人工生物瓣膜流固耦合分析

Fluid Solid Interaction Analysis of Bioprosthetic Heart Valve

该文构建一种人工生物瓣膜模型和血液流体模型,利用罚函数法建立瓣膜与血液间的耦合,利用ANSYS软件分析心循环下人工生物瓣膜力学特性。分析结果表明,应力集中于缝合边与结合边交界处,此种瓣膜应力分布均匀。同时,瓣膜完全开启时间与实际测量数据吻合,血液流速峰值在生理范围内。该模型为提供更加真实心循环下瓣膜力学特性打下基础,为下一步优化设计人工生物瓣膜提供便利。

This paper constructs numerical models of bioprosthetic heart valve and blood. The fluid solid interaction is carried out using penalty function method. The mechanical property of the bioprosthetic heart valve during cardiac cycle is simulated with ANSYS software. Results show that the Von Mises stress concentrates at the junction of attachment edge and coaptation edge. The open time of bioprosthetic heart valve is consistent with that of actural measurement. The peak velocity of blood is in the range of physiology. This model provides more realistic mechanical property of bioprosthetic heart valve during cardiac cycle compared to pure solid model, and facilitates design and optimization of bioprosthetic heart valve.