查询词典 finite dimensional operator

Double Ring Reducer ; Finite Element Method ; Contact ; Fault Characteristics ; Fault Diagnosis.

国家自然科学基金；国家高技术研究发展计划(863计划)双环减速；有限元；接触；故障特征；故障诊断

Based on the basic theoryof non linear finite element, the author of the paper set up the double non linearfinite element equation based on the updated Lagrangefor mutations forthe 8-node degenerate shell element and considering the nonlinear of geometryand the nonlinear of materials.

本文根据非线性有限元的基本理论，采用基于修正的拉格朗日法描述的八节点超参数壳体单元，考虑几何非线性和材料非线性，推导建立了双重非线性有限元方程，结合混合强化本构关系，编制了非线性有限元计算程序。

A nonlinear finite element model is constructed, considering the large deformation, large strain, bolts pretension, bolt contact-slide, as well as material harden and soften, and Miese yield criterions and double nonlinear 3-D element are adopted, so it can predict performance of beam-to-column web connections under cyclic loads.

本文考虑大变形、大应变、螺栓预拉力及螺栓处的接触滑移、材料的强化和软化，采用Mises屈服准则、双重非线性空间单元，建立的非线性有限元模型能够比较精确地模拟梁柱腹板连接在循环荷载作用下的受力性能。

With the narrow bandwidth of microstrip antenna, a microstrip antenna with the substrates of double negative media is designed by the software HFSS which is based on finite element method.

针对微带天线带宽较窄的问题，采用基于有限元法的HFSS软件，设计1种以双负材料为衬底的微带天线。

Bridge deck over lay structure of Yamen Bridge is analyzed through finite element method according to the character of double towers and single cable plane.

针对崖门大桥的双塔单索面斜拉桥结构特点，对桥面铺装层结构进行了有限元力学分析，总结了铺装层结构变形特点及性能要求，指导铺装层的设计施工；介绍桥面铺装沥青混凝土设计，及高粘度沥青混合料的施工过程和特点。

In order to test the efficient and possibility of the method, main vibration features about space double layer has been calculated based on this method, comparing this with the precise solution of finite element method,...

为检验这种方法的有效性和可行性，用这种方法计算了空间双层子结构的主要振动特性，并将所得结果与有限元精确解进行对比，表明了这种方法不仅适用于简单对接情况也适用于高度赘余连接的情况，并且具有良好的综合精度。

A rational method of disposal for a the dowel bar is proposed through test-in-place and finite element analysis.

提出了传力杆的合理布置方式，并通过现场试验和数值模拟进行了分析和验证。

By means of the K-ε turbulence model and finite element method, the flow of the fluid in the valve and the piston during a cycle of pumping is simulated and calculated. The motion law of the crude oil in the valve passage and concentric annulus in the upstroke and downstroke is analyzed.

针对杆式泵泵简内的流体流动问题，采用湍流模型的K-ε两方程模型和有限元方法，对在一个抽油循环中阀与活塞在几个特定的位置的流体流动进行了建模与计算，具体分析了处于阀道内和同心环状空间中的原油在上下冲程的运动规律。

Keywords: FEA; Strength analysis of drill chuck; Finite element modeling; Contact analysis; Parametric design; APDL

关健词：有限元；钻夹头强度分析；有限元建模；接触分析；参数化设计；APDL

Based on the idea of the structure parametric design method, the parametric finite element model of drill chuck with complicated spiral surface character was established.'The related key technologies of drill chuck's strength analysis were discussed and solved, such as the contact analysis parameters selection, the boundary conditions and the load processing, ANSYS command一string building and so on.

本文采用结构参数化设计方法建立了含有复杂螺旋曲面特征的钻夹头参数化有限元模型；探讨和解决了钻夹头夹紧强度分析中夹爪与螺母接触分析参数的选择、约束边界和载荷处理、分析流程文件创建等关键技术问题。

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This new product will become our best seller.

这个新产品会成为我们最畅销的产品。