结构细节多裂纹扩展分析的新方法──变量优化法

A VARIABLE OPTIMIZATION METHOD A NEW TECHNIQUE FOR MULTICRACK GROWTH ANALYSIS IN STRUCTURE DETAILS

以确定性疲劳裂纹扩展分析为基础，推出了一种多裂纹扩展分析的新方法———变量优化法．给出了两种典型结构细节多裂纹扩展分析结果，结果表明：变量优化法比工程试凑法更有效，精度更高，比解非线性方程组法更符合工程实际。

A new technic variable optimization method is developed for multicrack growth analysis based on determinate fatigue crack growth. The multicrack growth analysis results for two typical structure details are given by using the new technic. The results show that the variable optimization method is more effective, more accurate, more agreeable to true problems and easier than the engineering methods of approximately solving nonlinear equations.