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<span id="vvpjbhn" class="fl">商用建筑噪聲治理</span> <div id="91hpht1" class="fr"> <a href="/">首頁(yè)</a> >> <a href="/list_13/">建筑噪聲治理</a> >> <a href="/list_20/">商用建筑噪聲治理</a> </div> </div> <div id="hbnlrjh" class="details_ti"> <p class="details_ti">商用建筑噪聲治理</p> <div id="rzxjfr5" class="details_ti_span"> <span>發(fā)布日期：2022-06-27</span> <span>瀏覽量：1104</span> <span>分享到：</span> <div id="3xpx7rd" class="bdsharebuttonbox" data-bd-bind="1583844254878"> <a href="javascript:;" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a> <a href="javascript:;" class="bds_qzone" data-cmd="qzone" title="分享到QQ空間"></a> <a href="javascript:;" class="bds_tsina" data-cmd="tsina" title="分享到新浪微博"></a> <a href="javascript:;" class="bds_tqq" data-cmd="tqq" title="分享到騰訊微博"></a> <a href="javascript:;" class="bds_renren" data-cmd="tsina" title="分享到人人網(wǎng)"></a> <a href="javascript:;" class="bds_more" data-cmd="bds_more"></a> </div> </div> </div> <div id="n55frjv" class="details_size"> <p> <img src="/static/upload/image/20220627/1656311948197487.jpg" title="1656311948197487.jpg" alt="1-2104231H225915.jpg"/></p><p><span style="font-size: medium;">商務(wù)建筑包括商業(yè)零售、商務(wù)辦公、酒店餐飲、公寓住宅、綜合娛樂(lè )、展覽會(huì )議等經(jīng)濟聚集體。同時(shí)，將前述城市生活空間的三項以上功能進(jìn)行組合，并在各部分間建立一種相互依存、相互裨益的能動(dòng)關(guān)系，從而形成一個(gè)多功能、高效率、復雜而統一的綜合體稱(chēng)作商業(yè)綜合體。</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">一、綜合聲環(huán)境要求</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">依據聲環(huán)境質(zhì)量標準GB3096-2008，所適用的類(lèi)別為2類(lèi)聲環(huán)境功能區，晝間不得高于60dB(A),夜間不得高于50dB（A）。</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">二、主要聲源分析</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">商務(wù)建筑及商業(yè)綜合體的聲源比較復雜，有交通噪聲，生活噪聲，最主要的是建筑本身設備噪聲。常見(jiàn)的有冷卻塔噪聲、熱泵機組、VRV噪聲、排油煙風(fēng)機噪聲、空調機房循環(huán)泵、水泵噪聲、新風(fēng)空調箱噪聲、客房或辦公室室內機噪音等，對環(huán)境影響較大。</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">三、噪聲控制方案</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">1. 減振</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">在噪聲處理過(guò)程中，結構噪聲傳遞是容易被忽略并且較難處理的一環(huán)。我們通常所說(shuō)的隔振為消極隔振，是為了減少設備對外部結構的影響，采用隔振器減少振動(dòng)的輸出的措施。選用隔振器件的核心在于重量、頻率、剛度的匹配。選擇匹配的隔振結構，使用正確方法安裝，才能確保獲得較高的隔振效率。需要注意的是，在固體傳聲隔絕的過(guò)程中彈簧減振器的使用需要非常慎重。</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">2. 隔聲</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">隔聲是利用聲音傳播的特性，用隔聲構件將噪聲源和接收者分開(kāi)，盡量多的使聲能在穿透屏蔽物時(shí)消耗或轉化，阻止大部分聲能透過(guò)，降低噪聲的傳播。影響隔聲性能的因素：一是隔聲材料的密度、彈性、阻尼等特性；一般材料的面密度越大，隔聲量就越大，另外增加材料阻尼可降低吻合效應和結構共振對隔聲量的不利影響。二是隔聲措施的幾何尺寸和安裝條件（尤其是密封）。三是聲源的頻率特性、聲波的入射角度和聲場(chǎng)的分布。隔聲設計須注意噪聲源的頻譜特性。獨立強的聲源，應選用隔聲罩。不宜對噪聲源進(jìn)行處理時(shí)，人員不經(jīng)常停留在設備附近時(shí)，應選用便于觀(guān)察、休息和控制的隔聲室。例如：冷卻塔、風(fēng)冷熱泵機組等獨立強的聲源，應選用隔聲罩。</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">3. 消聲</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">消聲器是允許氣流通過(guò)，卻又能阻止或減小聲音傳播的一種器件，是消除空氣動(dòng)力性噪聲的重要措施。消聲器能夠阻擋聲波的傳播，允許氣流通過(guò)，是控制噪聲的有效工具。消聲器主要用于機械設備的進(jìn)、排氣管道或通風(fēng)管道的噪聲控制。消聲器只能降低進(jìn)、排氣口噪聲和沿管道傳播的噪聲，不能降低設備本體機殼、管壁等輻射的噪聲。消聲器種類(lèi)很多，根據消聲機理，可分為五種主要的類(lèi)型，即阻性消聲器、抗性消聲器、阻抗復合式消聲器、微穿孔板消聲器（馬大猷院士研制）、擴散消聲器和有源消聲器。</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">4. 吸聲 </span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;">當聲音入射到吸聲材料表面時(shí)，部分聲能被吸收，使反射聲減弱，一部分聲能被反射，另一部分聲能被吸聲材料吸收轉化為熱能而消耗掉。采用吸聲材料來(lái)降低室內混響聲，按機理可分為多孔性吸聲材料和共振吸聲結構。吸聲處理只能降低室內反射聲，不能降低直達聲。室內吸聲處理是噪聲控制的主要措施之一。經(jīng)吸聲處理后，室內混響聲降低有時(shí)能達到10dB。</span><br style="font-size: medium; white-space: normal;"/><span style="font-size: medium;"> 降噪一般首先采用隔聲、消聲等處理，當這兩種方式不宜采用，或采用后不能達到降噪目標時(shí)，可采用吸聲處理作為輔助手段。當房間小，且需降噪量較高時(shí)，可對墻面和天花同時(shí)進(jìn)行吸聲處理。類(lèi)似大型設備間等場(chǎng)所面積較大時(shí)，宜采用空間吸收體或對平頂進(jìn)行處理。聲源集中在局部區域時(shí)，宜采用局部吸聲處理，并設置聲屏障。噪聲源比較多且分散的場(chǎng)所（辦公室等）等場(chǎng)所宜做吸聲處理。</span><br style="font-size: medium; white-space: normal;"/></p> </div> <div id="lbthnrf" class="details_tui clearfix"> <div id="rjxrxjt" class="fl"> </div> </div> <div id="lt3331x" class="case_tui clearfix"> <p>熱點(diǎn)資訊</p> <div id="x3xhbhn" class="case_tui_size"> <div id="1nztrrx" class="clearfix"> <a href="/list_5/120.html" >樓頂空調機組噪音治理方案</a> <span>2022-08-08</span> </div> <div id="jlddzfx" class="clearfix"> <a href="/list_5/119.html" >冷卻塔降噪方案設計</a> 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