吻合较好,验证了方法的准确性。在此基础上,针对疲劳优化周期长和效率低的问题,开发了集成Patran/Nastran、FEM-DFR和iSIGHT的疲劳优化平台,在此平台上完成了某型飞机作动筒支座细节的优化,该平台数据传输流畅、操作效率高、优化质量好,具有一定的工程应用价值。

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