rod-drop method

Conventional method is that using level together with leveling rod, or utilizing Global Positioning System combined with leveling rod to pass the absolute elevation reading from on land control points to points underwater.

传统的测量方法是使用水准仪或GPS配合尺杆将绝对高程值由陆域高程控制点传递到水下待测点。

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Digital simulation study of positive period method for control rod calibration in a fast test reactor

正周期法刻度堆控制棒的数字模拟研究

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The reactivity equivalence of 8 groups ( 49 clusters) was calibrated. The integral worths were measured separately by rod changing method, taking the temperature adjuster rod bank as the known differential worth of rod bank.

以温度调节棒组作为已知微分价值的棒组，对8组共计49束的反应性当量，用换棒法作了积分价值测量。

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The results of research in this article would provide a theoretical and arithmetic method for the fluid-structure interaction analysis of the rotary slender shaft, the stirring shaft in the chemical engineering machinery and the rod string and drill string in the oil drilling and production engineering.

本文研究成果可为化工机械中的细长旋转轴和搅拌轴、石油钻采工程中的抽油杆柱和钻柱的固液耦合分析提供了理论基础和计算方法。

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Base on Rayleigh-Ritz method, a calculation formulation of action effect increment of a prestressed horizontal tension rod is firstly presented.

根据瑞利&李滋法，对先张法预应力吊车梁首次提出了预应力水平拉杆作用效应增量的计算公式。

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By using the bifurcation theory of dynamic system and the method of numerical simulation of differential equation, the model of compressible elastic rod has been studied.

用动力系统分支理论和微分方程数值算法研究了压缩弹性杆模型。

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Integrating with the research results of testing method of main body and both ends of sucker rod, the paper also dissertates the research of no-blind testing system for sucker rod.

结合杆体和过渡区检测方法研究的结果，系统阐述了抽油杆无盲区检测系统的设计方法。

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The rigidity calculation of the closed thin-walled section rod structure of aircraft is carried out by using finite element method and the result tallies with the full-scale test value well.

利用有限元法对飞机闭合薄壁剖面杆结构进行刚度计算，其结果与全尺寸试验值吻合较好。

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The relation between coupling ratio of 1 × 7 tapered mixing-rod POF couplers and the length of tapered rod waveguides through numerical simulation by ray tracing method is given.

利用光线追迹法进行数值仿真得到了锥形混合棒塑料光纤耦合器的分光比与其长度的关系。

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The influence of the oil hole on small end of connecting rod has been analyzed with the finite element method on two projects: the small end of connecting rod with an oil hole and the small end of connecting rod with double oil holes.

采用有限元方法对两种不同方案的连杆小头油孔（单油孔方案和双油孔方案）进行了分析。

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