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  本文選題：大板梁 + 二疊梁拼接設(shè)計��； 參考：《哈爾濱工業(yè)大學(xué)》2014年碩士論文

【摘要】：大型鍋爐具有提高能源利用效率、減少污染物排放的優(yōu)勢，更大容量、更高參數(shù)的鍋爐成為目前火電發(fā)展的趨勢。大板梁是鍋爐鋼結(jié)構(gòu)中最重要的受力構(gòu)件，，其承擔(dān)懸吊于下方的數(shù)以萬噸的爐體自重，并將荷載傳遞給鍋爐構(gòu)架。大板梁較大的尺寸及自重成為影響其運輸和安裝成本及效率的重要因素，且隨著鍋爐容量的日趨增大，這個問題變得更加重要。目前常用的辦法是將大板梁分別沿高度和長度方向進(jìn)行拼接，其中沿高度方向拼接已有較成熟的做法，而沿長度方向拼接的研究和工程應(yīng)用較少。故本文以新疆九臺農(nóng)六師爐頂大板梁拼接工程項目為研究背景，以數(shù)值模擬為手段，針對大板梁沿長度方向拼接問題進(jìn)行分析研究，主要開展了以下研究工作： （1）運用現(xiàn)有的規(guī)范手冊以及相關(guān)的力學(xué)知識對四根通長的大板梁進(jìn)行沿長度方向拼接的節(jié)點設(shè)計，給出拼接節(jié)點螺栓及板件的布置并進(jìn)行相關(guān)驗算。 （2）運用有限元分析軟件ANSYS完成大板梁沿長度方向拼接位置分析，分析比較大板梁在不同位置拼接時的力學(xué)性能，并結(jié)合工程實際給出相應(yīng)結(jié)論。 （3）運用有限元分析軟件ANSYS，分析厚度公差、板件厚度等制造安裝誤差因素對大板梁拼接連接摩擦力損失的影響。 （4）運用有限元分析軟件ABAQUS對螺栓和鋼板進(jìn)行三維實體建模，對拼接連接節(jié)點進(jìn)行局部分析，討論螺栓間距、預(yù)緊力等因素對拼接螺栓受力以及應(yīng)力分布的影響。
[Abstract]:Large boilers have the advantages of improving energy utilization efficiency, reducing pollutant emissions, larger capacity and higher parameters, which have become the trend of thermal power development at present. Large plate beam is the most important bearing member in boiler steel structure. It bears tens of thousands of tons of dead weight of furnace body suspended below and transfers the load to boiler frame. The larger size and deadweight of large plate beam become an important factor affecting the cost and efficiency of transportation and installation, and with the increasing capacity of boiler, this problem becomes more and more important. At present, the commonly used method is to splice large plate beams along the direction of height and length respectively, in which there is a more mature way of stitching along the direction of height, but the research and engineering application of splicing along the direction of length is less. Therefore, based on the research background of the large slab beam splicing project on the top of the furnace of the sixth division of Nong six division in Xinjiang, and by means of numerical simulation, this paper analyzes and studies the jointing problem of the large plate beam along the length direction, and mainly carries out the following research work: 1) the joint design along the length of four long plate beams is designed by using the existing specification manual and relevant mechanical knowledge, and the arrangement of joint bolts and plates is given and the relevant checking calculation is carried out. The finite element analysis software ANSYS is used to analyze the position of large plate beam splicing along the length direction, and the mechanical properties of the large plate beam are analyzed and compared in different positions, and the corresponding conclusions are given in combination with the engineering practice. 3) using finite element analysis software ANSYS, the influence of manufacturing and installation error factors, such as thickness tolerance and plate thickness, on friction loss of large plate beam splicing connection is analyzed. The finite element analysis software ABAQUS is used to model the bolt and steel plate, and the local analysis of joint joint is carried out. The effects of bolt spacing and pretightening force on the stress and stress distribution of bolt are discussed.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TK222;TU391

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本文編號：1815951