【摘要】：隨著科技的發(fā)展,機電產(chǎn)品在人們生產(chǎn)、生活中起到了越來越重要的作用,同時,因產(chǎn)品安全性問題導致的事故也屢見不鮮。安全性是產(chǎn)品的重要性能參數(shù),為了能夠更好的提高產(chǎn)品的安全性,本文引入了預警的概念,“預警”作為一種預防事故發(fā)生的有效方法對減少不必要的人員傷亡、財產(chǎn)損失等事故有重要作用。 本文在系統(tǒng)安全分析方法及失效概率理論的基礎(chǔ)上建立了機電產(chǎn)品安全性預警模型。該模型的目的為構(gòu)建產(chǎn)品事故的發(fā)生概率與產(chǎn)品的零部件失效概率之間的一種關(guān)系,進而計算產(chǎn)品事故的發(fā)生概率超出可接受的限值時所對應的預警時刻。首先,本文對分析得出的產(chǎn)品事故類型,按照可能產(chǎn)生的事故后果的嚴重性等級確定預警級別。其次,根據(jù)經(jīng)驗、相關(guān)標準等設(shè)定事故的發(fā)生概率限值,由事故樹分析找出所有可能導致產(chǎn)品事故發(fā)生的零部件失效模式組合(最小割集)。最后,根據(jù)產(chǎn)品事故頂上事件的發(fā)生概率公式,結(jié)合失效概率公式構(gòu)建一個含有變量t的函數(shù)關(guān)系式求解預警時間,依此提前告警以預防事故的發(fā)生。 對可修復產(chǎn)品而言,本文提出了二次預警,即在產(chǎn)品維修后的繼續(xù)使用過程中,也可以通過預警來提高產(chǎn)品的安全性,最后,本文以電梯為實例,對本文的機電產(chǎn)品安全性預警模型進行了應用驗證。
[Abstract]:With the development of science and technology, mechanical and electrical products play a more and more important role in people's production and life. At the same time, accidents caused by product safety problems are not uncommon. Safety is an important performance parameter of products. In order to improve the safety of products better, the concept of early warning is introduced in this paper. As an effective method to prevent accidents, early warning can reduce unnecessary casualties. Accidents such as property losses play an important role. Based on the system safety analysis method and failure probability theory, a safety early warning model for electromechanical products is established in this paper. The purpose of this model is to construct a relationship between the probability of product accident and the probability of failure of product parts, and then to calculate the corresponding warning time when the probability of product accident exceeds the acceptable limit. First of all, according to the severity of the possible accident consequences, this paper determines the warning level for the product accident types. Secondly, according to the experience, the relevant standards set the probability limit of the occurrence of the accident, and the failure mode combination (minimum cut set) of all parts that may lead to the product accident is found out by the accident tree analysis. Finally, according to the probability formula of the event on the top of the product accident, combining the failure probability formula, a function formula with variable t is constructed to solve the early warning time, so as to prevent the occurrence of the accident in advance. For the repairable products, this paper puts forward the second warning, that is, in the process of continuous use of the product after maintenance, it can also improve the safety of the product through early warning. Finally, this paper takes the elevator as an example. The safety warning model of electromechanical products in this paper is verified by application.
【學位授予單位】：沈陽航空航天大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH-39

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