【作者】 郑昌盛；

【导师】 龙伟；

【作者基本信息】 四川大学 ， 机械制造及其自动化， 2005， 硕士

【摘要】 压力容器在制造和使用过程中会产生各种各样的缺陷,对这些缺陷进行测量并做出安全评估是进行安全生产的重要工作。随着压力容器使用年限的延长,安全问题更加突出,并且在每年例行的安全检查中,会积累大量的检测数据。如何利用过去多年中的检验检测技术数据、资料和经验积累,较为准确地了解、掌握其现状以及今后一段时期内的使用安全性,使在将来的使用中能更有效地提高安全评定的可靠性,更加有效地预防事故的发生,这是一个重要的研究课题。 本文针对以上需求,研究了在役压力容器缺陷数据库及评定决策支持系统的结构体系。所建立的缺陷数据库实现了对历史积累的数据进行有效地组织和管理,并为下一步的数据处理、分析提供数据库支持。在建立数据库的基础上,依据《压力容器缺陷评定规范》(CVDA-84)、《在役含缺陷压力容器安全评定规程》(SAPV-95)和R6规范对缺陷数据进行分析计算,做出缺陷的安全评定图。在评定计算分析的结果上,综合运用计算机技术、管理科学、模糊数学、人工智能技术等理论,综合考虑容器的缺陷数、材料性能、焊接性能、容器的使用状况等,对压力容器的使用状况做出综合评价。 本文在充分分析安全评定技术、深入分析功能需求的基础上,提出了基于数据库的评定系统方案,包括结构设计、评定功能模块设计、数据库设计、系统实施等方案设计。软件是在Windows 2000平台下,利用VB6.0编写应用程序,SQL SERVER 2000建立后台数据库。本系统具有广泛的应用前景和较高的使用价值。更多还原

【Abstract】 The pressure vessel will produce various defects in the course of making and using, so it is necessary to measure and assess these defects. With the extension service life of the pressure container, the safe problem is more outstanding. In the customary safety inspection of every year, it will accumulate a large number of measuring data. In order to accurately understand the pressure vessel’s current situation and in one period in the future, improve the credibility of the pressure vessel’s safety assessment work, prevent the emergence of the accident more effectively, we must find a way to efficiently utilize the past year’s inspection data, the technology materials, and safety assessment experience accumulated in the past. This subject is important in the industry producing and is worth to research.This paper has researched the defects database of the pressure container in using with defects and evaluated DSS to the above demand. First, the defect database is set up for organized and managed the accumulated history defects data effectively, and for data processing and safety assessment account. It offers data support to analysis of follow-up. On the basis of the database, and according to " the pressure vessel defects assessment norm " (CVDA-84), " Safety Assessment of the Pressure Vessel -95" (SAPV-95) and R6 norm, we can calculate and analysis the defect data, and can make FAD picture of the defect. In evaluating the result of computational analysis, using such many kinds of science knowledge as technology of the computer, management science, fuzzy mathematics, artificial intelligence technology, etc. Synthetically, consider defect counting, material performance, state of using welding performance, thework situation of the pressure vessel, etc. Then make comprehensive appraisal in state of use for pressure vessel.This paper is on the basis of thorough comprehension on vessel defect’s safety assessment technology, and on the foundation of the thorough analytical function request, then bring out the project design of the assessment system based on database, including structural design, evaluating function module design, design of database, implementing systematically, etc. The software is on Windows 2000 platform, with VB6.0 writing the application program, SQL SERVER 2000 sets up backstage supporter’s database. This system has extensive application prospect and high use value.更多还原