대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제40권1호
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  • Pages.33-39
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  • 2016
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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마찰곡선을 반영한 인공 고관절 마찰소음 유한요소 해석연구

Investigation of Hip Squeak Using Finite Element Modeling with a Friction Curve

  • 남재현 (공주대학교기계자동차공학부) ;
  • 박기완 (공주대학교기계자동차공학부) ;
  • 강재영 (공주대학교기계자동차공학부)
  • Nam, Jaehyeon (Dept. of Mechanical Engineering, Kongju Nat'l Univ.) ;
  • Park, Kiwan (Dept. of Mechanical Engineering, Kongju Nat'l Univ.) ;
  • Kang, Jaeyoung (Dept. of Mechanical Engineering, Kongju Nat'l Univ.)
  • 투고 : 2015.07.23
  • 심사 : 2015.11.17
  • 발행 : 2016.01.01
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초록

본 논문은 복소수 고유치해석을 통하여 세라믹-세라믹 인공고관절 시스템에서의 동적 불안정성을 연구하고자 하였다. 시스템 파라메터 연구를 통해서 모드 연성 기반의 불안정성을 연구하였고, 음의 기울기를 포함하는 유한요소 해석 모델을 구현하여 음의 기울기에 의한 불안정성에 대해 조사하였다. 그 결과 토션이 지배적인 시스템 모드가 음의 기울기에 의해 불안정해 지며, 이는 축하중에 크게 영향을 받는다는 점을 확인하였다.

This study investigated the dynamic instability of a ceramic-on-ceramic artificial hip joint system through complex eigenvalue analysis. We examined the mode-coupling mechanism through eigenvalue sensitivity analysis with the variation of system parameters. In addition, we constructed a finite element model including the negative slope of friction curve for investigating the negative-slope mechanism in the hip squeak problem. The numerical results show that the torsion-dominant mode becomes unstable due to the presence of the negative slope while the axial load is the important factor influencing the negative-slope type instability.

키워드

참고문헌

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