Optimization of the Angle of Frog in Mouldboard Tillage Operations in Sandy Clay Soil  

作　　者：Angela Hiuhu Ayub Njoroge Gitau Duncan Onyango Mbuge John Ndisya Mulwa 

机构地区：[1]Department of Biosystems Engineering, University of Nairobi, Nairobi, Kenya

出　　处：《Open Journal of Optimization》2015年第4期131-140,共10页最优化（英文）

摘　　要：This paper investigated the effect of three independent variables including: tillage speed (ranges of below 2.5 m/s and between 2.5 m/s and 5 m/s), tillage depth (range of 10 cm from 0 cm to 30 cm) and frog angle (30&deg 40&deg, and 50&deg) on draught forces. The experimental work was completed with determination of the draught forces using an analytical method (Saunders Equation). Numerical Simulation: Discrete Element Method (DEM) was used to verify the results obtained analytically. The results indicated that tillage depth has a stronger influence on the draught forces as compared to the tillage speed. Minimal draught forces can then be achieved through operating at shallow tillage depth and maintaining a frog angle of 30&deg. The results showed a variance of ±15.95% to the calculated values supporting DEM as a numerical method capable of predicting draft forces correctly, tillage power optimization and determination of optimal frog angle for the mouldboard plough.This paper investigated the effect of three independent variables including: tillage speed (ranges of below 2.5 m/s and between 2.5 m/s and 5 m/s), tillage depth (range of 10 cm from 0 cm to 30 cm) and frog angle (30&deg 40&deg, and 50&deg) on draught forces. The experimental work was completed with determination of the draught forces using an analytical method (Saunders Equation). Numerical Simulation: Discrete Element Method (DEM) was used to verify the results obtained analytically. The results indicated that tillage depth has a stronger influence on the draught forces as compared to the tillage speed. Minimal draught forces can then be achieved through operating at shallow tillage depth and maintaining a frog angle of 30&deg. The results showed a variance of ±15.95% to the calculated values supporting DEM as a numerical method capable of predicting draft forces correctly, tillage power optimization and determination of optimal frog angle for the mouldboard plough.

关 键 词：DEM EDEM Soil-Cut Interactions Modelling TILLAGE DRAUGHT 

分 类 号：R73[医药卫生—肿瘤]