两种人工机械心瓣启闭过程的ALE有限元分析<sup>*</sup>

陈大鹏; 张建海

两种人工机械心瓣启闭过程的ALE有限元分析^*

西南交通大学工程科学研究所成都 610031

基金项目: * 国家自然科学基金;国家教委博士点基金

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出版历程
- 收稿日期: 1995-04-03
- 修回日期: 1995-11-05
- 刊出日期: 1996-04-15

A Comparative Study of the Opening and Closing Process of Two Types of Mechanical Heart Valves Using ALE Finite Element Method

Institute of Compilational Engineering Science, Southwest Jiaofong University, Chengdu 610031, P. R. China

摘要

摘要: 本文采用任意拉格朗日-欧拉(ALE)有限单元法,将血液视为不可压缩粘性流体,同时将人工机械瓣简化为定轴转动刚体,建立了机械心瓣/血液耦合运动的二维计算模型。在此基础上。计算了顺向人工机械瓣(DDM)的开闭过程,并与St.Jude瓣(SJM)进行了对比。由本文研究可得以下主要结论:1.DDM瓣与SJM相比,开启较为迅速,关闭则较为柔和。2.DDM瓣的峰值回流量较之SJM瓣小。本文研究表明DDM瓣由于更好利用了天然心瓣的关闭机理,而具有较高的耐久性潜力。
- 人工机械心瓣 /
- ALE有限元 /
- 固液耦合
Abstract: Using arbitrary Lagrangian-Eulerian(ALE) finite element method,this paper made a comparative study of the opening and closing behaviour of a downstream directional valve(DDM) and a St.Jude medical valve(SJM) through a two dimensional model of mechanical valve-blood interaction in which the valve is considered as a rigid body rotating around a fixed point,and the blood is simplified as viscous incompressible fluid It's concluded that:(1) Compared with SJM valve,DDM valve opens faster and closes the more gently.(2) The peak badk-flow-flow of DDM is smaller than that of SJM.The present investigation shows that being a better analogue of natural valve,DDM has a brighter potential on its durability than SJM.
- artificial mechanical valve /
- ALE finite element method /
- fluidsolid interaction

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参考文献(26)

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