[논문]이산요소법을 활용한 경심이 로타리 작업기의 경운날 축 부하에 미치는 영향 분석

배보민; 정대위; 류동형; 안장현; 최세오; 김연수; 이상대; 조승제

doi:10.7839/ksfc.2023.20.4.115

[국내논문] 이산요소법을 활용한 경심이 로타리 작업기의 경운날 축 부하에 미치는 영향 분석
Effect Analysis of Tillage Depth on Rotavator Shaft Load Using the Discrete Element Method 원문보기

드라이브ㆍ컨트롤 = Journal of drive and control, v.20 no.4, 2023년, pp.115 - 122

배보민 (Department of Bio-Industrial Machinery Engineering, Pusan National University) , 정대위 (Department of Bio-Industrial Machinery Engineering, Pusan National University) , 류동형 (Department of Bio-Industrial Machinery Engineering, Pusan National University) , 안장현 (Department of Bio-Industrial Machinery Engineering, Pusan National University) , 최세오 (Department of Bio-Industrial Machinery Engineering, Pusan National University) , 김연수 (Department of Bio-Industrial Machinery Engineering, Pusan National University) , 이상대 (Smart Agricultural Machinery R&D Group, Korea Institute of Industrial Technology) , 조승제 (Smart Agricultural Machinery R&D Group, Korea Institute of Industrial Technology)

Abstract ▼ AI-Helper

This study utilized a discrete element method (DEM) simulation, as one of the virtual field trials, to predict the impact of tillage depth on the rotary blade shaft during rotavator tilling. The virtual field for the simulation was generated according to soil properties observed in an actual field. Following the generation of particles for the virtual field, a sequence of calibration steps followed to align the mechanical properties more closely with those of real soil. Calibration was conducted with a focus on bulk density and shear torque, resulting in calibration errors of just 0.02% for bulk density and 0.52% for shear torque. The prediction of the load on a rotary tiller's blade shaft involved a three-pronged approach, considering shaft torque, draft force, and vertical force. In terms of shaft torque, the values exhibited significant increases of 42.34% and 36.91% for every 5-centimeter increment in tillage depth. Similarly, the vertical force saw substantial growth by 40.41% and 36.08% for every 5-centimeter increment. In contrast, the variation in draft force based on tillage depth was comparatively lower at 18.49% and 0.96%, indicating that the effect of tillage depth on draft force was less pronounced than its impact on shaft torque and vertical force. From a perspective of agricultural machinery research, this study provides valuable insights into the DEM soil modeling process, accounting for changes in soil properties with varying tillage depths. These findings are expected to be instrumental in future agricultural machinery design studies.

주제어

표/그림 (15)

그림 Fig. 1 Field experiment for soil properties
그림 Fig. 2 Shear torque measurement procedure (a) on field test (b) virtual vane shear test
표 Table 1 Specification of simulation computer
표 Table 2 Major particle model parameters in EDEM software
그림 Fig. 3 Calibration procedure based on bulk density and shear torque
그림 Fig. 4 DEM simulation for rotary blade load prediction
표 Table 3 Modeling parameters of contact model in EDEM software
그림 Fig. 5 Results of cone penetration test
그림 Fig. 6 Calibration of shear torque using vane shear test
표 Table 4 Measured soil properties according to soil depth
표 Table 7 Calibration results of bulk density
표 Table 8 Calibration results for shear torque using field measurements values.
그림 Fig. 7 Prediction of shaft torque based on tillage depth in DEM
그림 Fig. 8 Predict draft force and vertical force based on tillage depth in DEM
표 Table 9 Load prediction based on tillage depth using DEM

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상세보기
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상세보기
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