Abstract: In order to improve the sub-soiling coefficient and decrease the cost,a forced-vibration subsoiler which applied a crank shaft to implement vibration was design.The effect of forced-vibration on reducing traction resistance at different tillage depth and velocity conditions was explored,and the results showed that the traction resistance was reduced by 19.28 % at vibration treatment compared with non-vibration treatment,and the effect of reducing traction resistance was more obvious as the tillage depth increase.These results provided a basis for reducing traction resistance at vibration treatment,optimizing machinery structure and improving the economy of whole machine.

Key words: sub-soiling, drag reduction, vibration