Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Discrete element analysis for design modification of leveling blade on motor grader vehicle

모터 그레이더 평탄작업용 블레이드의 설계개선을 위한 개별요소법 해석

  • 송창헌 (한국생산기술연구원 건설기계기술센터) ;
  • 오주영 (한국생산기술연구원 건설기계기술센터) ;
  • 조정우 (한국생산기술연구원 건설기계기술센터) ;
  • 김문규 (한국생산기술연구원 건설기계기술센터) ;
  • 석정호 (네오시스템)
  • Received : 2021.09.11
  • Accepted : 2021.11.09
  • Published : 2021.11.30
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Abstract

The blade of motor grader is used for scattering and leveling the aggregates on the foundation of road construction site. The paper performed a design improvement research of the blade part to enhance the working efficiency of motor graders. The scattering works of aggregates by blade driving were simulated by DEM (discrete element method) of a dynamic code. The four design parameters were selected and a specific leveling scenario for the simulation was determined. The nine blade models were numerically experimented, and the sensitivity of each factors was analyzed. Next, the design factors that influence a blade performance have been selected by ANOVA, and these key design factors were applied to the progressive quadratic response surface method (PQRSM). The optimum set of design factors of the blade was finally proposed.

모터 그레이더의 블레이드는 도로공사시 골재를 산포하고 평탄화하는 역할을 수행한다. 본 연구는 그레이더의 작업효율을 향상시키기 위하여 블레이드 부품의 설계개선 연구를 진행하였다. 블레이드와 골재 입자의 접촉, 절삭, 산포 과정을 모사하기 위하여 동해석 코드에 개별요소법을 도입하여 전산해석 모델을 수립하였다. 블레이드 설계인자를 4가지 선별한 후 작업 시나리오를 수립하였다. 실험계획의 직교배열을 통해 각 인자의 수준조합별 9개 모델에 대해 평탄화 작업에 대한 동해석을 수행하고, 각 설계인자의 영향도를 분석하였다. 이후 유의한 인자를 분산분석을 통해 선별하여 최적화기법으로 점진적 반응표면법을 적용하였다. 최종적으로 블레이드의 작업 효율성을 향상시킬 수 있도록 설계인자의 최적값을 제안하였다.

Keywords

Acknowledgement

본 연구는 국토교통부 스마트건설기술연구사업, 도로실증을 통한 스마트 건설기술 개발 과제(3세부 디지털 기반 도로 건설장비 자동화 기술 개발) (20SMIP-A157130-01)의 지원으로 수행되었습니다. 이에 감사 드립니다.

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