基于模糊数学方法的连轧管机安全评价研究

发布时间：2018-09-11 13:23

【摘要】：钢铁行业是我国工业基础,是国民经济的命脉,尤其是无缝钢管质量的高低关系到国防、制造业和社会经济的健康发展。连轧管机是制造无缝钢管常见的机械设备,连轧管机在无缝钢管生产过程中,系统故障的发生概率高,存在的危险源多,且影响因素复杂,严重影响了产品质量,降低了连轧管机工作效率。因此,采用模糊数学的方法对连轧管机危险源分析、故障树分析以及对系统进行安全评价对提高系统的安全性和产品质量具有重要的意义。针对连轧管机的安全问题,本论文主要工作有:(1)通过查阅现有的文献资料,分析国内外对连轧机安全评价和模糊数学理论等方面研究进展,得出了本论文研究内容与研究思路。(2)对连轧管机组成部分和工作原理进行了分析,并结合连轧管机实际和危险源辨识基本理论,采用预先危险性分析方法,对连轧管机及其相关设备中存在的危险源进行分析,评价其导致事故发生的可能性,确定导致事故的严重程度,提出对应控制技术与措施。(3)在模糊数学理论和故障树分析法的基础上,通过现场考察和对现有企业资料的查阅,以液压辊缝控制(Hydraulic Gap Control简称HGC)系统典型的故障为研究对象,建立连轧管机的“伺服系统失效”故障树。对故障树进行定性分析,得出了结构重要度参数;采用模糊数学理论和专家经验法,研究了确定基本事件发生模糊概率值的方法。(4)在上述研究的基础上,结合使用层次分析法、模糊综合评价法和能力成熟度模型,以现有的安全标准化评审标准为基础,采用问卷调查的方式确定了模糊隶属度,对连轧管机的整体安全管理状况进行综合评价,并给出了对应的建议与措施。
[Abstract]:Iron and steel industry is the foundation of industry and the lifeblood of national economy, especially the quality of seamless steel pipe is related to the healthy development of national defense, manufacturing industry and social economy. Continuous rolling pipe mill is a common mechanical equipment for manufacturing seamless steel pipe. In the production process of seamless steel pipe, the system failure probability is high, there are many dangerous sources, and the influence factors are complex, which seriously affect the product quality. The working efficiency of continuous tube mill is reduced. Therefore, it is of great significance to use fuzzy mathematics method to analyze the hazard source, fault tree analysis and safety evaluation of the system to improve the safety of the system and the quality of the product. The main work of this paper is as follows: (1) through consulting the existing literature, the research progress on safety evaluation and fuzzy mathematics theory of tandem mill at home and abroad is analyzed. The research contents and research ideas of this paper are obtained. (2) the components and working principles of continuous tube mill are analyzed, and combining with the basic theory of pipe mill and hazard source identification, the method of pre-hazard analysis is adopted. This paper analyzes the dangerous sources existing in the continuous rolling mill and its related equipment, evaluates the possibility of the accident, and determines the severity of the accident. The corresponding control techniques and measures are put forward. (3) on the basis of fuzzy mathematics theory and fault tree analysis, the typical faults of hydraulic roll gap control (Hydraulic Gap Control (HGC) system are studied by field investigation and reference of existing enterprise data. The failure tree of servo system for continuous tube mill is established. Through qualitative analysis of fault tree, the structural importance parameter is obtained, and fuzzy mathematics theory and expert experience method are used to study the method of determining the fuzzy probability value of basic events. (4) on the basis of the above research, the analytic hierarchy process (AHP) is used. The fuzzy comprehensive evaluation method and the capability maturity model, based on the existing safety standardization evaluation criteria, are used to determine the fuzzy membership degree by questionnaire, and the overall safety management condition of the continuous rolling mill is comprehensively evaluated. The corresponding suggestions and measures are given.
【学位授予单位】：南华大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TG333.8

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