터널과지하공간 (Tunnel and Underground Space)

  • 제29권3호
  • /
  • Pages.135-147
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  • 2019
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  • 1225-1275(pISSN)
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  • 2287-1748(eISSN)
한국암반공학회 (Korean Society for Rock Mechanics and Rock Engineering)
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진동기반 하중 추정기법의 이론 및 암반 천공용 유압 브레이커 적용사례

The Theory of Load Estimation Method and Case Study of Hydraulic Breaker for Rock Drilling

  • 김대지 (한국생산기술연구원 건설기계부품그룹) ;
  • 조정우 (한국생산기술연구원 건설기계부품그룹) ;
  • 오주영 (한국생산기술연구원 건설기계부품그룹) ;
  • 정진태 (한양대학교 기계설계공학과) ;
  • 송창헌 (한국생산기술연구원 건설기계부품그룹)
  • Kim, Dae-ji (Construction Equipment R&D Group, Korea Institute of Industrial Technology) ;
  • Cho, Jung-Woo (Construction Equipment R&D Group, Korea Institute of Industrial Technology) ;
  • Oh, Joo-Young (Construction Equipment R&D Group, Korea Institute of Industrial Technology) ;
  • Chung, Jintai (Department of mechanical design engineering, Hanyang University) ;
  • Song, Changheon (Construction Equipment R&D Group, Korea Institute of Industrial Technology)
  • 투고 : 2019.04.29
  • 심사 : 2019.06.03
  • 발행 : 2019.06.30
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문은 기계시스템의 하중추정 기법 및 적용사례 소개가 목적이다. 이를 위해 진동기반 하중추정 기법의 이론적 배경 및 하중정량화 절차를 구체적으로 설명하였다. 또한 충격하중 및 진동이 발생하는 천공장비에 적용하여 진동기반 하중추정 기법의 적용성과 한계점을 분석하고 이에 대한 대응책에 대해 논의하였다. 마지막으로, 하중추정 기술의 추가 연구의 필요성을 토의하고, 새로운 충격하중 측정기술 개발을 위한 방법론을 제안하였다.

This paper introduced a impact load estimation method by examining vibration transfer path analysis (TPA). The theoretical background and the load quantification procedure are explained, and a case study of hydraulic breaker is reported. We explained the merits and limitations of the load estimation method of TPA, and improvement method was suggested through case analyses of drilling equipment. The necessity of R&D of load-estimation technology was discussed. A new strategy for developing new techniques for impact load measurement was proposed.

키워드

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Fig. 1. Schematic of transfer path analysis model; active subsystem generating force and acoustic loads, and a passive subsystem responding to these loads (Song et al. 2017)

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Fig. 2. Process for quantifying transfer path analysis sources (Song et al., 2017)

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Fig. 3. Schematic diagram of the procedure for load estimation method

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Fig. 4. Schematic of the hydraulic breaker; (a) isometric view, (b) cross section A-A’ (Song et al., 2017)

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Fig. 5. Installation positions of triaxial accelerometers, (Song et al., 2016)

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Fig. 6. Mechanism of the hydraulic breaker and vibration test setup (Song et al., 2017)

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Fig. 7. Measured vibration signal from the operating hydraulic breaker.(Song et al., 2017)

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Fig. 8. Measured frequency response function by modal impact test (Song et al., 2016)

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Fig. 9. Mode shapes and natural frequencies of the hydraulic breaker housing. (Song et al., 2017)

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Fig. 10. Position of isolation pad in a hydraulic breaker (Song et al., 2016)

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Fig. 11. Contribution of impact loads in the hydraulic breaker (Song et al., 2016)

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Fig. 12. Breaker shock wave of impact energy strain (Song et al., 2017)

Table 1. Results of impact loads in the hydraulic breaker

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Table 2. Results of impact energy measurement

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