基于并行拓扑优化的假体股骨柄设计  

DESIGN OF PROSTHETIC FEMORAL STALK BASED ON PARALLEL TOPOLOGY OPTIMIZATION

作　　者：朱大昌[1] 吴龙飞 萧仲敏[1] 黄鹏程 徐汉斌 ZHU DaChang;WU LongFei;XIAO ZhongMin;HUANG PengCheng;XU HanBin(School of Mechanical and Electrical Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学机械与电气工程学院,广州510006

出　　处：《机械强度》2024年第5期1143-1151,共9页Journal of Mechanical Strength

基　　金：广东省高校基础研究重大项目及应用研究重大项目(自然科学类)(2017KZDXM060);广东省创新团队建设项目(自然科学类)(2018KCXTD023);广州市市校(院)联合资助项目(SL2023A03J00681)资助。

摘　　要：与股骨接触的假体柄是人工髋关节的主要部件,在全髋置换手术中起着重要作用。采用变密度固体各向同性材料惩罚(Solid Isotropic Material with Penalization,SIMP)拓扑优化方法和多尺度的并行拓扑优化方法,分别得到A型和B型两种股骨柄结构,并将股骨柄结构柔度变化幅度作为对比指标,比较了两种股骨柄对载荷方向变化的敏感度。利用有限元方法对A型股骨柄和B型股骨柄进行多工况下所对应股骨的应力分析。研究结果表明,在3种工况下,A型股骨柄和B型股骨柄对股骨的平均应力分别为14.80、22.55、16.94 MPa和10.89、20.92、16.50 MPa。对B型股骨柄进行压力加载试验,试验结果表明,在内侧测点,试验的应变值与仿真值的平均误差为-1682με,平均相对误差为20.3%;在外侧测点,试验的应变值与仿真值的平均误差为1281με,平均相对误差为19.5%。该方法为股骨假体柄结构的可靠性设计提供了有效参考。The prosthetic stalk contacting with the femur is the main component of the artificial hip joint and plays an important role in total hip replacement surgery.The topology optimization method of solid isotropic material with penalization(SIMP)and the multi⁃scale parallel topology optimization method were used to obtain the two femoral⁃stalk structures of type A and type B,and the sensitivity of the two femoral stalks to the change of load direction was compared with the amplitude of the flexibility of the femoral stalk structure as a comparison index.The finite element method was used to analyze the stress of the corresponding femur under multiple conditions of type A femoral stalk and type B femoral stalk.The results show that under the three working conditions,the average stress of type A femoral stalk and type B femoral stalk to the femur is 14.80,22.55,16.94 MPa and 10.89,20.92,16.50 MPa.The pressure loading experiment was performed on a type B femoral stalk.The experimental results show that for the inner measurement point,the average error between the strain values and simulated values of this experiment is-1682με,and the average relative error is 20.3%.For the outer measurement point,the average error between the strain values and the simulated values is 1281με,and the average relative error is 19.5%.This method provides an effective reference for the reliablilty design of the femoral prosthesis stalk structure.

关 键 词：拓扑优化 股骨柄结构 有限元分析 可靠性 

分 类 号：TH789[机械工程—仪器科学与技术] TP291.9[机械工程—精密仪器及机械]