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用于数值模拟的带支架个性化主动脉弓动脉瘤有限元模型的构建

Keywords: 主动脉弓动脉瘤,表面模型,网格划分,有限元模型

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Abstract:

为了准确地分析动脉瘤壁面切应力及梯度变化,采用逆向工程的思想方法,借助Geomagic和Pro/E软件,以原始STL(stereolithography)格式的表面模型为依据,建立了一个个性化主动脉弓动脉瘤实体模型,并在其内部创建理想化支架;利用ANSYS有限元分析软件,最终完成实体模型的建立和分块,并针对边界层和支架进行分区域网格划分.结果表明:所建立的有限元模型可进行血流动力学模拟仿真;模型基本满足对特定区域网格细划分的需要,可以为支架介入治疗动脉瘤的血流动力学仿真提供基础;这种模型建立方法为建立其他类似模型提供了参考.

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