대한의용생체공학회:의공학회지 (Journal of Biomedical Engineering Research)

  • 제12권3호
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  • Pages.149-156
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  • 1991
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  • 1229-0807(pISSN)
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  • 2288-9396(eISSN)
대한의용생체공학회 (The Korean Society of Medical and Biological Engineering)
권호 표지

기계식 이엽심장밸브의 동적거동 해석

Dynamic Behavior Analysis of Mechanical Bileaflet Heart Valve Prosthesis

  • 천길정 (원광대학교 공과대학 기계공학과)
  • 발행 : 1991.09.01
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초록

In this paper, fluttering behavior of mechanical bileaflet heart valve prosthesis was analyzed taking into consideration of the impact between valve plate and stopper Vibration system of the valve was modeled as a rotating system, and equations are induced by moment equilibrium equations. Lift force, drag force, gravity and buoyancy were considered as external forces acting on the valve plate/ The 4th order Runge-Kutta method was used to solve the equations. Valve plate does not come to the static equilibrium position at a stretch, but come to that position after under damping vibration. Damping ratio increases as the cardiac optput increases, and the mean damping ratio is in the range of 0.16~40.25. Fluttering frequency does not have any specific value, but varies as a function of time. It is in the range of 10~40Hz. Valve opening appears to be affected by the orientation of the of the valve relative to gravitational forces.

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참고문헌

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