| 随机振动载荷作用下的结构疲劳寿命估算 |
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| 引用本文： | 董保童,施荣明,朱广荣.随机振动载荷作用下的结构疲劳寿命估算[J].飞机设计,2001(3):36-41. |
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| 作者姓名： | 董保童 施荣明 朱广荣 |
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| 作者单位： | 沈阳飞机设计研究所,沈阳,110035 |
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| 摘 要： | 介绍了随机过程功率谱密度(PSD)函数的特性,讨论了在各种不同随机振动载荷下应用有限元分析(FEA)获得的应力响应功率谱密度(PSD)函数寿命预测的公式,并设计出具有实际应用价值的、可用于飞机研制工作的结构疲劳寿命估算计算机程序(FORTRAN程序)。为说明寿命预测的实际过程,文中最后对某型号飞机减速板进行了结构疲劳寿命的估算。
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| 关 键 词： | 功率谱密度 寿命预测 有限元分析 |
| 修稿时间： | 2001年4月26日 |
STRUCTURAL FATIGUE LIFE PREDICTION UNDER RANDOM VIBRATION LOADINGS |
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| Dong Baotong,Shi Rongming,Zhu Guangrong.STRUCTURAL FATIGUE LIFE PREDICTION UNDER RANDOM VIBRATION LOADINGS[J].Aircraft Design,2001(3):36-41. |
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| Authors: | Dong Baotong Shi Rongming Zhu Guangrong |
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| Abstract: | This paper presents characteristics of the power spectral density ( PSD) function of random processes , discusses the life prediction formulas on the stress response power specify density function obtained from finite element analysis (FEA) under various random vibration loadings. The computer program (FORTRAN) is also worked out for structural fatigue life prediction which is practically applicable and can be used in aircraft design. In order to illustrate the practical procedure of life prediction, the structural fatigue life prediction on a reducing board, which is taken out from X type aircraft, is presented at the end of this paper. |
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| Keywords: | power spectral density life prediction finite element analysis |
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