【摘要】 工程问题三维有限元仿真的主要困难是模型的建立 ,而模型的建立需要采用合适的方法来生成高质量的三维有限元网格 .以金属塑性成形过程的三维有限元仿真为例 ,说明了采用六面体单元的必要性 .针对典型的有限元六面体网格生成方法 ,系统地分析了各种方法的实现原理和发展趋势 ,并探讨了六面体网格生成总的发展趋势 .分析结果说明 ,复杂域内六面体网格全自动生成的实现是全自动网格生成真正走向实用化、通用化必须解决的难题 .更多还原

【Abstract】 The major difficulty with the 3-D finite element simulation of an engineering problem lies in the construction of models, which needs the proper generation of 3-D finite element hexahedral mesh of high quality. The necessity to use a hexahedral unit is justified by taking the 3-D finite element simulation of the plastic formation of metals as an example. The theories behind and trends of development of different ways of generating finite element hexahedral meshes are systematically analysed, and the general trend of development for generation of hexadedral mesh is discussed as well. It is concluded that the full automatic generation of hexahedral mesh in complex domains is the key to the popularization of full automatic generation of hexahedral mesh.更多还原