特征线法

There are some means to solve D'Alembert Solution, one of them is eigenvalue means.

该公式的推导方法中一个最基本方法是特征线法。

The mathematical model of the first class control inverse problem with specified pressure is established, which is improper.

对系统的其它管道与水力元件则采用沿空间方向的特征线法进行求解。

To all project practicality, the introduction is given to the operational characteristics, the methods for calculation and the researching actuality of the tail tunnels with sloping ceiling underground hydropower stations the Three Gorges. This paper has discussed in detail the characteristic method being the same with the compressive flow and the Priessmann solution being the same with the free-surface-pressure flow. And how to deal with boundary conditions has been expatiated. Also hydraulic transient process of tremendous load fluctuation in the tail tunnels with sloping ceiling has been numerical simulated and the Fortran program for numerical simulation has been given. The paper gain the maximal press for tail end of the shell, the maximal rising rate of rotational speed of generating set, the maximal vacuum degree for inlet of the tail tunnels and so on under 11 kinds conditions of tremendous load fluctuation. These conditions include the design conditions, the check conditions and the superposition conditions. Finally, the computing results have been analyzed and summarized. The end chapter is the general comment of the whole-length content and the describing of the intending view of researching.

本文以三峡右岸地下电站尾水洞设计为背景，从工程实际出发，阐述了变顶高尾水洞的工作特性、使用范围及其研究现状；详细论述了适用有压流的特征线法、适用明满交替流的普里斯曼解法等数学模型；边界条件的给定和明满交替流的计算方法；用Fonran语言编制了数值计算程序，对三峡右岸地下电站变顶高尾水洞的大波动工况进行了数值模拟，分别得出了在设计工况、校核工况和叠加工况下蜗壳末端最大压力上升值、机组最大转速上升值和尾水管进口最大真空度等重要参数；对数值计算结果进行了详细分析并得出了有价值的结论；最后展望了今后水电站变顶高尾水洞的研究方向。

Water hammer calculation of water diversion system of air cushion surge chamber. Water hammer calculation adopts method of characteristics.

2气垫式调压室引水系统的水锤计算水锤计算采用特征线法。

The method of characteristic theory with Tailor-Make model are presented. By this method, we calculate the flowfield from the shock to the object surface.

本文建立了结合泰勒—麦克尔模型的特征线法理论，即由激波面推算波后流场和物面的计算方法，编制了流场计算程序。

In addition, shock waves may form due to the steepening of pressure waves limiting the use of method of characteristics, usually employed for solving the governing equations.

此外，由于特征线法的局限，压力波的急速变化造成了震荡波的形成。

At first, the Method of Characteristics was applied to aerospike nozzles.

用特征线法对塞式喷管单元进行了大量计算研究，并同实验结果进行了比较。

The variational form of the governing equations is given on the basis of the extended Hu-Washizu three-field variational principle.

基于胡海昌-Washizu三变量广义变分原理结合特征线法给出了控制方程的单元弱形式。

After analyzing factors impacting the water hammer, the paper set up the water hammer mathematic model, apply character line method and ADINA software to solve model.

本文在分析影响水击因素的基础上，建立了水击效应的数学模型，并用特征线法以及ADINA有限元方法对水击数学模型进行了求解。

A characteristic method is used to research into the hydraulic resonance system of a pipe- air chamber ,indicating that with a proper structure parameter and fluid parameter,the system will improve the amplitude of the end-point pressure of the pipe.

采用特征线法对用导管-气室水力共振系统提高脉冲水射流的强度进行了模拟研究，表明水力共振系统在合适的系统结构参数和流体参数情况下，可以提高导管出口处的压力振幅。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。