只有掌握了车轮和轨道的轮廓型面，并将两者相结合，才可能掌握几何接触状况对铁路运营车辆的运行性能所产生的影响。
Only after getting the contours of wheels and rail, and combining the two together, the effect of geometric contact conditions on the running performance of operating railway cars can be obtained.
实验结果表明，分形维数能很好地表征表面轮廓，可为进一步的接触分析提供更合理的几何模型。
Taking rigid disk surface as an example, fractal parameters are obtained by means of power spectrum and structure function, providing a proper geometric model for further contact analysis.
在对深沟球轴承几何参数及接触应力分析的基础上，给出了沟曲率半径系数的控制方程，并对轻、中、重系列轴承的外圈沟曲率半径系数的选取进行了探讨。
Based on the analysis of geometry parameters and contact stresses of the deep groove ball bearings, the control equation of groove curvature radius has been drawn out.
同时明显降低两个堆叠的体量之间的接触面，并加强长方体的几何性质。
This also apparently reduces the contact surface between the two stacked volumes and reinforces the oblong nature of their geometrical form.
这也明显降低了两个堆叠体量之间的接触面，加强它们的长方形的几何特质。
This also apparently reduces the contact surface between the two stacked volumes and reinforces the oblong nature of their geometrical form.
在这种模型中，接触单元的几何和静力约束条件是作为补充方程包含在刚度方程中。
The geometric and static constraint conditions on contact surfaces are treated as additional conditions and are included in stiffness equations.
在此基础上，给出几何非线性问题元胞单元法和接触非线性问题元胞单元法较详细的计算步骤。
On the basis of it, the detailed calculation processes are given about the geometric nonlinearity cellular element method and contact nonlinearity cellular element method.
研究结果表明：接触应力、上扣扭矩、螺纹啮合时的几何约束，是齿面粘扣的力学要点。
The research result states that the contacting stress, thread torque and thread joggle geometry restriction are mechanical points of the sticky thread.
针对以上难题，利用有限元法研究了钻柱在井底的二重非线性(几何非线性和接触非线性)问题。
Thus the finite element method is used to study the duplex nonlinearity (geometric nonlinearity and contact nonlinearity) of the drill string at the well bottom.
不同的车轮踏面形状与同一钢轨匹配时具有不同的轮轨接触几何关系，影响车辆的动力学性能。
The wheel-rail contact geometry relationship is different when different wheel tread shape matches the same rail, which will influence the dynamic performance of the vehicle.
参考资料来源于rcs减缩、无线电波段、接触几何和典型威胁系统见附录a。
Reference data for RCS scales, radio-frequency bands, engagement geometries, and representative threat systems are summarised in Annex a.
多层圆柱结构的接触预紧问题，涉及到几何非线性和材料非线性以及接触面上摩擦力的影响。
The contact pretension between the layers of cylindrical structure concerns the non-linearity of geometry and material, as well as the influence of interface friction.
将CCD应用于几何量测量中，可以满足高精度测量、在线动态检测和非接触测量等的工程实际要求。
Advantages of CCD in geometrical quantity measurement are high accuracy, on-line dynamic detection and non-contact measurement.
分析了砂轮磨损对准平面二次包络环面蜗杆传动的蜗杆几何尺寸以及接触和运动精度的影响。
It analyzes the influence of the grinding wheel wear on geometric size and teeth contact of worm gear, kinematics precision of the quasi-plane double enveloped hourglass one.
利用微分几何和啮合原理推导出该机构的点啮合的诱导曲率方程，给出了接触域大小的计算公式。
With the differential geometry and engagement theories, induced curvature formulas of point engagement were deduced, and the formula of the local contact areas was given.
由于计算中存在着材料非线性、几何非线性以及接触非线性问题，为了提高计算的收敛性能，采用了小时间计算步长。
Because of material nonlinear, geometry nonlinear and contacting nonlinear, the small time step is adopted to improve convergence of the calculation.
本文利用几何关系表示运动学的关系，得出接触方程，使求解过程变得简单。
The paper expresses the kinematic relationship by the geometric relationship between the tool and flute and obtains the contact equation, so that the solving process become simply.
通过对三维数值模拟实施过程中几何建模、接触、网格自适应和重划分等关键技术问题的处理，顺利完成传统方案和改进方案的模拟。
To continue the numerical simulations of the conventional and improved schemes, some key technologies, including geometric model, contact, mesh adapting and remeshing, are solved.
该系统可完成SGM、SFM、SGT、SFT、HGM、HFM、HGT、HFT切齿法的齿坯几何参数、切齿调整参数、轮齿接触分析、磨齿调整参数和根切检验等计算。
The system can perform the computations such as blank dimensions, cutting and grinding settings, tooth contact analysis and under cut check of SGM, SFM, SGT, SFT, HGM, HFM, HGT, HFT cutting methods.
因此，几何变化或失败而高接触应力和过度磨损或许是可以避免的。
Thus, geometric changes or failure due to high contact stresses and excessive wear may be prevented.
第4章主要解决了齿面的参数化和微分几何结构分析问题，它是实现三阶接触分析理论的基础。
Chapter 4 mainly solved the problems of tooth flank parameterization and the analysis of differential geometric structure, which is the theoretical basis to implement the third order contact analysis.
横移量的变化将极大地影响接触斑上的几何参数和力学参数。
The variation of lateral displacement affects extremely the geometry and mechanics parameters in contact zone.
给出了一种基于接触面几何的接触问题解法。
A solution for contact problem based on contact surface geometry is presented.
本文依据齿轮啮合原理，利用产形线形成共轭啮合的原理，采用共轭齿面接触线为刀刃构形的切齿刀具，这样构形的切齿刀具都非常简单，并且容易采用合理的几何角度。
This paper USES cutting tool with the contact line of conjugate tooth profile based on the principle of the gear engage and generating shape line forming conjugate engage.
本文针对滚动轴承的几何结构特点，建立起其接触力学模型，对它的力学特性进行分析并得出一般性结论。
In this paper, we built the contact mechanics model in view of the rolling bearing characteristics, made analysis on the mechanical characteristics and to draw general conclusions.
轮轨接触几何参数的匹配优劣直接影响着轮轨接触应力值的大小。
Rail-wheel contact stress depends to a large extent on the matching of rail-wheel geometry parameters.
算例中，讨论了撞击物的速度、壳体的几何参数以及接触点的位置对浅球壳非线性动力响应的影响。
In the numerical calculation, the effects of striking object's initial velocity, and the shells 'geometrical parameters and the point of contact on the dynamic response of shells are discussed.
针对齿形链链板的几何参数及圆度提出了一种基于CCD图像的测量方法。在一个系统中实现了尺寸和形状的非接触测量。
A new kind of measurement method on geometrical parameters and roundness of tooth shape chain by CCD image technology is put forward, and non-contact measurement in one system is realized.
在工程制图课程学习中，几何元素点、线、面的投影问题是学习形体投影的基础，也是初学者刚开始接触制图知识，学习中容易感觉困难的部分。
In engineering drawing courses, the projection of point, line and surface is the basis of learning physical projection, which is often difficult for beginners to learn.
在工程制图课程学习中，几何元素点、线、面的投影问题是学习形体投影的基础，也是初学者刚开始接触制图知识，学习中容易感觉困难的部分。
In engineering drawing courses, the projection of point, line and surface is the basis of learning physical projection, which is often difficult for beginners to learn.
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