过盈联接有限元分析的接触算法选择

过盈联接有限元分析的接触算法选择
由博
【期刊名称】《价值工程》
【年(卷),期】2018(037)004
【摘要】接触算法对有限元分析结果及其计算时间有很大影响,因此,对于采用有限元方法预测压装曲线而言,选择一个合适的接触算法是至关重要的.本文首先建立了过盈联接的三维有限元模型,然后分别用罚刚度法、增强拉格朗日法及普通拉格朗日法对过盈联接进行有限元分析,最后通过控制法向刚度系数(FKN)、切向刚度系数(FKT)、渗透量(FTOLN),分别评价上述三种方法的计算精度和收敛性.分析结果表明在相关参数控制得当的情况下,三种方法都可以得到精确的结果,但是它们的计算时间有很大区别,其中计算时间最短的是增强拉格朗日算法.%Contact algorithm has significant influence on the analytic results and calculation time of Finite Element (FE) analysis. It is important to choose an appropriate contact algorithm to predict the press-fit curve with FE method. In this work, a three-dimensional (3D) FE model of a press-fit assembly was set up firstly. Then, it was analyzed by using three different contact algorithms, namely Pure Penalty, Augmented Lagrangian and Normal Lagrange. Finally, the accuracy and the convergence of their calculation results were evaluated with the governing contact algorithms options, including Normal stiffness factor (FKN), Tangent stiffness factor (FKT), Penetration tolerance (FTOLN). The results indicated that accurate results could be obtained through setting the governing parameters properly in all of three contact
algorithms, but their calculation efficiencies were quite different. Obviously, the calculation time of Augmented Lagrangian was the shortest.
【总页数】4页(P156-159)
【作者】由博
【作者单位】吉林化工学院航空工程学院,吉林132021
【正文语种】中文
【中图分类】TH131.7
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