• CN:11-2187/TH
  • ISSN:0577-6686

›› 2006, Vol. 42 ›› Issue (1): 86-89.

• 论文 • 上一篇    下一篇

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疲劳裂纹三维动态扩展灰色系统预测

江龙平;徐可君   

  1. 海军航空工程学院青岛分院航空机械系
  • 发布日期:2006-01-15

PREDICTION FOR THREE-DIMENSION FATIGUE CRACK DYNAMIC GROWTH BY GRAY SYSTEM PREDICTION MODEL

JIANG Longping;XU Kejun   

  1. Aviation Mechanism Department, Qingdao Branch of Navy Aviation Engineering Institute
  • Published:2006-01-15

摘要: 基于系统的观点和腐蚀深度、高载系数和载荷循环等外界因素对疲劳裂纹扩展的影响分析,应用灰色系统预测模型对疲劳裂纹的三维扩展进行动态预测和影响因素分析,建立了疲劳裂纹三维动态扩展灰色模型和灰色残差模型,对某试件疲劳裂纹三维动态扩展进行了拟合和预测,表明灰色系统模型具有较好的拟合度和较高的预测精度。

关键词: 灰色系统预测, 疲劳裂纹扩展, 三维效应, 预测方法

Abstract: Based on the viewpoint of system and the effect analysis of exterior factor on fatigue crack growth such as corrosion depth, high-load coefficient, loading cycle, and so on, the grey system prediction model is established and applied to the dynamic prediction for three-dimension growth of fatigue crack and the effect factor analysis. The grey model and residual difference model to the dynamic prediction for three-dimension growth of fatigue crack are presented and applied to match and predict some certain testpieces’ three-dimension dynamic growth of fatigue crack. The result shows that the model matches well and the prediction precision is high.

Key words: Fatigue crack growth, Grey system prediction, Prediction method, Three-dimension effect

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