基于参数化建模的转子有限元剖分

Finite-element Meshing of a Turbine Rotor Based on Parametric Modeling

分析汽轮机转子的结构特点 ,将汽轮机转子结构参数化 ,提出了汽轮机转子参数化建模的方法 ,提高了转子原始几何模型的输入效率和准确性。利用有限元网格生成的Delaunay三角化方法 ,得到了汽轮机转子二维有限元计算模型 ,生成的有限元网格大小均匀 ,疏密过渡平滑 ,没有奇异单元 。

The structural parametrization of a steam turbine rotor was attained through an analysis of its structural features. A method for the parametric modeling of the turbine rotor was put forward, resulting in an enhancement of the inputting efficiency and precision of the rotor initial geometric model. With the use of a Delaunay triangulation method generated by finite element grids a two-dimensional finite-element calculation model has been obtained. The finite-element grids feature a uniform size, a smooth transition in grid refinement and an absence of singular elements. As a result, fully ensured is the precision of finite element-based analytic calculation of the rotor temperature field and thermal stress.