摘要
机身等薄壁结构冲击、坠撞的数值仿真中大量地采用壳单元进行计算,壳单元是一类高效的计算单元,在大型有限元数值模拟中,选择壳单元计算,可适度减少问题的分析规模,节约计算资源。针对壳单元计算中的网格尺度效应,本文提出了壳单元标定技术、介绍了该技术的实现过程,并通过数值算例验证了壳单元标定技术的有效性和可靠性。壳单元标定技术的实现为提高薄壁结构数值计算效率提供了有益的参考,为解决工程应用中有限元数值仿真的计算效率与精度的矛盾提出新的思路和方法。
Shell element is widely adopted in the hitting or impacting numerical simulation of thin-walled structures such as body of aircraft.Shell element is an efficient calculation element and in the large-scale finite element simulation,selecting shell element to calculate will be appropriate to reduce the analysis scale of problem and save computing resources.For the grid-scale effects of shell element during the calculation,it proposed the shell element calibration technique and introduced the implementation process of this technology,then through the numerical example the validity and the reliability of the shell element calibration technique was tested.Realization of this technique provides a useful reference to improve the efficiency of thin-walled structure numerical calculation and proposes new ideals and methods to solve the contradictions of computational efficiency and accuracy in finite element simulation.
出处
《机械设计与制造》
北大核心
2012年第7期253-255,共3页
Machinery Design & Manufacture
基金
航空科学基金资助(20060953013)
关键词
薄壁结构
壳单元
壳单元标定
反演
Thin-Walled Structure
Shell Element
Shell Element Calibration Technique
Inversion
