| 1. | To determine these functions , a slender bar of the medium under investigation is subjected to a single mechanical transient and the resulting wave is observed
从这两项可以演变出材料的复杨氏模量以及其他的一些等效的粘弹性函数。 |
| 2. | It is being focused on by hydro - electric engineers because accident always happened in the period of hydro - mechanical transient despite of its short period
运行实践表明，虽然过渡过程历时较短，但是电站的事故往往发生于水力?机械过渡过程中。 |
| 3. | Study of hydro - mechanical transient is crucial in design and operation of hydroelectric power plant and the development of computation software is always the hot point in hydroelectric engineering field
水力?机械过渡过程对水电站的安全性和经济性均有重要意义，其计算软件的研发也一直是水电工程界的热点问题。 |
| 4. | 4 . the software has been used for a project to form and modify computation model of hydro - mechanical transient , and the correctness of the software is confirmed . the results show that the objectives proposed above are achieved
举出实例，根据软件开发要求，对用图形界面形成的有压过水系统进行修改，然后输出相关数据文件，对比两个修改前后的模型之间的差异，验证软件开发的正确性。 |
| 5. | Based on the status of research on the software now existing , the author has developed a graphical interfaces based software which can form automatically hydro - mechanical transient , computation model for hydroelectric power plant with different water conveying system
本文根据自动形成水力?机械过渡过程数学模型软件的研究现状，着眼于有压过水系统的主要结构形式，借鉴相关软件的开发经验，研制开发了一套基于图形界面的自动形成水力?机械过渡过程数学模型应用软件。 |
| 6. | Ln power system full dynandc simulation , the electric - mechanical transient processes of dynamic elements of power system should be simulated in detail , and the detailed dynandc models of mid - term and long - term processes are necessary based on the research and analysis for the ndd - term and long - term models , the dynandc models , such as thermal power plant , hydraulic power plant , nuclear power plant and the automatic generation control ( agc ) , which are necessary to power syst
电力系统全过程动态仿真除了需要详细模拟电力系统动态元件的机电暂态过程外，还要有详细的中长期过程的模型。本文在综合调查和分析的基础上，研究了电力系统全过程动态仿真所需要的火电厂动力系统的数学模型、水电厂动态模型、压水堆核电站模型以及自动发电控制（ agc ）模型及其算法，并在电力系统全过程动态仿真软件中得到了实现。 |
| 7. | Analyzing the main mathematical models and computation methods of hydro - mechanical transient , characteristics and commonness of the mathematical models of water conveying are discussed , and characteristics of the graphical interfaces based - automatic model constructing software such as generality , modifiability , user friendly interface are proposed . 2
在分析水电站水力?机械过渡过程的主要数学模型和计算方法的基础上，研究了有压引水系统数学模型的特点和共性，提出了拟开发的具有图形界面自动建模软件，该软件具有通用性强、易校对性、易修改性、界面友好等特点和要求。 |
| 8. | Furthermore , the newton method can relax the lindt of step size due to convergent l [ ~ condition , llhp * fi ] < l , for the simple iteration method that is used in ll lyi ] < , , for the simple iteration method that is used in , some general electric - mechanical transient simulation programs
同时，牛顿迭代方法对步长力的限制较宽，可以采用较大的步长，从而克服了目前电力系统机电暂态程序中通常采用的简单迭代算法求解微分一网络方程，受迭代收敛条件的限制，积分步长h受限的问题。 |
| 9. | The calculation model of hydro - mechanical transient in existence was deeply studied and the conclusion is that , for kaplan turbine and pelton turbine , neglecting differences of dynamic mater pressure along the turbine spiral case during transient may cause some error in the calculation of pressure rise and speed rise
本文深入研究分析了轴流式和冲击式机组过渡过程计算的现有模型，指出现有模型中对蜗壳(进水管)部分的处理方法会给这两种机组的过渡过程计算带来相对较大的偏差。 |
