Analysis of pipeline burst accident based on improved FRAM model
The purpose of this paper is to prevent and control the main steam pipe explosion accidents.To achieve this goal,we adopted the improved Functional Resonance Analysis Method(FRAM)to analyze the coupling effect of each function in the main steam pipeline system and established a barrier for the failure function to block the change transmission of the system.In the process of research,we took a major steam pipeline explosion accident as a case.First of all,we used the Sequentially Timed Events Plotting(STEP)technology and combined it with the accident investigation report to find out the key events and their related events to identify the change nodes of the accident.Combined with the FRAM model principle,we identified the seven functions of the system,including on-site disposal,negotiation plan,etc.Then we analyzed the FRAM hexagonal feature analysis table of each function from six aspects of input,output,premise,resource,time and control,and completed the description of the function.In addition,we introduced a Monte Carlo simulation method to realize objective quantification of the change and coupling relationship of each function in the FRAM model.After that,we used expert consultation to determine the probability distribution of function change in time and accuracy and used crystal ball software to conduct a Monte Carlo simulation.We obtained the probability distribution of function change and the discrete probability distribution of coupling change between functions.Therefore,we determined the function and failure connection of the system to generate resonance and developed barrier measures from four aspects:physical barrier,symbolic barrier,functional barrier,and intangible barrier.The results show that the improved FRAM model can fully identify the functional information and quantitatively determine the change and coupling relationship of each function in the FRAM model,reduce the subjectivity of the analysis of functional performance change and potential coupling change,and find out the resonance function and failure connection of the system.
safety engineeringpipeline burst accidentFunctional Resonance Analysis Method(FRAM)accident analysisfailure link
NETL
NSTL
万方数据
维普
