安全系统工程培训课件28701.pptx

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1、Safety EngineeringNASAs illustration showing high impact risk areas for the International Space StationSafety engineering is an engineering discipline which assures that engineered systems provide acceptable levels of safety.It is strongly related to industrial engineering/systems engineering,and th

2、e subset system safety engineering.Safety engineering assures that a life-critical system behaves as needed,even when components fail.常用术语危险：hazard安全：safe事故：accident风险：risk灾害：disaster系统：system可靠性：reliability安全分析：safety analysis安全评价：safety evaluationAccident causation models 事故致因理论 Safety management

3、安全管理 Physical conditions 物质条件 Loss prevention 损失预防Top management高层管理人员 Human errors人因失误Hazard control 危险控制Corporate culture 企业文化 Risking taking 冒险行为Safety officer 安全官员 Safety committee 安全委员会 Unionized company 集团公司 Safety principle 安全规则 Status review 状态审查Supervisory level 监督层 Implement plan 执行计划 Haza

4、rd identification 危险辨识 Safety performance 安全性能Systems engineering is an interdisciplinary field of engineering and engineering management that focuses on how to design and manage complex systems over their life cycles.At its core systems engineering utilizes systems thinking principles to organize t

5、his body of knowledge.Issues such as requirements engineering,reliability,logistics,coordination of different teams,testing and evaluation,maintainability and many other disciplines necessary for successful system development,design,implementation,and ultimate decommission become more difficult when

6、 dealing with large or complex projects.System EngineeringSystems engineering deals with work-processes,optimization methods,and risk management tools in such projects.It overlaps technical and human-centered disciplines such as industrial engineering,mechanical engineering,manufacturing engineering

7、,control engineering,software engineering,electrical engineering,cybernetics,organizational studies and project management.Systems engineering ensures that all likely aspects of a project or system are considered,and integrated into a whole.The systems engineering process is a discovery process that

8、 is quite unlike a manufacturing process.A manufacturing process is focused on repetitive activities that achieve high quality outputs with minimum cost and time.The systems engineering process must begin by discovering the real problems that need to be resolved,and identify the most probable or hig

9、hest impact failures that can occur systems engineering involves finding elegant solutions to these problems.System characteristics:Unity整体性 Relativity相关性 Objective,Goal&Function目的性和功能性 Adaptability to the Environment环境适应性 Dynamic动态性 System has its own order有序性Classification of system Natural and Hu

10、man-Made System 自然系统和人工系统Physical and Conceptual System 实体系统和抽象系统Static and Dynamic System 静态系统和动态系统Control and Behavior System 控制系统和行为系统Open and Closed System 开放系统和封闭系统System engineering methodEngineering logicEngineering analysisStatistical theory and probability theoryOperations researchSystem en

11、gineering principle系统原理整分合原理反馈原理弹性原理封闭原理能级原理动力原理激励原理System principlePrinciple of integral-divisionFeedback principleElasticity principleClosure principleEnergy level principleDynamic principleIncentive principleSafety System Engineering1.Features of safety system系统性开放性 确定性与非确定性 有序与无序的统一体 突变性或畸变性Syst

12、ematicnessOpennessCertainty and uncertaintyUnity of order and disorderSudden or abnormal degeneration2.Safety System Engineering Definition 安全系统工程是运用系统工程方法，识别、分析、评价系统寿命周期中的危险性，根据其结果调整工艺、设备、操作、管理、生产周期和投资等因素，控制可能发生的事故，使系统处于最佳安全状态。DefinitionSafety system engineering is a method of using system engineer

13、ing to identify,analyze and evaluate the hazards in the life cycle of a system.According to the results,it adjusts the process,equipment,operation,management,production cycle,investment and other factors to control the possible accidents,so that the system is in the optimal security state.Three subs

14、ystems:Human subsystemsMachine subsystemsEnvironment subsystem3.Research object of safety system engineering These three interrelated,mutually constrained,interactive subsystems constitute an organic whole of a human-machine-environment system.Analysis,evaluation,control human-machine-environment sy

15、stem security,can really solve the system safety issues.4.Research contents of safety system engineering The basic task of safety systems engineering is to predict,evaluate and control hazards.The analysis process can be summarized as follows:System safety analysis(identification and forecasting haz

16、ards);Risk(safety)evaluation(including human,machine,material,craft,environment,organization,etc);Comparison;Comprehensive evaluation;Optimize the decision of the plan.The main technical means can be summarized as system safety analysis,system safety evaluation and safety decision-making and acciden

17、t control.System Safety AnalysisSystem Safety Analysis Through the system safety analysis,you can identify the dangerous sources in the system,analyze the possible dangerous states,estimate the probability of the accident,the possible damage and the severity of the consequences,by modifying the syst

18、em design or change the control system to run the program.main contentInvestigate and analyze the various dangerous sources and their relations in the systemConduct investigation and analysis of system-related environmental conditions,equipment,personnel and other relevant factorsAnalyze measures th

19、at can take advantage of appropriate equipment,procedures,processes or materials,control or eradicate a particular hazard sourceInvestigating and analyzing hazard control measures and the best way to implement these measuresInvestigation and analysis of dangerous sources that can not be eradicated t

20、o lose or reduce the possible consequences of controlInvestigation and analysis of safety hazards in order to prevent injury and loss if the hazard is out of controlCommon method预先危险性分析（PHA）安全检查表分析（SCA）故障模式及影响分析（FEMA）危险和可操作性研究(HAZOP)事件树分析(ETA)事故树分析（FTA)系统可靠性分析（）原因-后果分析（CCA)Preliminary Hazard Analysi

21、sSafety Checklist AnalysisFailure Mode and Effect AnalysisHazard and Operability AnalysisEvent Tree AnalysisFault Tree AnalysisSystem Reliability AnalysisCause Censequence analysisClassification InductionQualitative analysisQuantitative analysisDeduction Preliminary Hazard Analysis(PHA)，是在每项工作活动之前，对

22、系统存在的危险类型、来源、出现条件、到事故后果及相关措施，作一概略分析。总之，即在行动之前作一安全分析，以避免考虑不周造成的各种损失。1、Main content of PHA识别危险的设备、零部件并分析其发生的可能性和条件；Identify dangerous equipment,parts and analyze the likelihood and conditions of their occurrence;分析系统中各子系统，各元件的交接面及其相互关系与影响；Analysis of the subsystems in the system,the components of the

23、intersection and their relationship&influence;分析物质危险性（MSDS，相关的检测）；Analysis of material hazards 分析工艺过程危险性(含装置存在的危险性)；Analyze the process hazard(including the presence of the device)人、机关系(操作、维修等)Human-machine relationship环境条件危险性分析；Risk analysis of environmental conditions防护措施和安全保障分析。Protection measure

24、s and safety and security analysis.2、advantages 分析工作在行动之前，可以及早排除、降低和控制危险；Early elimination,reduction and control of hazards;系统开发、设计、制造、安装、检修等过程的分析结果，可以作为应遵循的注意事项和指导方针；Guidelines可为制定标准和规范提供必要资料；可以作为安全教育的教材。Safety education General steps Preliminary Hazard Analysis including three stages:preparation,r

25、eview,and the results summary确定系统对象；资料调查收集；系统功能分解；分析辨识危险；确定危险等级；制定措施；实施措施。Determine the system object;Data collection;System function decomposition;Analysis and identification of hazards;Determine the hazard level;Develop measures;Implementing measures.分析、辩识危险 Dangerous and harmful factorsInherent r

26、iskOccupational diseaseRisk of storage1、Safety Analysis of Household Water Heater 热水器用煤气加热，装有温度和煤气开关连锁，当水温超过规定温度时，连锁动作将煤气阀门关小；如果发生故障，则由泄压安全阀放出热水，防止事故发生。为了防止煤气漏出和炉膛内滞留煤气在热水器内设有燃气安全控制系统，由长明火、热电偶和电磁阀组成。由于长明火存在，即使溢出煤气也不会发生爆炸。若长明火灭了，热电偶起作用，通过电磁阀将煤气关闭，防止事故发生。Water heater heating by coalgas.It equipped wit

27、h temperature and gas switch chain,when the water temperature exceeds the specified temperature,the chain action will close the gas valve;If the fault occurs,accidents prevented by the hot water release from pressure relief valve.In order to prevent gas leakage and furnace gas retention,the gas safe

28、ty control system is located outside the heater.In order to prevent gas leakage and furnace gas retention.Gas safety control system consists of everlasting fire,thermocouple and electromagnetic valve.Due to the existence of everlasting fire,explosion will never happen even if the gas leak.If the fir

29、e is off,the thermocouple work and turn off gas by electromagnetic valve for preventing accidents.Fault Tree AnalysisFault tree analysis(FTA)is a top down,deductive failure analysis in which an undesired state of a system is analyzed using Boolean logic to combine a series of lower-level events.Faul

30、t Tree AnalysisThis analysis method is mainly used in the fields of safety engineering and reliability engineering to understand how systems can fail,to identify the best ways to reduce risk or to determine(or get a feeling for)event rates of a safety accident or a particular system level(functional

31、)failure.Fault Tree AnalysisThe basic symbols used in FTA are grouped as events,gates,and transfer symbols.Failure mode and effects analysisFailure mode and effects analysis(FMEA)also failure modes,plural,in many publicationswas one of the first highly structured,systematic techniques for failure analysis.Risk is the combination of End Effect Probability And Severity 演讲完毕，谢谢观看！