- 更多网络例句与包络面相关的网络例句 [注：此内容来源于网络，仅供参考]
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Based on that,the problem of reconstruction is studied according whether the axis-track surface is developable or not,and some valuable conclusions are derived.
在得出包络面、轴迹曲面、等效轴迹曲面互为等距曲面的结论的基础上，研究了轴迹曲面可展与不可展两种情况下的非等径包络重构问题，得到了一些有价值的结论。
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First, this paper, in the field of intrinsic geometry, studies the geometric problems on garment design, as well as applies the frame and semi-geodesic coordinates to prove the fundamental theorem of being a developable surface.
文中首先在内在几何学的层次上，研究了服装设计所涉及的几何学问题，应用标架与半测地坐标方法证明了曲面成为可展面的基本定理，研究了可展面的分类及其性质，考虑到服装三维几何造型的需要，证明了组合式可展面各组成片相切连接条件的命题，作为构造可展面的理论依据，证明了单参数平面族的包络面必为可展面的命题，在此基础上发展出服装几何造型的"刮大白"方法以及相关的三种构造可展面的解析方法。3D→2D的变换是三维服装CAD的重要内容之一，其几何学实质是曲面的定长映射，文中总结了定长映射即可展面在平面上展开的基本准则，在这一准则的指导下，结合服装设计与相关领域的要求，讨论了可展面在平面上展开的解析方法与数字方法，上述内容确立了服装设计几何学的基本框架。
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Based on the CAD software UG, the models of centrifugal fans with ruled-surface impeller versus with enveloping surface impeller are developed.
首先本文采用CAD软件UG对直纹面叶轮离心通风机和包络面叶轮离心通风机进行了整体风机三维流场建模和单个叶轮通道的流场建模。
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By using the CFD software FLUENT, the inner-flow field of centrifugal fans with ruled-surface impeller versus with enveloping surface impeller has been simulated. The static pressure distribution, the dynamic pressure distribution, the total pressure distribution, the turbulent intensity and the speed vector of the two kinds of centrifugal fans are then analyzed and compared. From the calculating results, we found that the pressure distribution, the speed vector and other parameters of the two kinds of centrifugal fans are basically same. This implies that the tool-path generating arithmetic for the machining of the impeller can meet the aerodynamic requirements of the centrifugal fan. Furthermore the method can provide proof for designing department to establish sound manufacturing tolerance for impeller.
最后采用CFD软件FLUENT，利用标准k-ε湍流模型，采用分离隐式求解器，分别对直纹面叶轮离心通风机和包络面叶轮离心通风机整体风机内部三维流场和单个通道流场进行了数值模拟计算，在计算结果的后处理中，对相同坐标值处的静压力、动压力、湍流强度和速度矢量等参数进行了分析与比较，结果表明：在相同的计算参数条件下所得到直纹面叶轮离心通风机和包络面叶轮离心通风机内部流场差别不大，从而揭示所采用的叶轮数控加工的刀位规划方法的规划误差对流体机械动力性能的影响不大，这也为设计部门制定合理的叶轮加工公差提供了依据。
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A curve or surface that is tangent to every one of a family of curves or surfaces.
包络线，包络面一条曲线或一个曲面，与一组曲线或曲面中的每一曲线或曲面保持正切
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Mathematics A curve or surface that is tangent to every one of a family of curves or surfaces.
包络线，包络面：一条曲线或一个曲面，与一组曲线或曲面中的每一曲线或曲面保持正切
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The system uses CATIA V5 standard interface and is good of man-computer interaction. Its functions include such basal design graphic tools: driver's comfortable H point, 2D human model establishment, eye ellipsoid, head envelop surface, driver's hand reach etc, and also internal layout based the method of Expert System.Expert System in this paper differs from ordinary design software.
该系统采用CATIA V5标准界面，具有很强的人机对话能力，操作使用方便，其主要内容包括：适宜驾驶员H点、二维人体样板、眼椭球、头廓包络面、驾驶员手伸及界面等车身内部布置的基础设计图形工具，以及基于专家系统方法的车身内部基础布置设计等。
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The results of numerical analysis show that the elastic modular and the poisson ratio have no effect on two-dimensional bearing capacity, but can affect the ultimate bearing capacity of three-dimensional foundations and control the convergence and precision of finite element calculation; the earth pressure coefficient controls the geostatic stress of foundation, sequentially affects the ultimate bearing capacity of foundations and the convergence of numerical calculation. When calculating the ultimate bearing capacity of undrained saturated foundation, the complete formulation exists shear locking, and reduce formulation exists hourglassing, so the hybrid formulation is suitable to imitate the geomaterial. When the soil obeys nonrelevent flow rule, the yielding function is different from potential function, and the elastic-plastic matrix of soil is asymmetric, so the unsymmetry numerical solver and appropriate finite element mesh is required.
研究结果表明，土体弹性模量和泊松比对二维基础极限承载力没有影响，但是影响着三维矩形基础的极限承载力，控制着ABAQUS数值算法的计算精度与收敛速度；地基土压力系数控制着地基土体中的地应力平衡，从而影响着二维条形基础和三维矩形基础的极限承载力和地基破坏包络面；对于不排水饱和软黏土地基，常规的完全积分单元会造成剪力自锁现象，而减缩积分单元则存在过于柔化的现象，故采用杂交单元来模拟较合适；当土体服从非关联流动法则时，屈服函数与塑性势函数之间存在差异，从而导致土体弹塑性矩阵呈现非对称性，在有限元计算中必须采用非对称数值解法，并且合理地划分单元才能对极限承载力进行准确求解。
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In this paper an innovative method for machining sculptured surfaces is presented. By using a disc cutter with a concave end instead of traditional ball-ended or drum-shaped tools, and adjusting the cut- ted axis to swing relative to the component being machined under some special rules, the envelope formed by the trace of the tool-nose may have the same derivative up to the third order as the required theoretical surface.
本文提出了一种加工自由曲面的新方法，即采用中凹的盘形铣刀取代传统的球头或鼓形铣刀，在每一行程中让刀具轴线相对于工件按特定的规律摆动，使得在垂直于进给方向的法截面中，由刀尖轨迹形成的包络面与理论曲面的法截线具有相同的1～3阶导数，从而在保持精度不变的前提下，使实际行程次数得以大幅度的减少。
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Does spiral movement synchronously,a nonlinear model was established by neural networks to describe the relationship between the helical groove and the milling cutter'sprofile,and according to the helical groove axial cross section to simulate the milling cutter's profile.
加工螺旋槽时，针对铣刀刃形的设计，应用包络面原理，采用神经网络方法建立了工件螺旋槽形与铣刀刃形之间的非线性关系模型，并通过工件螺旋槽端面截形模拟仿真出铣刀回转面刃形。
- 更多网络解释与包络面相关的网络解释 [注：此内容来源于网络，仅供参考]
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convolute bedding：包卷层理
包含结构|poikilitic texture | 包卷层理|convolute bedding | 包络面|enveloping surface
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enveloping ring：包络环
enveloping algebra 包络代数 | enveloping ring 包络环 | enveloping surface 包络面
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enveloping surface：包络面
envelope delay 群延迟 | enveloping surface 包络面 | environment 环境
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enveloping surface of folds：褶皱包络面
envelope 包络层 | enveloping surface of folds 褶皱包络面 | environgeology 环境地质学
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envelope surface ;enveloping surface：包络面
包甲电缆|armored cable | 包络面|envelope surface ;enveloping surface | 包皮软管|armoured hose
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enveloping space surface：包络空间(面)
包络环 enveloping ring | 包络空间(面) enveloping space surface | 圆外旋转线 epicycloid
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Envelopment：包封
enveloping surface 包络面 | envelopment 包封 | environgeology 环境地质学
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Data envelopment analysis：数据包络分析
数据包络分析(Data Envelopment Analysis)是著名运筹学家A.Charnes和W.W.Cooper等学者在"相对效率评价"概念基础上发展起来的一种新的系统分析方法. 其主要思路在于通过对决策单元(DMU)进行线性组合构造有效前沿面,
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Mohr envelope：穆尔包络线
莫荷不连续面,莫氏不连续面 Mohorovicic discontinuity | 穆尔包络线 Mohr envelope | 六水铁铵矾 mohrite
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Planar double-enveloping worm gearing accuracy：平面二次包络环面蜗杆传动精度
平面二次包络环面蜗杆减速器系列、润滑和承载能力 Planar double-env... | 平面二次包络环面蜗杆传动精度 Planar double-enveloping worm gearing accuracy | 平面二次包络环面蜗杆减速器技术条件 Planar double-envel...