摘要
定子铁心由叠片组成,在吊装过程中处于复杂的各向异性三维弹塑性变形状态,若采用基于传统的单向拉伸试验得到的材料参数进行计算,必然会引入较大的计算误差。本文提出一种直接从吊装应变实验和有限元仿真反求材料参数的方法。该方法将参数反求的问题转换为求试验测量值与仿真计算值之差最小的优化问题。试验测量值为铁心的应变值,而待求的参数为铁心的径向弹性模量。采用径向基函数代理模型的优化策略代替有限元大量结构重分析,对减少有限元的耗时模拟有重大意义。
The stator core is composed of laminations. In hoisting assembly operation, the stator core undergoes 3D anisotropic elasto---plastic deformation and there are errors in the simulation results by using the data from the conventional tensile test. An identification approach of material parameters directly using strain of the hoisting processes is presented. This method is to convert the problem of identification of parameters to the problem of seeking optimization, i.e. the least difference between the values of measurement and simulation calculation. The value measured is strain of stator core and the parameters sought is the radial elastic modulus parameters of the material. Optimization strategy using the radial basis function metamodel is important to reduce the times of optimization iteration when the simulation of hoisting process takes much time.
出处
《大电机技术》
北大核心
2014年第1期28-30,共3页
Large Electric Machine and Hydraulic Turbine
基金
国家自然科学基金资助项目(50745018)
湖南省教育厅资助科研项目(10C0552)
关键词
定子铁心
参数反求
径向基函数
应变
有限元
stator core
plastic parameters identification
radial basis functions
strain
FEM
