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为零的
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  equals zero
    Under the condition that the principal vector of the external force on a particle system at certain time interval equals zero, the relation =0 is formed, which may be used instead of tradition barycentric movement conservation law to solve relevant mechanical problems easily.
    对质点系在某一时间间隔内所受外力的主矢为零的情况下,建立了关系式用该关系式代替质心运动守恒定律可以更方便地解决有关力学问题.
短句来源
    Under the condition that the principal vector of the external force on a particlesystem at certain time interval equals zero, the relation (1/i)转换成sum from i=1 to n(1/i)mi(Δri- vi0t) = 0 is formed, whichmay be used instead of tradition barycentric movement conservation law to solve relevant mechanical problems easily.
    对质点系在某一时间间隔内所受外力的主矢为零的情况下,建立了关系式(sum from i=1 to n)m_i(△r_i-v_(io)t)=0用该关系式代替质心运动守恒定律可以更方便地解决有关力学问题.
短句来源
    When the angular velocity of rigid body in plane motion unequal to zero, we can find a point where acceleration equals zero at any instant.
    刚体以不为零的角速度作平面运动时,在任一瞬时总可以在刚体上找到加速度为零的一点.
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  “为零的”译为未确定词的双语例句
    If the limit case of zero hardening coefficient is further considered, the solution can be transformed to the elastic-nonlinear-viscous one of Hui and Riedel.
    如果进一步考虑硬化系数为零的极限情况,便可退化为Hui和Riedel的非线性黏弹性解.
短句来源
    A Matrix Expression of the Vector Sum of Internal Forces in a Particle System Equals to Zero
    合内力为零的矩阵表示
短句来源
    On the Plenty Reguisite Condition of Zero Relative Velocity of Relatively Still Object
    论相对静止物体相对速度为零的充要条件
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    There are three kinds of tandem cascades: the axialgaP of the first one was zero, the French blade profile of ONERA was seIected. Casting theflow field at five disparate flow tuming angles, and some analysis and comParison werecompleted.
    本文中的串列叶栅包括三种形式:对于轴向间隙为零的串列叶栅,选取的叶型为法国ONERA平面串列叶栅叶型,在不同来流气流转角条件下分别对其流场进行了计算并与实验进行了一系列的对比,同时也检验了串列叶栅网格生成程序和数值计算程序;
短句来源
    According to the experience of tandem cascade with low loss, one tandemcascade with negative gap was designed and the numerical simulation for performance wasdone.
    在上述法国ONERA串列叶栅的基础上,根据低损失串列叶栅的几何优化参数对前后排叶片轴向和周向位置进行了调整,得到了轴向间隙为负的串列叶栅叶型并对其流场进行了计算和分析,还与相应的轴向间隙为零的情况作了一些对比;
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  equals zero
The solution obtained, while not coinciding with the solution for the case of unperforated walls everywhere when the perforation factor equals zero, gives a simple rule for allowing for induction.
      
Within this model, we demonstrate that, in the chiral limit, the pion mass equals zero and the Goldberger-Treiman relation is fulfilled.
      
If magnetization orientation is orthogonal to a layer plane, the exchange constant is always positive at dPd>amp;lt;dc and equals zero at dPd>amp;gt;dc (dc is the characteristic length).
      
It is shown that there exists a voltage at which the velocity equals zero and stable coexistence of two phases is possible.
      
Suppose that the contact point has zero velocity and the projection of the angular velocity to the normal vector of the sphere equals zero.
      
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The paper presents the equation of the stress function for the two dimensional problems of the non-homogeneous isotropic medium, For the plane strain, For the plane stress, the temperature term changes to and The paper then leads to the problem of two mediums. It treats the case with the sudden change of modulus on the interboundary between two regions with different moduli. The stress function for the two sides of the interboundary, should keep and equal, and besides, and The equations of stress function...

The paper presents the equation of the stress function for the two dimensional problems of the non-homogeneous isotropic medium, For the plane strain, For the plane stress, the temperature term changes to and The paper then leads to the problem of two mediums. It treats the case with the sudden change of modulus on the interboundary between two regions with different moduli. The stress function for the two sides of the interboundary, should keep and equal, and besides, and The equations of stress function established together with the interboundary conditions, are the bases for solving problems with non-homogeneous isotropic mediums. The paper also auggests an alternative interboundary equation which satisfies the main jointing condition between two mediums. The stress function can also be applied to the mixed boundary condition problems. On those parts of the boundary, with known displacements, the boundary conditions for stress function can be expressed by: and Together with and being known in the loaded part of the boundary, thus the general boundary conditions for stress function in the mixed boundary condition problems are established. In this paper the author uses the gravity-dams as working example. The gravity-dam with different moduli for dam and foundation is taken as the first example. In another example the foundation is considered as absolutely rigid. The later gives rise of the mixed boundary condition problem. The calculation is done by method of finite fifference using relaxational technique. New relaxational patterns have been set up. The numerical calculations are worked out for the second example. foe results are checked by model grid-tests. The agreement between the calculated and tested rested results shows that the method is applicable to such kind of problem.

本文建立了非均匀介质弹性力学平面问题的应力方程式: 平面应力情况下:平面应力情况下温度项改为 当两个区域的弹性模量有突变时,交界张s的两侧的应力函数除应将及相等外, 并且要求: 根据这些方程式及交界条件建立了应用应力函数解非均匀介质的基楚。同时提出了一个保证 主要连接条件和变形协调的近似方程式。 本文所提的应力函数表达式可以应用到混合边界的平向题题上,在位移给定的条件下的一般 应力函数边界条件为: 及 因而建立了用应力函数解混合边界问题的条件。 本文以重力壩为例进行了具体计算,壩基为绝对刚性。这也是一个有一部分边界位移为零的 混合边界问题,计算使用差分方程及松弛法,为此建立了新的计算样板和松弛样板,计算的结果 和使用网格法试验的结果进行了比较。

In this article various conditions of antiresonances in multi-degree-of-freedom mechanical systems are discussed. The mechanism of antiresonances, in particular the transfer antiresonances, is explained. The results obtained are useful for a deeper understanding of characteristics of mechanical vibrations.

本文讨论了多自由度机械系统中的各种反共振情形.阐明了反共振,特别是传递反共振的物理机理.所得结果有助于深入理解机械系统的振动特性. 所谓反共振指的是弹性系统在某些特定频率的谐和激励作用下,系统某些部位出现谐和反应等于零的情形.换句话说,反共振情形也就是指在某些频率上系统某些部位的动柔度为零.本文就多自由度弹簧质量系统,从理论上导出反共振的一般规律,并给予清楚的物理解释.

In the theory of thin plates, the bending of cantilever rectangular plates has long remained one of the most difficult problems in this field of study As a consequence, the solution now available are all limited to the approximate ones. To mention the authors who have solved this noted problem, there are: L. V. Kantorovich, D. L. Holl, W A. Nash and H. J. Plass, Jr., et. al. The methods they used are either variational methods or the method of difference. In this paper it is attempted to get an exact solution,...

In the theory of thin plates, the bending of cantilever rectangular plates has long remained one of the most difficult problems in this field of study As a consequence, the solution now available are all limited to the approximate ones. To mention the authors who have solved this noted problem, there are: L. V. Kantorovich, D. L. Holl, W A. Nash and H. J. Plass, Jr., et. al. The methods they used are either variational methods or the method of difference. In this paper it is attempted to get an exact solution, which satisfies both the differential equation and the complicated boundary conditions including the free corners.

在薄板理论中,悬臂矩形板的弯曲,长期以来是个难题,因而,现有的解均属于近似解,如列出几位曾解过这问题的作者,可提到L.V.Kantorovich,D.L.Holl,W.A.Nash,H.J.Plass,Jr.等.他们所用的方法为变分法或差分法.本文将作出一个精确解.它满足微分方程及复杂的边界条件,包括自由角点条件.在我们的方法中,用了叠加法及广义简支边这概念.它的特点是:沿边各点的弯矩为零,但挠度是存在的,因而要满足自由边的条件.只须消除剩余的剪力.顾及自由角点的位移,只须叠加符合要求的一些简单的弯曲面方程.所得的结果与近似解很好地核对,充分证实了现在这解是正确的.

 
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