| The shape of plow surface determinates its working performance which is the hack and turn ability. So by deep study on the influencing factors on working performance which are the traction resistance and turn performance of the surface, the influencing principle can be found, which has an important significance and practical values for the design of plow surface.Firstly, in the study using mathematic software MathCAD, the mathematic model of turn plow surface was established. Also, a simulative model of explicit dynamic analysis for plow surface and soil system was established by ANSYS/LS-DYNA, and the physical test has verified it. Secondly, a simulative experiment has been made, and after constituting the criterion standard of turn performance, by analyzing the data, the regression mathematic models between factors, which includes ratio of height and opening of oriented curve, tangent angle, cutting angle, tillage velocity, the maxi-blade angle and the mini-blade angle, and the targets which includes traction resistance and turn performance, are been made respectively. What's more, the principle of the factors and their interactions influencing to the targets was analyzed. Besides, by the preliminary discussing of the mechanism of the factors and their interactions influencing to the targets, the conclusion is the bigger tangent angle is benefit for reducing the traction resistance and enhancing turn performance. Finally, under the bigger tangent angle, the respective optimization was done. At the same time, the comprehensively optimized factors combination is gotten, which is the ratio of height and opening of oriented curve is 1.64, cutting angle is 24.85°, tillage velocity is 1.65m/s, the maxi-blade angle is 50.48°, and the mini-blade angle is 32.79°. Under the combination of comprehensive optimization factors, the traction resistance is 4.40kN, and the turn performance data reaches 8.0.
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