白内障超声乳化手柄的设计及ANSYS有限元优化分析  

Design of phacoemulsification handpiece and ANSYS finite element optimization analysis

作　　者：肖元[1] 王延群[1] 宋学东[1] 杨军[1] 

机构地区：[1]中国医学科学院北京协和医学院生物医学工程研究所,天津300192

出　　处：《国际生物医学工程杂志》2013年第2期103-107,115,共6页International Journal of Biomedical Engineering

基　　金：国家科技支撑计划子课题项目（2012BAIBB00）

摘　　要：目的 设计小体积、振幅放大系数大的超声乳化手柄.方法 介绍了压电换能器和超声变幅杆的机电振动特性,分别使用等效电路法和解析法,对压电换能器和超声变幅杆的尺寸进行设计,并设计出了四分之一波长压电换能器和四分之一波长超声变幅杆；最后,使用有限元分析软件ANSYS11.0,进行模态和谐响应分析,对手柄进行仿真验证和加负载针头后手柄尺寸进行优化.结果 手柄纵向振动频率和振速振幅放大系数都与理论设计非常接近,误差分别为1.4％、5.8％；在压电陶瓷片上加载300V正弦电压时,针头末端振幅可达125.5μm,能达到白内障乳化手术的需要.结论 本设计大大减小了手柄的体积,获得了较大的振幅放大系数,仿真结果充分验证了理论设计的正确性.Objective To design phacoemulsification handpiece with small size and high amplitude amplification coefficient.Methods By introducing the electro-mechanical vibration characteristics of piezoelectric transducer and ultrasonic horn,and adopting the equivalent circuit method and analytical method,respectively,the size of the ultrasonic horn,quarter wavelength piezoelectric transducer and ultrasonic horn were designed.Then,modal and harmonic analysis in finite element analysis software ANSYS11.0 were used to simulate the handpiece,and to optimize the size of the handpiece after adding on needle.Results The results indicated that the longitudinal vibration frequency and amplification coefficient were very close to theoretical design.The errors were 1.4% and 5.8%,respectively.When piezoelectric ceramics were loaded with 300 V sinusoidal voltage,the displacement amplitude at the end of the needle reached 125.5 μm,which could meet the phacoemulsification surgery needs.Conclusion This design greatly reduced the size of the handpiece,and obtained high amplitude amplification coefficient.The simulation results sufficiently validated the theoretical design.

关 键 词：超声乳化手柄 压电换能器 超声变幅杆 有限元分析 

分 类 号：R779.66[医药卫生—眼科]