强流D-T中子发生器n-γ辐射场的MC模拟研究

根据D-T中子源260 keV氘束流能量下的中子能谱和角分布数据,建立了D-T中子源模型,在中子发生器各元件材料及实验大厅墙壁对快中子的慢化、散射和吸收的条件下,采用MCNP模拟程序对强流中子发生器n-γ辐射场进行了模拟研究,得到了中子能谱、中子和γ角分布、n-γ比等重要参数。模拟结果与有关文献实验数据的基本吻合,验证了所建立的MCNP模拟模型的可靠合理。

安装误差对正交弧齿锥齿轮副接触区影响的分析

本文从理论上分析了正交弧齿锥齿轮副的各种安装误差对啮合接触区的单独影响和综合影响,建立了安装误差作用下齿面接触区的数学模型,并通过具体实例讨论了各项安装误差对啮合接触区单独影响和综合影响的程度以及综合影响的“叠加效应”和“互补效应”,提出了满足接触要求前提下降低安装要求的措施.

On the Derivation of Angular Glint from Backscattering Measurements of Echo Relative Phase

From the backscattering measurements of a two-point target consisting of two spheres,we discovered that the backward angular glint can be obtained by evaluating the derivative of the measured data of backscattering echo relative phase versus incident angles. A representative vector model of N-point target consisting of N anisotropic point scatterers has been proposed to reveal the inherent law implied by the experimental phenomenon. Analytical arguments then demonstrate that, under certain conditions the equivalence can be found between the backward angular glint and the derivative of backscattering echo relative phase with respect to incident angles. This work is of particular value in deriving angular glint from backscattering measurement in the case of no bistatic scattering measurement capability.

测量长周期回转波动的陀螺仪法

本文阐述了测量长周期回转波动的陀螺仪法。内容包括陀螺仪法的工作原理、运动方程、测量方法、测量装置及其参数。