本文關(guān)鍵詞：起伏地形對(duì)高速公路橋梁段區(qū)域風(fēng)場(chǎng)影響的研究　出處：《北京交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 風(fēng)場(chǎng) 數(shù)值模擬 高速公路 橋梁 起伏地形 CFD

【摘要】：本文研究?jī)?nèi)容屬于國(guó)家自然科學(xué)基金項(xiàng)目——“高速公路建設(shè)對(duì)區(qū)域氣流場(chǎng)影響的研究”(51178033)的一部分。隨著交通事業(yè)的高速發(fā)展和西部大開(kāi)發(fā)戰(zhàn)略的實(shí)施,山區(qū)高速公路的建設(shè)日益增多。由于山區(qū)地形較為復(fù)雜,很多區(qū)段都會(huì)架設(shè)高速公路橋梁段,以達(dá)到跨越不同的地形地貌、實(shí)現(xiàn)地區(qū)間交互聯(lián)通的效果。目前,橋梁風(fēng)工程的研究主要集中在風(fēng)荷載計(jì)算、抗風(fēng)設(shè)計(jì)、平坦地形條件下橋梁區(qū)域風(fēng)場(chǎng)的數(shù)值模擬等方面,對(duì)于起伏地形條件下高速公路橋梁段區(qū)域風(fēng)場(chǎng)的研究目前還不太成熟。因此,通過(guò)理論分析及數(shù)值模擬,探究起伏地形變化對(duì)高速公路橋梁段區(qū)域風(fēng)場(chǎng)的影響是很有意義的。 本文以計(jì)算流體動(dòng)力學(xué)基本理論為基礎(chǔ),利用CFD軟件Fluent,對(duì)不同起伏地形條件下,高速公路橋梁段區(qū)域風(fēng)場(chǎng)進(jìn)行數(shù)值模擬,主要研究?jī)?nèi)容有： 1.對(duì)迎風(fēng)側(cè)起伏地形條件下高速公路橋梁段區(qū)域風(fēng)場(chǎng)進(jìn)行數(shù)值模擬。改變起伏地形的高度、起伏地形與橋梁之間的距離、起伏地形的數(shù)量等參數(shù),對(duì)比分析不同工況時(shí)風(fēng)場(chǎng)的分布,探討迎風(fēng)側(cè)起伏地形的變化對(duì)高速公路橋梁段區(qū)域風(fēng)場(chǎng)的影響。 2.對(duì)背風(fēng)側(cè)起伏地形條件下高速公路橋梁段區(qū)域風(fēng)場(chǎng)進(jìn)行數(shù)值模擬。改變起伏地形的高度、起伏地形與橋梁之間的距離、起伏地形的數(shù)量等參數(shù),對(duì)比分析不同工況時(shí)風(fēng)場(chǎng)的分布,探討背風(fēng)側(cè)起伏地形的變化對(duì)高速公路橋梁段區(qū)域風(fēng)場(chǎng)的影響。 3.對(duì)兩側(cè)起伏地形條件下高速公路橋梁段區(qū)域風(fēng)場(chǎng)進(jìn)行數(shù)值模擬。改變起伏地形的高度、起伏地形與橋梁之間的距離、起伏地形的數(shù)量等參數(shù),對(duì)比分析不同工況時(shí)風(fēng)場(chǎng)的分布,探討兩側(cè)起伏地形的變化對(duì)高速公路橋梁段區(qū)域風(fēng)場(chǎng)的影響；將平坦地形、迎風(fēng)側(cè)、背風(fēng)側(cè),兩側(cè)起伏地形四種工況數(shù)值計(jì)算結(jié)果對(duì)比分析,探討不同類型起伏地形條件下,高速公路橋梁段區(qū)域風(fēng)場(chǎng)的分布規(guī)律。 4.對(duì)本文的研究結(jié)果進(jìn)行分析總結(jié),提出需要進(jìn)一步開(kāi)展的研究工作。
[Abstract]:The research content of this paper belongs to the National Natural Science Foundation of China-"the study of the influence of highway construction on regional airflow field" (51178033). With the rapid development of transportation and the implementation of the western development strategy. The construction of mountain highway is increasing day by day. Because the terrain of mountain area is more complex, many sections will set up highway bridge section to reach the effect of crossing different terrain and geomorphology and realizing the mutual connection between regions. At present. The research of bridge wind engineering mainly focuses on wind load calculation, wind resistance design, and numerical simulation of wind field in bridge area under flat terrain. The study of wind field in highway bridge section under undulating terrain is not very mature at present. Therefore, through theoretical analysis and numerical simulation. It is significant to explore the influence of undulating topography on the wind field in highway bridge section. Based on the basic theory of computational fluid dynamics (CFD), the wind field in highway bridge section is numerically simulated by using CFD software Fluent. under different undulating terrain conditions. The main research contents are as follows: 1. Numerical simulation of wind field in bridge section of expressway under upwind side undulating terrain, changing the height of undulating terrain, distance between undulating terrain and bridge, quantity of undulating terrain and so on. The distribution of wind field in different working conditions is analyzed, and the influence of upwind side undulating topography on the wind field in bridge section of expressway is discussed. 2. Numerical simulation of wind field in the bridge section of expressway under the condition of leeward side undulating terrain, changing the height of undulating terrain, the distance between undulating terrain and bridge, the quantity of undulating terrain and so on. The distribution of wind field in different working conditions is analyzed, and the influence of the variation of leeward side undulating topography on the wind field in bridge section of expressway is discussed. 3. Numerical simulation of the wind field in the bridge section of expressway under the condition of undulating terrain on both sides, changing the height of the undulating terrain, the distance between the undulating terrain and the bridge, the quantity of undulating terrain and so on. The distribution of wind field under different working conditions is analyzed, and the influence of the undulating terrain on the wind field in the bridge section of expressway is discussed. In this paper, the numerical results of flat terrain, upwind side, leeward side and undulating terrain on both sides are compared and analyzed, and the distribution of wind field in highway bridge section under different types of undulating terrain is discussed. 4. The research results of this paper are analyzed and summarized, and the further research work is put forward.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.59

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