斜坐标系

通过建立斜坐标系，简化计算过程，推导出了二次有理B样条曲线曲率的单调条件。

The curvature monotony condition for the quadratic rational B spline curve is derived by using the skew coordinate system that can reduces the calculation process .

本文借助阶跃函数和斜坐标系，建立了组合抛物面屋盖的壳面方程，然后应用扁壳非线性理论和Navier法，导出了组合抛物面屋盖非线性分析的计算公式。

In this paper , the curved surface equation of the composite paraboloid roof is established by means of step function and inclined coordinate . The calculating formulas of nonlinear analysis for the composite paraboloid roof are then derived from the nonlinear theory of shallow shell and the Navier method .

推导出斜坐标系下，亥姆霍兹方程的五点差分格式；

The five-grid difference format of Helmholtz equation in slanting coordinate have been derived .

推导了斜坐标系下螺旋槽流体动静压滑动轴承的油膜厚度方程、速度方程和扰动压力的雷诺方程。

An oblique coordinate system is used to formulate the film thickness equation , the velocity equation , Reynolds equation of perturbance pressure for spiral oil wedge hydrodynamic bearing .

对计算中的积分奇异性采用三角形斜坐标系、退化单元法进行处理，构造了三角形、四边形线性等参元和四边形二次等参元。

The skew triangle coordinate and the degenerative elements are used to overcome the singular integrals and the isoparametric elements of linear triangular and quadrilateral elements and quadratic quadrilateral elements are constructed .

本文分析了晶体三斜坐标系绕一基矢转动后，新旧基矢间的线性变换关系，推导出描述这个变换的矩阵；

For the rotation of the triclinic axes about some axis through nay angle the linear transformation between new set of axes and old one has been treated , and the transformation matrix is presented .

利用已有的三维双相材料位移基本解，给出了在与界面斜交坐标系下位移基本解的一般表达式。

Relied on previous data , the general expression of displacement fundamental solution for three-dimension bi-materials under coordinate system oblique to interface is given .

本文提出了一种在任意斜交曲线坐标系中确定矢量的Helmholtz方程分量式的一般方法&直接微商法。

The general method being proposed in the paper is related to derive Component From Helmholtz 's vector equation against oblique Curvilinear Coordinate , called " Dircct Differentiating Approach " .

建立了任意斜交曲线坐标系下液体火箭发动机（LRE）内部工作过程的气液两相湍流化学反应流模型。

Two-phase turbulent reacting flow model of the internal operating processes in Liquid Rocket Engine ( LRE ) is set up in non-orthogonal curvilinear coordinates .

推导出斜裙面坐标系与随艇坐标系的位置信息的转换矩阵。

Conversion matrix of position information is derived between gradient-skirt and control reference frames .

由于圆弧形油腔斜置，为计算准确在斜坐标系下推导出了雷诺方程、油膜厚度方程和速度方程的有限差分公式。

Because of spiral oil wedge , a oblique coordinate system was used to formulate the finite differential formulas of Reynolds equation , film thickness equation and velocity equation for accurate compute .

通过建立正、斜交坐标转换关系，提出了直接在斜变坐标系内描述单元整体位移的方法。

Presenting the method describing the space displacements of the element in the skew coordinate system by means of building the formula of coordinate transformation between the orthogonal coordinate and the skew coordinate .

根据螺旋槽流体动静压滑动轴承有三个斜置的圆弧形油腔的结构特点，推导出直角坐标系和斜坐标系的转化式以及斜坐标下轴承的雷诺方程。

According to the features of three tilted spiral oil wedges in spiral oil wedge hydrodynamic bearing , an equation is formulated between the rectangular axis and the oblique coordinate system , and an oblique coordinate system is used to formulate the Reynolds equation of bearing .