摘要
有限元技术在研究生物力学研究中处于很重要的地位,而材料的设定对其特征影响重大。为得到更符合实际的牙周膜材料参数,基于中心复合设计对材料参数排列组合,利用有限元得到相对应的应力,以仿真、试验二者数据间的均方根误差作为其目标函数,通过对该模型进行一系列验证合理后,搜索目标函数值最小时的牙周膜最优参数。使用ABAQUS得到仿真数据,与试验数据一起绘出对比曲线。该曲线二者相关系数为0.98246,符合度较高,牙周膜最终识别参数为弹性模量49.217 MPa,泊松比0.425,验证了该材料特性参数识别方法的合理性,具有很好的理论意义和科学价值。
The finite element technique plays a very important role in biomechanics research,and the material setting has a great influence on its characteristics.To obtain more realistic periodontal ligament material parameters,these parameters are combined based on the center composite design,and the stresses of different combinations are obtained by finite element analysis.The root mean square error of simulation data and experimental data is used as the objective function.After a series of validation of the model,the optimal parameters of periodontal ligament are searched when the objective function value is the smallest.The ABAQUS is used to calculate the simulation data and draw the comparison curves with the experimental data.The correlation coefficient between two curves is 0.98246,and indicates a high degree of coincidence.The final identified parameters of the periodontal ligament are elastic modulus 49.217 MPa and Poisson’s ratio 0.425.The study results verifies the reliability of the material characteristic parameter identification method and has important scientific significance and theoretical value.
作者
高菁兰
刘德海
祁晨希
宋阳
GAO Jinglan;LIU Dehai;QI Chenxi;SONG Yang(Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tianjin University of Technology,Tianjin 300384,China)
出处
《天津理工大学学报》
2024年第1期148-152,共5页
Journal of Tianjin University of Technology
基金
国家自然科学基金(11702190)。
关键词
生物力学
牙周膜
反求参数
中心复合设计
biomechanics
periodontal ligament
reverse parameters
central composite design
