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symmetric variable
相关语句
  对称变
     ELEMENT STIFFNESS MATRIX FOR CURVED BARS WITH SYMMETRIC VARIABLE CROSS-SECTION
     对称变截面平面曲杆的单元刚度矩阵
短句来源
  相似匹配句对
     The Mean Inequalies of Symmetric Random Variable
     对称随机变量的平均不等式
短句来源
     The Commutative Random Variable and Symmetric Distribution Function
     可交换的随机变量和对称分布函数
短句来源
     Symmetric Copula
     具有对称性的Copula
短句来源
     On Analysis of Variable
     论变量分析法
短句来源
     On Selection of the Variable
     关于自变量的选择
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  symmetric variable
One case of the explosion of a symmetric variable-thickness surface charge
      


Adopting the step stiffness convert method, this paper treats a curved bar with arbitrarily variable cross-sections as one with step cross-section. By using the analytic solutions of radial displacements of a curved bar with constant cross-sections which are gotten from the differential equation of stability and the general equation of bending moment, with the radial displacements of the converted step cross-sections and the moment of the arch end as the fundamental unknown quantities, it is established that...

Adopting the step stiffness convert method, this paper treats a curved bar with arbitrarily variable cross-sections as one with step cross-section. By using the analytic solutions of radial displacements of a curved bar with constant cross-sections which are gotten from the differential equation of stability and the general equation of bending moment, with the radial displacements of the converted step cross-sections and the moment of the arch end as the fundamental unknown quantities, it is established that the algebraic equation systems for the stability calculation of circular arches and ring with symmetric variable cross-sections and different support constrains under the hydrostatic pressure. Then the characteristic equations, which can enough exactly calculate the critical loads of stability, are obtained.

采用阶梯刚度折算法,将任意变截面曲杆转化为阶梯截面曲杆分析。利用由等截面圆弧形曲杆的稳定微分方程和导出的弯矩方程一般表达式所得到的径向位移解析解,以折算后的阶梯截面径向位移和拱端截面弯矩为基本未知参量,建立了在静水压力作用下不同约束(两铰、无铰和弹性转动约束)支承的对称型变截面圆拱和圆环稳定分析的代数方程组,得到了可以足够精确计算临界载荷的特征方程。算例表明方法简单、有效、实用。

The characteristics of shock wave propagation in non-ideal gas in an axis-symmetric variable-sectional pipe with valve under nuclear explosion were studied, and the effects of ionization and dissociation of air on shock wave propagation were analyzed by numerical results due to the TVD form and time-variant non-uniform mesh. It is shown that the pressure from the wave front have little effect on shock wave propagation in ideal gas, but much effecton non-ideal gas when the model is changed into the non-dimensional...

The characteristics of shock wave propagation in non-ideal gas in an axis-symmetric variable-sectional pipe with valve under nuclear explosion were studied, and the effects of ionization and dissociation of air on shock wave propagation were analyzed by numerical results due to the TVD form and time-variant non-uniform mesh. It is shown that the pressure from the wave front have little effect on shock wave propagation in ideal gas, but much effecton non-ideal gas when the model is changed into the non-dimensional one. The sharper the shape of the incoming shock wave is, the more the energy of the shock wave loses. In the last section, the numerical results are compared with the simulation ones to show the validity of the proposed formula for estimating the value of the flow field and some restrictions of the one-dimensional model are also presented.

研究了核爆炸环境下带活门轴对称变截面管道中非理想气体激波的传播特性 ,并讨论了在其传播过程中电离和离解效应的影响 .通过利用 TVD格式和时变非均匀网格对模型进行的数值模拟表明 ,在理想模型中波前压强的变化不会对无量纲结果产生影响 ,但在非理想模型中却会导致无量纲结果的较大变化 ,而且入射激波的波峰越陡 ,到出口处波峰被抹平的幅度越大 ,活门的消波效果理想 .通过对一维和二维计算结果的比较指出了一维计算的缺陷所在 ,而数值计算和近似估算结果的比较验证了近似估算公式的正确性 .

 
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