资料转移技术在三维有限元中的应用

Data Transfer In 3D H-Adaptive FEA

本文研究了两类用于三维h自适应网格管理的资料转移方法。文中将牺牲解的精度以节省计算时间的一类资料转移的简单方法(简法)与另一类在资料转移中确保解的精度的严格方法(严法)进行了比较分析,并通过数值计算例题进行了论证,结果表明:对于简单问题,两类方法都能满足精度,完成资料转移。对于复杂应力状态问题,严法更可靠,特别是在网格稀疏时,严法明显优越。

Two kinds of data transfer methods f or 3D h -adaptive mesh management are presented.In this paper,a simple data transfer method sacrificing solution accuracy for s aving computation time is compared w ith a rigorous data transfer method k eeping the accuracy of solution.The accuracy of data transfer was verifi ed by a numerical computation proble m.The result indicated that for simp le problem both methods achieved data transfer with acceptable error.For problems with complex stress states,rigorous method is more reliab le.For coarsening in particular,th e rigorous method is recommended.