The results showed that the maximum DSIF decreased with increase of vehicle velocity,that the DSIF decreases by 21.6% when vehicle velocity changed from 40 km/h to 120 km/h.

• 结果表明；最大动应力强度因子随行驶速度的增加而减小；当行驶速度由40 km/h增加至120 km/h时；最大动应力强度因子减小了21.；6%25;