对大动脉动脉瘤的生物力学分析的计算:计算网格的重要性
Farah Alkhatib1, Adam Wittek1, Benjamin F Zwick1
1Intelligent Systems for Medicine Laboratory, The University of Western Australia, Perth, Western Australia, Australia.
概括
这项研究比较了有限元分析方法,用于计算腹腔大动脉动脉瘤 (AAA) 中的大动脉壁应力. 结果显示,网格类型和配方显著影响应力精度,这对于破裂风险评估至关重要.
科学领域:
- 生物医学工程 生物医学工程
- 计算力学 计算力学 计算力学
- 心血管研究研究心血管研究
背景情况:
- 大动脉壁应力是腹腔大动脉动脉瘤 (AAA) 破裂风险评估的关键.
- 有限元分析 (FEA) 主导着应力计算,但FE配方和网格质量效应未得到充分研究.
研究的目的:
- 调查FE配方,网格类型和元素质量对AAA墙壁应力计算的影响.
- 在FEA中比较四面体和六面体网格,用于AAA应力分析.
主要方法:
- 对使用四面体和六面体网格的十名AAA患者的FEA结果进行了比较.
- 多种FE配方 (基于位移,混合),形状函数,集成方案和元素数.
主要成果:
- 不同的FE配方和网格类型产生不同的大动脉壁应力结果.
- 网格质量和元素数量显著影响计算精度和稳定性.
结论:
- FE配方和网状结构对于准确的AAA墙壁应力预测至关重要.
- 了解这些因素可以提高FEA对AAA断裂风险评估的可靠性.
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