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边界待定
相关语句
  unknown boundary
     The moving coordinate iterative method is used to analyze unknown boundary and geometricnonlinear forces and deformations of drillstring in annulus.
     应用动坐标迭代法分析环空钻柱的边界待定问题与几何非线性受力变形问题。
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  “边界待定”译为未确定词的双语例句
     By using finite element theory, the dynamics problem of drill string in a large deflection well and the unknown dynamic contact boundary problem of the drill string were solved by combining Wilson- method with Newton-Laphson method and loosing constraint method.
     采用有限元理论 ,将威尔逊θ法、牛顿拉裴逊法和放松约束试算法相结合 ,解决了大位移井钻柱动力学问题及钻柱动态接触边界待定问题。
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  相似匹配句对
     Boundary thinking
     边界沉思
短句来源
     Their structures are about to be determined.
     结构待定
短句来源
     The penalty function method is applied for finding the unknown boundary.
     采用罚函数法处理待定边界问题。
短句来源
     Boundary of Arts
     艺术的边界
短句来源
     The unknown integration constants in the general solution can be determined by means of the boundary conditions.
     然后利用边界条件确定通解中的待定常数。
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  unknown boundary
The problem arising for the Laplace equation in a region with an unknown boundary has been discussed previously in a somewhat different physical interpretation in [2].
      
A class of plane problems for which the resulting boundary-value problem with an unknown boundary is effectively solved is identified.
      
At the same time, the approach proposed makes it possible to identify new, previously unknown boundary extrema.
      
The uniqueness theorem for the solution to this inverse problem is proved, and a method for the reconstruction of unknown boundary conditions is indicated.
      
An approximate formula for the determination of unknown boundary conditions from three natural frequencies is obtained.
      
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The parametric vanational principle (PVP) is powerful to solve the nonlinear unspecified boundary problems in continuum mechanics. By the PVP, this paper studies the elastic-creep-damage problem. The proposed principle, a development of optimum control theory, is to minimize a constructed potential energy functional under the constrained conditions which are converted from the creep-damage equations. The mathematical proof of principle is given. Also, the paper quotes the results of creep experiments of 2.25Cr-lMo...

The parametric vanational principle (PVP) is powerful to solve the nonlinear unspecified boundary problems in continuum mechanics. By the PVP, this paper studies the elastic-creep-damage problem. The proposed principle, a development of optimum control theory, is to minimize a constructed potential energy functional under the constrained conditions which are converted from the creep-damage equations. The mathematical proof of principle is given. Also, the paper quotes the results of creep experiments of 2.25Cr-lMo steel at 550℃ to show an application of the proposed principle. The principle is easy to be put into practice by computer.

参变量变分原理是近年来发展的用于处理数学物理问题中边界待定边值问题的一种有效方法,本文建立起用于蠕变损伤问题结构分析的参变量变分原理,该原理将原问题化为求解带约束条件的泛函极值,其约束条件就是由蠕变损伤本构关系推导出的系统状态方程组;该原理物理意义明确、表达式简单并且规范,容易为计算机实现。本文给出原理的证明,并就2.25Cr-1Mo钢在550℃下的蠕变问题给出实例。

The moving coordinate iterative method is used to analyze unknown boundary and geometricnonlinear forces and deformations of drillstring in annulus. The friction is in troduced in theequilibrium calculation. The models of the tri-dimentional analysis are derived.It is shown bycomputation that the method and the models are simple,convenient and reliable and thecomputation can be simplified by the method in practical applications.

应用动坐标迭代法分析环空钻柱的边界待定问题与几何非线性受力变形问题。将摩擦引入平衡计算中,导出了三维分析模型。计算说明该方法和模型简便可靠,实际应用可以简化计算。

The paper gives a description of the inverse geodetic boundary value problem(GBVP) in a shell domain. As contrast to the tradihonal GBVP whose aim is to determine the shape of the earth and its external gravity field, the aim of the inverse GBVP in a shell domain is to determine the geoid. Because the geoid is partially located inside the earth,to obtain the density distribution outside the geoid is a prescription. The physical and mathematical model of the inverse GBVP in a shell domain is discussed, and its...

The paper gives a description of the inverse geodetic boundary value problem(GBVP) in a shell domain. As contrast to the tradihonal GBVP whose aim is to determine the shape of the earth and its external gravity field, the aim of the inverse GBVP in a shell domain is to determine the geoid. Because the geoid is partially located inside the earth,to obtain the density distribution outside the geoid is a prescription. The physical and mathematical model of the inverse GBVP in a shell domain is discussed, and its linearization form is given following the tradihonal way. Special mention is given here to the solution of the linearization form and the spectral solution in spherical approximation. If we determine the geoid in this way, it is unnecessary to adjust the masses outside the geoid as well as to take account of the effects of the masses inside the geoid.

从确定大地水准面实际出发,提出环域大地逆边值问题.文中首先建立环域大地道边值问题的数理模型.由于环域内边界待定,属自由边界,本质上是非线性问题.循传统给出环域逆边值问题的线性化形式.重点讨论并构造了线性化问题的解式,包括谱域内的解.

 
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