基于流固耦合的分叉囊状动脉瘤应力分析  

Stress analysis of bifurcated saccular aneurysm based on fluid-structure interaction

作　　者：余建平[1] 蔡源 张海林[2] 潘毅 YU Jianping;CAI Yuan;ZHANG Hailin;PAN Yi(School of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China;Department of Neurosurgery,The Second Hospital of Lanzhou University,Lanzhou 730030,China;The Second Clinical Medical College of Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]兰州大学第二医院神经外科,甘肃兰州730030 [3]兰州大学第二临床医学院,甘肃兰州730000

出　　处：《甘肃科学学报》2025年第2期132-138,共7页Journal of Gansu Sciences

基　　金：兰州大学第二医院“萃英学子科研培育计划”项目(CYXZ2021-50)。

摘　　要：颅内动脉瘤按形态可分为囊状动脉瘤\,梭形动脉瘤和夹层动脉瘤,其中囊状动脉瘤占比超过90%,而分叉处是动脉瘤易发的位置。为探究影响分叉囊状动脉瘤生长和破裂的力学指标,预测其可能破裂的位置,采用双向流固耦合的数值计算方法,对血液流速、瘤壁变形、应力分布等因素进行分析。研究结果表明,壁面剪切应力(WSS)和冯·米塞斯(Von Mises)应力在分叉囊状动脉瘤生长和破裂中起到重要作用,并在此基础上提出一种动脉瘤破裂风险评价模型。Intracranial aneurysms can be divided into saccular aneurysms,spindle aneurysms and dissecting aneurysms according to morphology,of which saccular aneurysms account for more than 90%,and bifurcation is the location where aneurysms are prone to occur.In order to explore the mechanical index affecting the growth and rupture of bifurcated cystic aneurysms and predict the location of their possible rupture,the numerical calculation method of bidirectional fluid-structure interaction was used to analyze the blood flow velocity,aneurysm wall deformation,stress distribution and other factors.The results showed that wall shear stress(WSS)and Von Mises stress played an important role in the growth and rupture of bifurcated cystic aneurysms.Therefore,an aneurysm rupture risk assessment model was proposed based on the results.

关 键 词：囊状动脉瘤 双向流固耦合 Von Mises应力 壁面剪切应力 

分 类 号：R743[医药卫生—神经病学与精神病学]