摘要
建立了主动脉瓣膜的有限元模型 ,几何模型参考人工生物瓣膜的形状 ,材料模型采用准线弹性模型。运用有限元动态分析方法仿真主动脉瓣膜在心室舒张初期的运动。仿真结果表明 :瓣膜在心室舒张初期产生振动。瓣膜弹性变差、厚度增加、跨瓣压变化率减小或初始跨瓣压变小 ,使瓣膜振动产生的声音减弱 。
A finite element aortic valve model is described. The geometry and material property of the model are more exact than before. The finite element dynamic analysis was used to, emulate the closed valve motion during the early diastole. The results of emulating demonstrate that the closed valve vibrates during early diastole. They also reveal that the increase in stiffness of valve, the augmentation thickness of valve, the decrease in the rate of change of the pressure, and the reduction of the initial pressure may affect the vibration and cause the diminution of the aortic component of the second heart sound.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
2001年第4期557-560,共4页
Journal of Biomedical Engineering
基金
福州大学科技发展基金研究项目 [XKJ( YM) 0 0 -10 ]
关键词
主动脉瓣膜
有限元模型
振动
第二心音
仿真
Biomedical engineering
Finite element method
Stiffness
Vibration measurement
