双频激振下带V形缺口轴的疲劳寿命研究

化春键,李冬冬,蒋毅,俞建峰,陈莹

Study on fatigue life of shaft with V-notch under dual-frequency excitation

Chun-jian HUA,Dong-dong LI,Yi JIANG,Jian-feng YU,Ying CHEN

表3 疲劳寿命预测模型方差分析结果

Table 3 Variance analysis results of fatigue life prediction model

来源 平方和 自由度 均方差 F值 p值 R2=0.994 4， R2adj=0.987 3， Cv=1.88% 预测模型 207.61 9 23.07 138.9 <0.000 1 x1 4.81 1 4.81 28.93 0.001 x2 46.56 1 46.56 280.37 0.000 1 x3 101.53 1 101.53 611.37 <0.000 1 x1x2 1.82 1 1.82 10.97 0.012 9 x1x3 0.002 5 1 0.002 5 0.015 1 0.905 8 x2 x3 1.21 1 1.21 7.29 0.030 7 x12 15.6 1 15.6 93.95 <0.000 1 x22 12.17 1 12.17 73.27 <0.000 1 x32 26.32 1 26.32 158.46 <0.000 1 残差 1.16 7 0.166 1 失拟项 0.922 5 3 0.307 5 5.13 0.074 2 纯误差 0.24 4 0.06 总和 208.78 16