瓦斯爆炸下救生艙表面沖擊載荷分布數(shù)值模擬研究
發(fā)布時間：2018-10-22 10:06
【摘要】：煤炭是我國的主要能源之一,但在煤礦開采工作中每年都有許多大大小小的煤礦事故發(fā)生,使得煤礦開采成為危險行業(yè)。隨著時代的不斷發(fā)展,人們將目光越來越多的關(guān)注到煤礦安全生產(chǎn)中來,如何降低和防止煤礦事故的發(fā)生,成為一個日益重要的研究課題。這也促使了國家有關(guān)職責(zé)部門制定出關(guān)于煤礦安全生產(chǎn)的制度和設(shè)備來降低煤礦事故的發(fā)生,可移動式礦用救生艙就是其中之一。 在煤礦事故當(dāng)中,瓦斯爆炸是其中最主要的事故,因此救生艙是否能夠在瓦斯爆炸時不被破壞,是很重要的問題。為了對救生艙強(qiáng)度進(jìn)行分析,需要知道救生艙表面沖擊載荷的分布情況,但目前對于救生艙表面沖擊載荷分布的研究還很缺少,因此對救生艙表面沖擊載荷的研究是非常必要的。為了為設(shè)計人員設(shè)計救生艙提供詳細(xì)的數(shù)據(jù)支持,本文將對救生艙爆炸流場中表面沖擊載荷的分布情況進(jìn)行研究。本文主要進(jìn)行了以下幾個方面工作： 1、簡要介紹了開展本課題研究的目的、意義、國內(nèi)外現(xiàn)狀及不足、本文研究主要內(nèi)容。 2、對瓦斯爆炸沖擊波的基本理論進(jìn)行介紹及計算,包括瓦斯爆炸的機(jī)理、爆炸沖擊波的傳播及TNT當(dāng)量替換9.5%的空氣-甲烷混合氣體爆炸、爆炸沖擊波超壓計算以及爆炸沖擊波反射超壓計算等。 3、通過AUTODYN對矩形截面、圓形截面、拱形截面救生艙處于巷道水平方向中心位置及水平方向一側(cè)時兩種工況做的有限元分析,求得在這兩種情況下不同截面救生艙表面沖擊載荷的分布。同時提出設(shè)計人員對救生艙進(jìn)行強(qiáng)度分析時可采用分段加載載荷的方式。 4、研究擋墻對救生艙表面沖擊波載荷的削弱作用,通過AUTODYN數(shù)值模擬分析得到矩形擋墻距離救生艙迎波面不同位置時救生艙表面沖擊載荷分布以及擋墻為楔形時救生艙表面沖擊載荷分布。 最后總結(jié)本課題的研究成果,歸納有益的結(jié)論,分析提出需進(jìn)一步深入研究探討和拓寬的技術(shù)問題。
[Abstract]:Coal is one of the main energy sources in China, but there are many accidents in coal mining every year, which makes coal mining a dangerous industry. With the development of the times, people pay more and more attention to coal mine safety production. How to reduce and prevent coal mine accidents has become an increasingly important research topic. This has prompted the relevant departments of the state to formulate a system and equipment for coal mine safety production to reduce the occurrence of coal mine accidents, one of which is the movable mine lifebuoy. In coal mine accidents, gas explosion is the most important accident, so whether the lifebuoy can not be destroyed when the gas explosion is very important. In order to analyze the intensity of the lifebuoy, it is necessary to know the distribution of the impact load on the surface of the lifebuoy, but the research on the distribution of the impact load on the surface of the lifebuoy is still lacking. Therefore, it is necessary to study the impact load on the surface of the lifebuoy. In order to provide detailed data support for the design of lifebuoys, the distribution of surface impact loads in the explosion flow field of lifebuoys is studied in this paper. This paper mainly carried out the following aspects of work: 1, briefly introduced the purpose, significance, domestic and foreign status and shortcomings of the research, 2. The basic theory of the gas explosion shock wave is introduced and calculated, including the mechanism of the gas explosion, the propagation of the explosion shock wave and the TNT equivalent replacement of 9.5% air-methane mixture gas explosion. Explosion shock wave overpressure calculation and explosion shock wave reflection overpressure calculation etc. 3, through AUTODYN to rectangular section, circular section, The finite element analysis of the two working conditions is made when the lifebuoy with arch section is located in the center of horizontal direction of roadway and one side of horizontal direction, and the distribution of the impact load on the surface of the lifebuoy with different sections is obtained under these two conditions. At the same time, it is put forward that designers can use the method of subsection loading load when carrying out strength analysis of lifebuoys. 4, to study the weakening effect of retaining wall on the shock wave load on the surface of lifebuoys. By AUTODYN numerical simulation, the distribution of impact load on the surface of the lifebuoy when the rectangular retaining wall is located at different positions from the front wavefront of the lifebuoy and the impact load distribution on the surface of the capsule when the retaining wall is wedged is obtained. Finally, the paper summarizes the research results, concludes the useful conclusions, and puts forward the technical problems which need to be further studied and expanded.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD774
本文編號：2286866
[Abstract]:Coal is one of the main energy sources in China, but there are many accidents in coal mining every year, which makes coal mining a dangerous industry. With the development of the times, people pay more and more attention to coal mine safety production. How to reduce and prevent coal mine accidents has become an increasingly important research topic. This has prompted the relevant departments of the state to formulate a system and equipment for coal mine safety production to reduce the occurrence of coal mine accidents, one of which is the movable mine lifebuoy. In coal mine accidents, gas explosion is the most important accident, so whether the lifebuoy can not be destroyed when the gas explosion is very important. In order to analyze the intensity of the lifebuoy, it is necessary to know the distribution of the impact load on the surface of the lifebuoy, but the research on the distribution of the impact load on the surface of the lifebuoy is still lacking. Therefore, it is necessary to study the impact load on the surface of the lifebuoy. In order to provide detailed data support for the design of lifebuoys, the distribution of surface impact loads in the explosion flow field of lifebuoys is studied in this paper. This paper mainly carried out the following aspects of work: 1, briefly introduced the purpose, significance, domestic and foreign status and shortcomings of the research, 2. The basic theory of the gas explosion shock wave is introduced and calculated, including the mechanism of the gas explosion, the propagation of the explosion shock wave and the TNT equivalent replacement of 9.5% air-methane mixture gas explosion. Explosion shock wave overpressure calculation and explosion shock wave reflection overpressure calculation etc. 3, through AUTODYN to rectangular section, circular section, The finite element analysis of the two working conditions is made when the lifebuoy with arch section is located in the center of horizontal direction of roadway and one side of horizontal direction, and the distribution of the impact load on the surface of the lifebuoy with different sections is obtained under these two conditions. At the same time, it is put forward that designers can use the method of subsection loading load when carrying out strength analysis of lifebuoys. 4, to study the weakening effect of retaining wall on the shock wave load on the surface of lifebuoys. By AUTODYN numerical simulation, the distribution of impact load on the surface of the lifebuoy when the rectangular retaining wall is located at different positions from the front wavefront of the lifebuoy and the impact load distribution on the surface of the capsule when the retaining wall is wedged is obtained. Finally, the paper summarizes the research results, concludes the useful conclusions, and puts forward the technical problems which need to be further studied and expanded.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TD774
【參考文獻(xiàn)】
相關(guān)期刊論文 前4條
1 張安元;曲效成;;煤礦井下移動救生艙的發(fā)展現(xiàn)狀及趨勢[J];西安科技大學(xué)學(xué)報;2011年06期
2 萬成略,汪莉;可燃性氣體含氧量安全限值的探討[J];中國安全科學(xué)學(xué)報;1999年01期
3 劉晶波;閆秋實;伍俊;;坑道內(nèi)爆炸沖擊波傳播規(guī)律的研究[J];振動與沖擊;2009年06期
4 菅從光,林柏泉,翟成;瓦斯爆炸過程中爆炸波的結(jié)構(gòu)變化規(guī)律[J];中國礦業(yè)大學(xué)學(xué)報;2003年04期
，本文編號：2286866
本文鏈接：http://sikaile.net/kejilunwen/anquangongcheng/2286866.html
最近更新
教材專著
