The meshing stiffness is calculated by employing 3-dimensional FEM and its function is formed by cubic spline interpolation and approximation of the discrete mesh points in a mesh period.
采用三维有限元法计算了斜齿轮副啮合刚度，用三次样条插值拟合得到时变啮合刚度函数。
This paper analyses the configuration and transmission theory of spur electromagnetic gear, analyses and computes its magnetic field with 3-dimensional FEM, and works out the figure of magnetic field.
就直齿圆柱电磁齿轮的结构和传动原理进行了分析说明，用三维有限元方法对其进行了电磁场的分析和计算，并给出了电磁场的分布图形。
Based on the three dimensional Finite Element Method (FEM), the temperature and microstructure variations of large scale P20 steel mould during quenching in 3 different processes were studied.
通过建立合适的三维有限元模型，研究了P 20钢大型模具按3种工艺进行淬火时的温度组织变化。
In accordance with soil nailing for deep excavation support, the 3-dimensional nonlinear FEM analysis and calculation was used to simulate the process of construction.
针对深基坑土钉墙支护，采用三维非线性有限元分析方法，模拟研究了深基坑的开挖与支护过程。
In accordance with soil nailing for deep excavation support, the 3-dimensional nonlinear FEM analysis and calculation was used to simulate the process of construction.
针对深基坑土钉墙支护，采用三维非线性有限元分析方法，模拟研究了深基坑的开挖与支护过程。
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