疲劳裂纹系统的参数域分析对于建立系统的理论模型具有一定的指导意义 .从非线性动力学角度对 Brown图进行了再分析 ,经验性地给出了疲劳裂纹系统演化的参数域 .定性分析了各区域裂纹的演化行为 ,当系统的参数满足 II区条件时 ,行为较为复杂 ,此时系统可能对材料的微结构、外界扰动具有强烈的敏感性 ,造成疲劳裂纹演化结果的分散性 . The parameter analysis of fatigue crack system is of guiding significance for the establishment of the theoretical model of the system.From the perspective of nonlinear dynamics, the Brown plots are reanalyzed and the parameter domain of fatigue crack evolution is given empirically.The qualitative analysis The evolution behavior of the crack in each region shows that when the parameters of the system satisfy the condition of region II, the behavior is more complicated. At this time, the system may have strong sensitivity to the microstructure and external disturbances of the material, resulting in the dispersibility of the evolution of the fatigue crack.