基于海洋平臺碰撞事故的LNG船泄露風(fēng)險評估
發(fā)布時間：2019-03-10 21:03
【摘要】：在航行過程中，船舶發(fā)生海損事故是難免的。在猛烈的沖擊作用下，LNG船舷側(cè)結(jié)構(gòu)遭受嚴(yán)重?fù)p傷，引發(fā)LNG泄露事故。泄露的LNG在空氣中迅速形成重氣云團(tuán)，在燃燒爆炸范圍，一旦遇到點火源，即刻發(fā)生燃燒，，極有可能升級為火災(zāi)、爆炸事故，進(jìn)一步加劇船體結(jié)構(gòu)的破損，不僅會對人員及設(shè)備的安全構(gòu)成威脅，還對環(huán)境形成污染。對LNG船進(jìn)行風(fēng)險評估工作，可以科學(xué)預(yù)測事故發(fā)生的概率以及事故產(chǎn)生的后果。在船舶與海洋工程領(lǐng)域，定量風(fēng)險評估技術(shù)越來越受到人們的關(guān)注，主要是因為該技術(shù)能深刻反映風(fēng)險本質(zhì)，對提高LNG船營運(yùn)過程中的安全性具有重要意義，為設(shè)計降低LNG船泄露的可能性提供了較為可靠的理論依據(jù)。 本文在風(fēng)險評估理論的基礎(chǔ)上，對風(fēng)險識別進(jìn)行了簡單介紹；對計算事故發(fā)生率的方法進(jìn)行探討分析，并做相應(yīng)的計算；在研究故障樹(FT)分析方法的基礎(chǔ)上，引入了貝葉斯網(wǎng)絡(luò)(BN)定量分析導(dǎo)致碰撞事故發(fā)生的人為原因。 本文還對LNG船舷側(cè)采用復(fù)合夾層結(jié)構(gòu)來增強(qiáng)其耐撞性進(jìn)行了研究，提出了降低風(fēng)險后果的措施；最后將模糊綜合評判法(FCE)與LNG船泄露風(fēng)險評估相結(jié)合，實現(xiàn)了與海洋平臺碰撞LNG船泄露的模糊綜合評判。 本文主要工作及結(jié)論如下： (1)分析了在海洋工程風(fēng)險評估領(lǐng)域目前國內(nèi)外研究進(jìn)展，闡述了風(fēng)險評估的理論基礎(chǔ)，從個人風(fēng)險、社會風(fēng)險、環(huán)境風(fēng)險三方面進(jìn)行風(fēng)險衡量，同時探討風(fēng)險可接受準(zhǔn)則。 (2)對風(fēng)險識別進(jìn)行了簡單的介紹，比較了各種常用風(fēng)險評估方法的優(yōu)缺點，分析事故后果對人員、設(shè)施的產(chǎn)生的影響，提出了控制風(fēng)險的措施。 (3)基于二項分布預(yù)測了LNG船年度碰撞事故發(fā)生概率；參考DNV過往船只與海洋平臺發(fā)生碰撞風(fēng)險的分析方法，利用程序計算了LNG船處于不同角度時與海洋平臺發(fā)生碰撞的概率，發(fā)現(xiàn)LNG船碰撞事故發(fā)生的概率隨角度的增大呈指數(shù)增長，計算結(jié)果與統(tǒng)計資料基本一致。同時在研究故障樹(FT)分析方法的基礎(chǔ)上，引入了貝葉斯網(wǎng)絡(luò)(BN)定量分析導(dǎo)致碰撞事故發(fā)生的人為原因，并提出了降低事故后果的措施。 (4)本文提出了一種復(fù)合夾層結(jié)構(gòu)形式，用該結(jié)構(gòu)替代LNG船原有的雙舷側(cè)結(jié)構(gòu)，并借助非線性有限元分析軟件MSC.Dytran對此進(jìn)行模擬計算。與傳統(tǒng)的鋼結(jié)構(gòu)相比，復(fù)合夾層結(jié)構(gòu)優(yōu)勢比較明顯，如：結(jié)構(gòu)的承載能力、抗沖擊能力好，具有優(yōu)良的耐撞性能、結(jié)構(gòu)形式簡單、結(jié)構(gòu)本身較輕等，是降低風(fēng)險后果的有效措施之一。 (5)在模糊綜合評判理論的基礎(chǔ)上，運(yùn)用層次分析法，引入泄露氣體量、LNG特性、天氣海況、LNG船狀及人員狀況(距風(fēng)險源距離)等風(fēng)險影響因素，計算了各影響因素(參數(shù))的權(quán)重系數(shù)，對LNG船泄露風(fēng)險的進(jìn)行模糊綜合評判。
[Abstract]:In the course of sailing, it is inevitable that there will be an average accident on the ship. Under the severe impact, the side structure of LNG ship suffered serious damage, causing LNG leakage accident. The leaked LNG rapidly forms heavy gas clouds in the air. In the range of combustion and explosion, once a source of ignition is encountered, combustion occurs immediately, which is likely to escalate into a fire and explosion accident, thus further aggravating the damage of the hull structure. It will not only threaten the safety of personnel and equipment, but also pollute the environment. The risk assessment of LNG ship can predict the probability of accident and the consequence of accident scientifically. In the field of ship and marine engineering, quantitative risk assessment technology has been paid more and more attention, mainly because it can reflect the nature of risk deeply, and it is of great significance to improve the safety of LNG ship operation. It provides a reliable theoretical basis for the design of reducing the possibility of LNG ship leakage. Based on the theory of risk assessment, this paper briefly introduces the risk identification, discusses and analyzes the method of calculating the accident incidence, and makes the corresponding calculation. Based on the study of fault tree (FT) analysis method, Bayesian network (BN) is introduced to quantitatively analyze the man-made causes of collision accidents. In this paper, the use of composite sandwich structure on the side of LNG ship to enhance its crashworthiness is also studied, and the measures to reduce the risk consequences are put forward. Finally, the fuzzy comprehensive evaluation method (FCE) and LNG ship leakage risk assessment are combined to realize the fuzzy comprehensive evaluation of LNG ship leakage in collision with offshore platform. The main work and conclusions of this paper are as follows: (1) the research progress in the field of marine engineering risk assessment at home and abroad is analyzed, and the theoretical basis of risk assessment, including individual risk and social risk, is expounded. Environmental risk three aspects of risk measurement, while exploring the risk acceptable criteria. (2) the paper briefly introduces the risk identification, compares the advantages and disadvantages of all kinds of commonly used risk assessment methods, analyzes the impact of the accident consequences on the personnel and facilities, and puts forward the measures to control the risk. (3) based on binomial distribution, the probability of annual collision accident of LNG ship is predicted. Referring to the analysis method of collision risk between DNV ship and offshore platform, the probability of collision between LNG ship and offshore platform at different angles is calculated by program. It is found that the probability of LNG collision increases exponentially with the increase of angle, and the calculated results are basically consistent with the statistical data. At the same time, on the basis of studying the fault tree (FT) analysis method, the Bayesian network (BN) is introduced to quantitatively analyze the man-made cause of the collision accident, and the measures to reduce the accident consequence are put forward. (4) in this paper, a kind of composite sandwich structure is proposed, which is used to replace the original double-side structure of LNG ship, and it is simulated and calculated with the help of nonlinear finite element analysis software MSC.Dytran. Compared with the traditional steel structure, the composite sandwich structure has obvious advantages, such as the bearing capacity of the structure, the good impact resistance, the excellent impact resistance, the simple form of the structure, the lighter structure itself, and so on. It is one of the effective measures to reduce the risk consequences. (5) on the basis of fuzzy comprehensive evaluation theory, using analytic hierarchy process (AHP), risk factors such as leakage gas, LNG characteristics, weather and sea conditions, LNG ship shape and personnel status (distance from risk source) are introduced. The weight coefficient of each influencing factor (parameter) is calculated, and the fuzzy comprehensive evaluation of the leakage risk of LNG ship is carried out.
【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：U698
本文編號：2438018
[Abstract]:In the course of sailing, it is inevitable that there will be an average accident on the ship. Under the severe impact, the side structure of LNG ship suffered serious damage, causing LNG leakage accident. The leaked LNG rapidly forms heavy gas clouds in the air. In the range of combustion and explosion, once a source of ignition is encountered, combustion occurs immediately, which is likely to escalate into a fire and explosion accident, thus further aggravating the damage of the hull structure. It will not only threaten the safety of personnel and equipment, but also pollute the environment. The risk assessment of LNG ship can predict the probability of accident and the consequence of accident scientifically. In the field of ship and marine engineering, quantitative risk assessment technology has been paid more and more attention, mainly because it can reflect the nature of risk deeply, and it is of great significance to improve the safety of LNG ship operation. It provides a reliable theoretical basis for the design of reducing the possibility of LNG ship leakage. Based on the theory of risk assessment, this paper briefly introduces the risk identification, discusses and analyzes the method of calculating the accident incidence, and makes the corresponding calculation. Based on the study of fault tree (FT) analysis method, Bayesian network (BN) is introduced to quantitatively analyze the man-made causes of collision accidents. In this paper, the use of composite sandwich structure on the side of LNG ship to enhance its crashworthiness is also studied, and the measures to reduce the risk consequences are put forward. Finally, the fuzzy comprehensive evaluation method (FCE) and LNG ship leakage risk assessment are combined to realize the fuzzy comprehensive evaluation of LNG ship leakage in collision with offshore platform. The main work and conclusions of this paper are as follows: (1) the research progress in the field of marine engineering risk assessment at home and abroad is analyzed, and the theoretical basis of risk assessment, including individual risk and social risk, is expounded. Environmental risk three aspects of risk measurement, while exploring the risk acceptable criteria. (2) the paper briefly introduces the risk identification, compares the advantages and disadvantages of all kinds of commonly used risk assessment methods, analyzes the impact of the accident consequences on the personnel and facilities, and puts forward the measures to control the risk. (3) based on binomial distribution, the probability of annual collision accident of LNG ship is predicted. Referring to the analysis method of collision risk between DNV ship and offshore platform, the probability of collision between LNG ship and offshore platform at different angles is calculated by program. It is found that the probability of LNG collision increases exponentially with the increase of angle, and the calculated results are basically consistent with the statistical data. At the same time, on the basis of studying the fault tree (FT) analysis method, the Bayesian network (BN) is introduced to quantitatively analyze the man-made cause of the collision accident, and the measures to reduce the accident consequence are put forward. (4) in this paper, a kind of composite sandwich structure is proposed, which is used to replace the original double-side structure of LNG ship, and it is simulated and calculated with the help of nonlinear finite element analysis software MSC.Dytran. Compared with the traditional steel structure, the composite sandwich structure has obvious advantages, such as the bearing capacity of the structure, the good impact resistance, the excellent impact resistance, the simple form of the structure, the lighter structure itself, and so on. It is one of the effective measures to reduce the risk consequences. (5) on the basis of fuzzy comprehensive evaluation theory, using analytic hierarchy process (AHP), risk factors such as leakage gas, LNG characteristics, weather and sea conditions, LNG ship shape and personnel status (distance from risk source) are introduced. The weight coefficient of each influencing factor (parameter) is calculated, and the fuzzy comprehensive evaluation of the leakage risk of LNG ship is carried out.
【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：U698
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 王紅芳,趙玫;艦用電子設(shè)備結(jié)構(gòu)可靠性模糊綜合評估研究[J];船舶工程;2000年05期
2 高丹;壽建敏;;模糊綜合評價法在船舶溢油事故定級中的應(yīng)用[J];船舶;2007年04期
3 張海紅;王鳳琴;畢明樹;;LNG儲罐泄漏擴(kuò)散火災(zāi)后果分析[J];化學(xué)工程與裝備;2010年02期
4 謝紅衛(wèi);孫志強(qiáng);李欣欣;李政儀;張明;史秀建;李龍;;典型人因可靠性分析方法評述[J];國防科技大學(xué)學(xué)報;2007年02期
5 陳剛,張圣坤;海洋工程人因可靠性研究進(jìn)展[J];海洋工程;2000年04期
6 李典慶,唐文勇,張圣坤;海洋工程風(fēng)險接受準(zhǔn)則研究進(jìn)展[J];海洋工程;2003年02期
7 王宗軍;綜合評價的方法、問題及其研究趨勢[J];管理科學(xué)學(xué)報;1998年01期
8 李剛;;風(fēng)險評估技術(shù)及其在海上平臺的應(yīng)用[J];內(nèi)江科技;2006年04期
9 劉斐;劉茂;;城市輸氣管線火災(zāi)事故的風(fēng)險定量計算[J];安全與環(huán)境工程;2006年04期
10 沈斐敏 ,伍良;燃?xì)饣馂?zāi)爆炸風(fēng)險評價中不確定性問題的探討[J];安全與健康;2002年21期
相關(guān)博士學(xué)位論文 前1條
1 張力;概率安全評價中人因可靠性分析技術(shù)研究[D];湖南大學(xué);2004年
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