Journal of Drive and Control (드라이브 ㆍ 컨트롤)

The Korean Society for Fluid Power and Construction Equipment (유공압건설기계학회)
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Effect Analysis of Tillage Depth on Rotavator Shaft Load Using the Discrete Element Method

이산요소법을 활용한 경심이 로타리 작업기의 경운날 축 부하에 미치는 영향 분석

  • Bo Min Bae (Department of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Dae Wi Jung (Department of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Dong Hyung Ryu (Department of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Jang Hyeon An (Department of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Se O Choi (Department of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Yeon Soo Kim (Department of Bio-Industrial Machinery Engineering, Pusan National University) ;
  • Sang Dae Lee (Smart Agricultural Machinery R&D Group, Korea Institute of Industrial Technology) ;
  • Seung Je Cho (Smart Agricultural Machinery R&D Group, Korea Institute of Industrial Technology)
  • 배보민 ;
  • 정대위 ;
  • 류동형 ;
  • 안장현 ;
  • 최세오 ;
  • 김연수 ;
  • 이상대 ;
  • 조승제
  • Received : 2023.11.10
  • Accepted : 2023.11.24
  • Published : 2023.12.01
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Abstract

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.

Keywords

Acknowledgement

본 결과물은 농림축산식품부의 재원으로 농림식품기술기획평가원의 밭농업기계화촉진기술개발사업의 지원을 받아 연구되었음(RS-2023-00236042)

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