| 1. | The main steam pipe ' s residual life assessment is investigated in chapter 5
第五章为主蒸汽管道寿命预测研究。 |
| 2. | The main steam pipe ' s failure pattern is discussed and analyzed in chapter 2
第二章为主蒸汽管道失效形式分析。 |
| 3. | The procedure of the main steam pipe ' s failure analysis is investigated in detail in chapter 3
第三章为主蒸汽管道失效分析研究。 |
| 4. | With the dynamic equation of the piping , the dynamic characters of the simple tube and the main steam piping is analysed
给出了系统运动方程。并对简单管道及主蒸汽管道进行分析。 |
| 5. | It is concluded that the residual life of the main steam pipe serviced over 10 x104 hours could reach 9 x 104 hours with eliminating the material defects and the structural defects
预测分析武汉理工大学硕士论文一表明：在消除阀体的材质和结构缺陷后，主蒸汽管道的剩余寿命为9万小时。 |
| 6. | The actualities and development of main steam pipe ' s failure analysis and residual life predication are analyzed systematically from many engineering failure cases in chapter 1 . thereby the direction and the contents of the research are decided in the research program
第一章绪论主要是从大量主蒸汽管道失效实例着手，系统分析了主蒸汽管道失效分析与寿命预测研究的现状和进展，从而确定研究方向和内容。 |
| 7. | With the steep increase of power needed and complicated mechano - electronic structure , it is important to strengthen failure analysis and precaution . main steam pipe is one of the key components in a power plant , whose creep capability is defined as design criteria
随着我国对电力需求的日益增长以及机电设备的复杂化，相应的对机电设备可靠性和安全性的要求越来越高，开展机电设备的失效与预测分析对提高企业的经济效益和技术管理水平具有十分重要的意义。 |
| 8. | The serious bursting accident of the main steam pipe was analyzed 3 by applying the research results above in chapter 4 . the main steam pipe has serviced for 12 x 104h in the power plant . using scanning electron microscope ( sem ) , x - ray diffraction , optical microscope ( om ) , mechanical experiments , it is verified that the main reason causing the main steam pipe breaking down were the material and structural defects
采用扫描电镜技术、 x射线衍射技术、金相观察、机械性能测试等技术手段和失效分析方法，以某火力发电厂己服役12万余小时的主蒸汽管道为例，对其严重的爆断事故进行了失效分析，确定了管道失效的主要原因是与管道焊接的阀体存在大量的材质缺陷和结构缺陷。 |
| 9. | By combining with an engineering practice , the failure pattern , the procedure and the method of failure analysis , the influential factors of service life and the methods of residual life predication of the main steam pipe are investigated systematically in the dissertation . so preventing accident and decreasing damage can be reached
本文作者结合工程实例，对主蒸汽管道的失效模式、影响运行寿命的主要因素以及寿命预测的方法进行了较为系统的分析，为发电厂主蒸汽管道的寿命管理提供了理论依据和分析方法，以达到预防和降低事故、减少损失的目的。 |
| 10. | In order to obtain the correct judgment of main steam pipe conditions , the studies combined with the engineering practices were carried out . on the basis of the integration , the procedures and the methods of the main steam pipe ' s failure analysis are constituted . in order to avoid the confusion , the disorder , the repetition , the omission and the limitation , each mechanics is studied in detail
为了获得对失效事故确切无误的综合判断，必须将科学研究和工程实践有机地融合，在此基础上研究制定出主蒸汽管道失效分析的步骤和方法，并对所涉及的具体技术细节进行了分析，从而避免失效分析工作出现杂乱、重复、遗漏和局限。 |
