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displacement constraint
相关语句
  位移约束
     RELIABILITY ANALYSIS OF STRUCTURAL SYSTEMS WITH DISPLACEMENT CONSTRAINT
     有位移约束结构的可靠性分析
短句来源
     EXIST-NULL COMBINATION METHOD FOR THE TOPOLOGICAL OPTIMIZATION OF TRUSS WITH STRESS AND DISPLACEMENT CONSTRAINT
     应力和位移约束下桁架拓扑优化的有无复合体方法
短句来源
     Nodal Displacement Constraint and Release in FEM
     有限单元节点位移约束与释放
短句来源
     Meeting all the conditions of jacking tool's transitionstate carrying capacity, internal force, and displacement constraint, this method arrives pre design state and solves the question of cable in construction period.
     该方法能够在满足所有中间状态张拉工具的承载能力、内力和位移约束条件下,达到预先给定的设计状态,解决了缆索承重结构施工控制中的一个困难问题。
短句来源
     The time spectrum is discreted with the Newmark difference scheme. The displacement constraint equations (holonomic constraints) are expanded according to the Taylor progression and resolved iteratly along with the dynamic equations and velocity constraint equations (nonholonomic constraints).
     该法将时间按照Newmark差分格式进行离散化 ,位移约束方程 (完整约束 )按照泰勒级数展开 ,与动力学方程及速度约束方程 (非完整约束 )组合进行迭代求解。
短句来源
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  “displacement constraint”译为未确定词的双语例句
     The paper presents the joint model of the same displacement constraint, which enriches and develops the FE approaches of simulating joint.
     提出了同位移约束的接缝模型,丰富和发展了接缝的有限元模拟方法;
短句来源
     A new zigzag method for the optimization of plate structures is proposed and optimumcriteria for plate structures with a singal displacement constraint from Kuhn-Tucker condi-tions are derived.
     利用Kuhn-Tucker条件,导出了以板厚度为设计变量的单位移约束板结构优化准则,提出了板结构优化齿行法,导出了相关公式。
短句来源
     In this paper,the concepts of tectonic stress field inverse with geodetic data are described. The reasonableness for surface displacement constraint on the inversion of tectonic stress field is discussed in mathematical model and simulated computation,and the effects of elastic medium constants on the computing results of field are also analysized.
     讨论了大地测量反演构造应力场的概念,分析了地表位移值作为构造应力场反演的约束条件的合理性,以及介质参数对构造应力场结果的影响。
短句来源
     Hence the critical point of the numerical simulation of soil-structure interac tion lies in how to process the above nodal displacement constraint conditions.
     因此 ,土 -结构相互作用整体有限元数值模拟的关键在于如何较好地反映由于土中结构体刚度条件而导致的、对周围土体变形所施加的一种约束条件。
短句来源
     This paper developed a three dimension finite element model to analyze stress distribution on residual limb of crus under lumped loads with different displacement constraint conditions.
     通过建立三维线性有限元模型来分析在集中载荷作用下小腿肢体残端的应力分布 ,且分析了不同边界条件对肢体残端应力分布的影响。
短句来源
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  相似匹配句对
     Nodal Displacement Constraint and Release in FEM
     有限单元节点位移约束与释放
短句来源
     RELIABILITY ANALYSIS OF STRUCTURAL SYSTEMS WITH DISPLACEMENT CONSTRAINT
     有位移约束结构的可靠性分析
短句来源
     On Liability Constraint
     略论责任约束
短句来源
     Constraint of Powers
     论权力制约
短句来源
     DISPLACEMENT CURRENT
     位移电流
短句来源
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  displacement constraint
It is shown that this condition reduces to an equal displacement constraint along the line of action of the forces.
      
The classical critical load constraint against global instability is given with numerical advantage by a new method using a displacement constraint.
      
Our primal goal (upper-level) is to satisfy the displacement constraint as well as possible - we minimize the gap between the actual and prescribed displacement.
      
The displacement constraint values are specified based on the measured experimental modal displacement data at critical locations.
      
A set of equivalent static inertia forces are obtained from the vibration analysis using d'Alembert's principle and are used to solve the multiple displacement constraint problem.
      
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In analysing the stresses of a structure by finite element method, it is necessary to deal with various boundary constraints. Based on the discussion of some boundary constraints in common use, a general method for processing various displacement constraints is suggested and its corresponding program is presented.

采用有限元法进行结构应力分析时,经常要处理各种边界约束。本文在讨论一些常见约束的基础上,提出了一个处理位移约束的一般方法,并给出相应的通用程序 采用有限元法对结构作应力分析时,经常会遇到各式各样的约束条件。在实际计算中,必须对约束条件的处理给予足够的重视,若处理不当,将不可能获得符合实际的结果,甚至使结构的法方程出现奇性,计算进行不下去。有限元法的重要特点之一就是计算格式统一,无论刚度矩阵与荷载向量的形成,还是方程求解与应力计算,都具有统一的计算法则,便于编写通用计算程序。关于对称稀疏矩阵的紧缩存贮和大型线性方程组的分块求解方法已趋于成熟,但关于约束条件的处理,尽管各类文章针对具体约束的讨论不少,却还没有一种处理任意约束形式的统一方法。本文的目的是对一些常见的约束进行讨论,然后提出一个处理位移约束条件的一般方法,并给出相应的通用程序。

Using a kind of ceramic electrodes and two kinds of metal electrodes as examples this paper describes governing equations for solving the temperature field and stress field of JS-2 MHD generator electrodes and gives relevant thermal boundary conditions and displacement constraints. It is indicated that because of the presence of strong magnetic and electric field in the MHD generator channel the Hartmann effect and the laminarization of gas decrease, the convective heat transfer, whereas the Joule heating...

Using a kind of ceramic electrodes and two kinds of metal electrodes as examples this paper describes governing equations for solving the temperature field and stress field of JS-2 MHD generator electrodes and gives relevant thermal boundary conditions and displacement constraints. It is indicated that because of the presence of strong magnetic and electric field in the MHD generator channel the Hartmann effect and the laminarization of gas decrease, the convective heat transfer, whereas the Joule heating increases it. The effects of these factors on the convective heat transfer coefficient can be calculated with fomulas given in this paper. Also considered was the radiant heat transter from the plasma to the electrode walls. As an internal heat source the Joule heat of the current through the electrode was calculated. On the basis of theoretical analysis and experimental measurements the profile of the current density along the X direction can be expressed as an exponential function of X. The, finite clement method was used for the calculation of the temperature, field and stress field. Since the physical properties of electrode materials are the functions of temperature the iteration was used in order to calculate the temperature: profile idenhical with that used fo calculating the physical properties of electrode materials. The thermodynamic properties and flow conditions of combustion gas were calculated on the bases of calculation of combustion gas composition and quasi-one-dimensional model of the MHD channel. The calculated profiles of isothermal and thermal stress in the electrodes can be used as the bases for analysing the rationality of the electrode structure and for improving the electrode design.

本文以JS-2磁流体发电机的一种陶瓷电极和二种金属电极为例,从工程角度描述了求解电极温度场及热应力的控制方程。给出了相应的热边界条件和位移约束条件。文中特别指出,由于通道中强磁场和强电场的存在,一方面由于哈特曼效应和气流分层化使燃气向通道壁的放热系数减小,另一方面由于附面层内电流的焦耳热使放热增强,其对流放热系数的修正由数学关系式给出。文中并根据理论分析和实验结果对电极内部由于非均匀分布的电流的焦耳效应作了讨论,确定电流沿壁面按指数规律分布,其焦耳效应作不均匀内热源计入运算。对导电燃气和电极壁面热辐射对应的放热系数文中也作了估计。文中的计算采用有限单元法进行。材料的物性认为是随温度变化的函数。用迭代方法达到温度分布与选取物性的耦合。燃气热力性质和流动状态系依据燃气组分计算及通道准一维计算的结果。文章计算结果给出了电极上的等溫线分布和热应力分布。为分析电极结构的合理性和进行新电极的设计提供了理论依据。

In this paper, a highly nonlinear optimum design problem of the reinforced concrete frames are treated in two level in accordance with the global constraints and the local constraints, respectively, and iterations are proceeded in each level. In the first level, the most flexible structure among those satisfying the global constraints (such as displacement constraints), size constraints, etc, is sought under the most unfavourable horizontal loads. In the second level, on the basis...

In this paper, a highly nonlinear optimum design problem of the reinforced concrete frames are treated in two level in accordance with the global constraints and the local constraints, respectively, and iterations are proceeded in each level. In the first level, the most flexible structure among those satisfying the global constraints (such as displacement constraints), size constraints, etc, is sought under the most unfavourable horizontal loads. In the second level, on the basis of the first level, the most economical structure satisfying all local constraints such as thost of strength, sizes, percentage of reinforcement and all other code requirements will then be obtained.

本文将具有高度非线性的钢筋混凝土平面框架的优化设计问题按照整体性约束与局部性约束分成两级处理,各自进行迭代计算:第一级选择一个在最不利的水平荷载作用下满足整体性位移约束条件以及尺寸等其它约束条件的最柔结构;第二级再在第一级的基础上选择满足局部性的强度、配筋率、尺寸及其它规范要求的约束条件的造价最低的结构。

 
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