This method takes fully into account the characteristics of supports and loads, deals especially with the nonlinearity of oil film force of guide bearing caused by vertical arrangement of spindle.
该方法充分考虑了主轴支承边界条件和有关载荷方面的特点，特别是考虑了由于主轴的垂直安装引起的油膜力的非线性。
As 2-d 3-t heat conduct equations are discretized in a fully implicit method, it is very difficult to solve the nonlinear algebraic equations obtained due to strong nonlinearity.
由于二维三温热传导方程具有很强的非线性特性，因此采用全隐格式对该方程离散后，所得非线性代数方程组的求解将变得非常困难。
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