Simulation of Furrowing and Ridging Blade in Strawberry Greenhouses and Optimization of the Working Parameters with the Response Surface Method
Strawberry planting requires the use of high ridge cultivation,in order to increase the quality of furrowing and ridging,the existing blades are generally improved by increasing the width of front part of the blade.Due to the lack of design basis for this improvement,the current strawberry greenhouse furrowing and ridging tools generally have problems of low working quality and large energy consumption.In order to study the blade design method which is suitable for furrowing operation in strawberry greenhouse,the numerical simulation model of soil throwing with the furrowing blade was established by using LS-DYNA software,the real-time field test device was set up to analyze and verify the simulation model.On this basis,Box-Behnken response surface analysis method was used to establish the quadratic regression model,in which the forward speed of the blade roller,the rotational speed of the blade shaft and the depth of furrowing and ridging are taken as input variables,and the torque of the blade roller,the proportion of residual particles are as the response values.By using the optimization module of the Design-Expert,the result shows that the forward speed of the machine is 0.38 m·s-1,the blade shaft speed is 300 r·min-1,and the furrowing and ridging depth is 300 mm.To verify the optimization result,the shaft torque obtained from field experiment with the optimized parameters is 27.9 Nm,and the relative error is less than 5%,which verifies the reliability of the optimized model.The new parametric design method of the furrowing and ridging blade in this study can provide reference for the design and optimization of strawberry furrowing machine in greenhouses.
strawberry greenhousefurrowing and ridging bladeparametric designnumerical simulationfield test
万方数据
维普
