本文選題：聲屏障 + 半封閉型聲屏障��； 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：改革開放以來,我國在各個(gè)方面均取得了偉大的成就。隨著經(jīng)濟(jì)的高速發(fā)展,城市規(guī)模迅速增大,城市環(huán)境噪聲問題也逐漸成為了不得不重視的問題。城市環(huán)境噪聲影響著人們的正常生活、工作與身心健康,在室外方面,道路沿線的住宅及院落受交通噪聲影響嚴(yán)重,在室內(nèi)方面,大型的開放式辦公室內(nèi)的聲環(huán)境也不容樂觀。無論是在室內(nèi)還是室外情況下,設(shè)置聲屏障都能作為常用且有效的降噪手段。本文首先對受交通噪聲影響的實(shí)際院落進(jìn)行了降噪分析,并在此基礎(chǔ)上,提出半封閉型聲屏障的概念,半封閉型聲屏障指的是由一定長度的直線聲屏障和與之垂直的兩側(cè)邊聲屏障組合而成的一種聲屏障組合形式。在提出半封閉型聲屏障概念的基礎(chǔ)上,總結(jié)并且建立其在室外典型場景——東北地區(qū)道路沿線院落中的應(yīng)用模型,對該模型中半封閉聲屏障的降噪效果進(jìn)行了半消聲室內(nèi)的1:5縮尺模型實(shí)驗(yàn),同時(shí)對同樣場景設(shè)置同樣位置的接收點(diǎn)進(jìn)行模擬分析,將實(shí)驗(yàn)與模擬結(jié)果進(jìn)行對比分析,發(fā)現(xiàn)兩組結(jié)果的變化趨勢是基本相同的,于是計(jì)算機(jī)軟件模擬的有效性得到了確定。利用室外半封閉型聲屏障模型,使用室外環(huán)境噪聲模擬軟件Cadna/A對院落聲環(huán)境的降噪和其他影響因素進(jìn)行了模擬分析,首先變化半封閉型聲屏障的高度和側(cè)邊長度,得出要達(dá)到一定降噪效果的半封閉型聲屏障尺寸設(shè)置。然后變化院落外側(cè)與道路中心線的距離和半封閉型聲屏障吸聲性能,以探究這些客觀因素對于院落聲環(huán)境的影響。本文最后對于半封閉型聲屏障在典型室內(nèi)扁平空間的應(yīng)用——開放式辦公室內(nèi)的隔間的模型進(jìn)行探討,建立了扁平空間內(nèi)單個(gè)半封閉型隔間的應(yīng)用模型,同時(shí)建立與其主邊長相等的單個(gè)隔板,探討半封閉型隔間相對于單個(gè)隔板的優(yōu)越性。然后建立了兩個(gè)相鄰半封閉型隔間的三種應(yīng)用模型,模擬分析不同因素對扁平空間內(nèi)兩個(gè)相鄰半封閉型隔間之間聲音傳播的影響,發(fā)現(xiàn)層高和天花板吸聲系數(shù)的影響最大;隔間的高度和側(cè)邊長度增加到一定程度之后再繼續(xù)增加,聲壓級下降幅度變小,甚至不再下降,或者因?yàn)榉瓷渎暤脑黾佣兴仙?br/>[Abstract]:Since the reform and opening up, China has made great achievements in all aspects. With the rapid development of economy, the urban scale is increasing rapidly, and the problem of urban environmental noise has gradually become a problem that must be paid attention to. Urban environmental noise affects people's normal life, work and physical and mental health. Outside, the residential buildings and courtyard along the road are seriously affected by traffic noise. In the interior, the sound environment in large open office is not optimistic. In both indoor and outdoor situations, noise barriers can be used as common and effective means of noise reduction. In this paper, first of all, the noise reduction of the actual courtyard affected by traffic noise is analyzed, and on this basis, the concept of semi-closed noise barrier is proposed. The semi-closed sound barrier is a kind of sound barrier which is composed of a linear sound barrier of a certain length and a sound barrier perpendicular to both sides of the sound barrier. On the basis of putting forward the concept of semi-closed noise barrier, the application model of the semi-closed noise barrier in the typical outdoor scene, the courtyard along the road in Northeast China, is summarized and established. In this paper, the noise reduction effect of semi-closed noise barrier in the semi-silencing room is tested by 1:5 scale model. At the same time, the reception points in the same scene are simulated and analyzed, and the results of experiment and simulation are compared and analyzed. It is found that the variation trend of the two groups of results is basically the same, so the validity of computer software simulation is determined. Using outdoor semi-closed noise barrier model and outdoor noise simulation software Cadna/A, the noise reduction and other influencing factors in courtyard sound environment are simulated and analyzed. Firstly, the height and side length of semi-closed sound barrier are changed. To achieve a certain noise reduction effect of the semi-closed sound barrier size setting. Then the distance between the outside of the courtyard and the center line of the road and the sound absorption performance of the semi-closed sound barrier were changed to explore the influence of these objective factors on the sound environment of the courtyard. In the end of this paper, the application of semi-closed noise barrier in typical indoor flat space, the model of open office compartment is discussed, and the application model of single semi-closed compartment in flat space is established. At the same time, a single partition with the same length as the main side is established, and the superiority of the semi-closed partition over the single partition is discussed. Then, three application models of two adjacent semi-enclosed cubicles are established, and the effects of different factors on sound propagation between two adjacent semi-enclosed cubicles in flat space are simulated and analyzed. It is found that the influence of the height of the floor and the sound absorption coefficient of the ceiling is the greatest. When the height and side length of the compartment increase to a certain extent, the sound pressure level decreases by a small or even no longer, or increases because of the increase of the reflected sound.
【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】：2017
【分類號】：U491.91;TU112

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