冷卻塔落水噪聲范圍

1、聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)的(de)(de)(de)(de)(de)(de)距(ju)(ju)(ju)離(li)(li)(li)衰(shuai)(shuai)(shuai)減(jian)(jian)規律(lv)(lv)(lv)落水(shui)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)隨(sui)距(ju)(ju)(ju)離(li)(li)(li)的(de)(de)(de)(de)(de)(de)衰(shuai)(shuai)(shuai)減(jian)(jian)特(te)性(xing)(xing)符(fu)合半球面(mian)(mian)波(bo)在(zai)(zai)傳播(bo)(bo)過程中(zhong)(zhong)隨(sui)著能量分(fen)(fen)(fen)(fen)布的(de)(de)(de)(de)(de)(de)擴(kuo)大(da)(da)(da)而衰(shuai)(shuai)(shuai)減(jian)(jian)的(de)(de)(de)(de)(de)(de)規律(lv)(lv)(lv)，其(qi)(qi)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)距(ju)(ju)(ju)離(li)(li)(li)衰(shuai)(shuai)(shuai)減(jian)(jian)規律(lv)(lv)(lv)為(wei)(wei)(wei)(wei)(wei)(wei)距(ju)(ju)(ju)離(li)(li)(li)每增=20lgr2r1＝6db。落水(shui)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)為(wei)(wei)(wei)(wei)(wei)(wei)內置的(de)(de)(de)(de)(de)(de)一(yi)(yi)片圓形(xing)水(shui)面(mian)(mian)，腔體內聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)通過進風(feng)(feng)(feng)口(kou)(kou)向(xiang)(xiang)外(wai)(wai)(wai)傳播(bo)(bo)，所以(yi)(yi)可將(jiang)(jiang)進風(feng)(feng)(feng)口(kou)(kou)視(shi)(shi)為(wei)(wei)(wei)(wei)(wei)(wei)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)邊緣，其(qi)(qi)龐大(da)(da)(da)特(te)殊的(de)(de)(de)(de)(de)(de)弧面(mian)(mian)出聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)口(kou)(kou)使附近(jin)區域(yu)(yu)”內的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)并(bing)不(bu)(bu)立即按(an)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)距(ju)(ju)(ju)離(li)(li)(li)衰(shuai)(shuai)(shuai)減(jian)(jian)規律(lv)(lv)(lv)衰(shuai)(shuai)(shuai)減(jian)(jian)，在(zai)(zai)這個(ge)由(you)(you)(you)近(jin)及(ji)(ji)遠的(de)(de)(de)(de)(de)(de)附近(jin)區域(yu)(yu)”內存(cun)在(zai)(zai)著一(yi)(yi)個(ge)按(an)面(mian)(mian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)不(bu)(bu)衰(shuai)(shuai)(shuai)減(jian)(jian)及(ji)(ji)至(zhi)(zhi)線(xian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”距(ju)(ju)(ju)離(li)(li)(li)每增加一(yi)(yi)倍(bei)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)能衰(shuai)(shuai)(shuai)減(jian)(jian)3db的(de)(de)(de)(de)(de)(de)距(ju)(ju)(ju)離(li)(li)(li)衰(shuai)(shuai)(shuai)減(jian)(jian)規律(lv)(lv)(lv)的(de)(de)(de)(de)(de)(de)過渡(du)區域(yu)(yu)，只(zhi)有(you)當受(shou)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點(dian)(dian)(dian)(dian)(dian)測(ce)(ce)(ce)(ce)點(dian)(dian)(dian)(dian)(dian)外(wai)(wai)(wai)移至(zhi)(zhi)可將(jiang)(jiang)冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)的(de)(de)(de)(de)(de)(de)環形(xing)進風(feng)(feng)(feng)口(kou)(kou)視(shi)(shi)為(wei)(wei)(wei)(wei)(wei)(wei)一(yi)(yi)個(ge)點(dian)(dian)(dian)(dian)(dian)”以(yi)(yi)外(wai)(wai)(wai)的(de)(de)(de)(de)(de)(de)后方(fang)，聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)才(cai)開(kai)(kai)始(shi)(shi)(shi)按(an)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)距(ju)(ju)(ju)離(li)(li)(li)衰(shuai)(shuai)(shuai)減(jian)(jian)規律(lv)(lv)(lv)衰(shuai)(shuai)(shuai)減(jian)(jian)。于(yu)(yu)是(shi)，在(zai)(zai)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”以(yi)(yi)外(wai)(wai)(wai)的(de)(de)(de)(de)(de)(de)范(fan)(fan)圍(wei)(wei)(wei)(wei)內，只(zhi)要知道某測(ce)(ce)(ce)(ce)點(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)，便(bian)可根據(ju)(ju)上式(shi)求(qiu)得任(ren)一(yi)(yi)點(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)。2、冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)為(wei)(wei)(wei)(wei)(wei)(wei)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)起(qi)(qi)始(shi)(shi)(shi)位(wei)置根據(ju)(ju)已有(you)距(ju)(ju)(ju)離(li)(li)(li)衰(shuai)(shuai)(shuai)減(jian)(jian)實測(ce)(ce)(ce)(ce)資料，分(fen)(fen)(fen)(fen)析各(ge)起(qi)(qi)始(shi)(shi)(shi)位(wei)置d視(shi)(shi)進風(feng)(feng)(feng)口(kou)(kou)為(wei)(wei)(wei)(wei)(wei)(wei)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)邊緣的(de)(de)(de)(de)(de)(de)規律(lv)(lv)(lv)可知，視(shi)(shi)冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)為(wei)(wei)(wei)(wei)(wei)(wei)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)起(qi)(qi)始(shi)(shi)(shi)位(wei)置d可用下式(shi)估算：d＝a124式(shi)中(zhong)(zhong)：a——冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)面(mian)(mian)積，m2。以(yi)(yi)目前我國常(chang)見范(fan)(fan)圍(wei)(wei)(wei)(wei)的(de)(de)(de)(de)(de)(de)2000m2儀化電廠－9000m2吳徑(jing)電廠的(de)(de)(de)(de)(de)(de)冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)為(wei)(wei)(wei)(wei)(wei)(wei)例，其(qi)(qi)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”起(qi)(qi)始(shi)(shi)(shi)位(wei)置d點(dian)(dian)(dian)(dian)(dian)以(yi)(yi)進風(feng)(feng)(feng)口(kou)(kou)底(di)緣為(wei)(wei)(wei)(wei)(wei)(wei)起(qi)(qi)點(dian)(dian)(dian)(dian)(dian)，分(fen)(fen)(fen)(fen)別(bie)(bie)為(wei)(wei)(wei)(wei)(wei)(wei)11、18m及(ji)(ji)23、72m。由(you)(you)(you)此可見，設在(zai)(zai)離(li)(li)(li)塔(ta)(ta)(ta)(ta)(ta)以(yi)(yi)進風(feng)(feng)(feng)口(kou)(kou)底(di)緣為(wei)(wei)(wei)(wei)(wei)(wei)起(qi)(qi)點(dian)(dian)(dian)(dian)(dian)25m以(yi)(yi)外(wai)(wai)(wai)的(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)測(ce)(ce)(ce)(ce)點(dian)(dian)(dian)(dian)(dian)基本上都可將(jiang)(jiang)所有(you)的(de)(de)(de)(de)(de)(de)冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)視(shi)(shi)為(wei)(wei)(wei)(wei)(wei)(wei)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”。3、冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)影(ying)(ying)響(xiang)范(fan)(fan)圍(wei)(wei)(wei)(wei)的(de)(de)(de)(de)(de)(de)評(ping)(ping)估冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)的(de)(de)(de)(de)(de)(de)絕對值在(zai)(zai)工業(ye)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)中(zhong)(zhong)雖然(ran)并(bing)不(bu)(bu)算很(hen)大(da)(da)(da)，而且其(qi)(qi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)能同樣隨(sui)著距(ju)(ju)(ju)離(li)(li)(li)每增加一(yi)(yi)倍(bei)而衰(shuai)(shuai)(shuai)減(jian)(jian)6db點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”，但由(you)(you)(you)于(yu)(yu)其(qi)(qi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)龐大(da)(da)(da)，它(ta)(ta)的(de)(de)(de)(de)(de)(de)衰(shuai)(shuai)(shuai)減(jian)(jian)起(qi)(qi)始(shi)(shi)(shi)距(ju)(ju)(ju)離(li)(li)(li)較遠25m，翻三番便(bian)已到了200m，相對于(yu)(yu)25m處(chu)(chu)(chu)(chu)也(ye)才(cai)降了18db，所以(yi)(yi)其(qi)(qi)影(ying)(ying)響(xiang)范(fan)(fan)圍(wei)(wei)(wei)(wei)遠大(da)(da)(da)于(yu)(yu)一(yi)(yi)般(ban)性(xing)(xing)工業(ye)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。仍以(yi)(yi)2000-9000m2的(de)(de)(de)(de)(de)(de)冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)為(wei)(wei)(wei)(wei)(wei)(wei)例，在(zai)(zai)25m處(chu)(chu)(chu)(chu)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”以(yi)(yi)外(wai)(wai)(wai)測(ce)(ce)(ce)(ce)點(dian)(dian)(dian)(dian)(dian)、以(yi)(yi)進風(feng)(feng)(feng)口(kou)(kou)底(di)緣為(wei)(wei)(wei)(wei)(wei)(wei)起(qi)(qi)點(dian)(dian)(dian)(dian)(dian)實測(ce)(ce)(ce)(ce)所得聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)分(fen)(fen)(fen)(fen)別(bie)(bie)為(wei)(wei)(wei)(wei)(wei)(wei)71、7及(ji)(ji)77、ldba，如按(an)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)距(ju)(ju)(ju)離(li)(li)(li)衰(shuai)(shuai)(shuai)減(jian)(jian)規律(lv)(lv)(lv)即距(ju)(ju)(ju)離(li)(li)(li)每增加一(yi)(yi)倍(bei)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)能衰(shuai)(shuai)(shuai)減(jian)(jian)6db計(ji)，則(ze)50m處(chu)(chu)(chu)(chu)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)應(ying)(ying)分(fen)(fen)(fen)(fen)別(bie)(bie)為(wei)(wei)(wei)(wei)(wei)(wei)65、7及(ji)(ji)71、ldba；100m處(chu)(chu)(chu)(chu)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)應(ying)(ying)分(fen)(fen)(fen)(fen)別(bie)(bie)為(wei)(wei)(wei)(wei)(wei)(wei)59、7及(ji)(ji)65、ldba；200m處(chu)(chu)(chu)(chu)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)應(ying)(ying)分(fen)(fen)(fen)(fen)別(bie)(bie)為(wei)(wei)(wei)(wei)(wei)(wei)53、7及(ji)(ji)59、ldba，220m處(chu)(chu)(chu)(chu)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)用公式(shi)推算則(ze)應(ying)(ying)分(fen)(fen)(fen)(fen)別(bie)(bie)為(wei)(wei)(wei)(wei)(wei)(wei)52、9及(ji)(ji)58、3dba。這就(jiu)是(shi)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)影(ying)(ying)響(xiang)范(fan)(fan)圍(wei)(wei)(wei)(wei)力度的(de)(de)(de)(de)(de)(de)大(da)(da)(da)致評(ping)(ping)估，它(ta)(ta)包含了目前常(chang)見的(de)(de)(de)(de)(de)(de)各(ge)類大(da)(da)(da)小塔(ta)(ta)(ta)(ta)(ta)型范(fan)(fan)圍(wei)(wei)(wei)(wei)。借助此法，我們便(bian)可根據(ju)(ju)10－25m處(chu)(chu)(chu)(chu)各(ge)塔(ta)(ta)(ta)(ta)(ta)與其(qi)(qi)塔(ta)(ta)(ta)(ta)(ta)型大(da)(da)(da)小相應(ying)(ying)的(de)(de)(de)(de)(de)(de)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”起(qi)(qi)始(shi)(shi)(shi)位(wei)置以(yi)(yi)遠測(ce)(ce)(ce)(ce)點(dian)(dian)(dian)(dian)(dian)實測(ce)(ce)(ce)(ce)所得聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)，評(ping)(ping)估各(ge)種(zhong)塔(ta)(ta)(ta)(ta)(ta)型單塔(ta)(ta)(ta)(ta)(ta)的(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)影(ying)(ying)響(xiang)范(fan)(fan)圍(wei)(wei)(wei)(wei)力度。但這只(zhi)是(shi)一(yi)(yi)種(zhong)理(li)想(xiang)條件下的(de)(de)(de)(de)(de)(de)簡便(bian)、粗略的(de)(de)(de)(de)(de)(de)評(ping)(ping)估方(fang)法，在(zai)(zai)實際廠況環境(jing)中(zhong)(zhong)，由(you)(you)(you)于(yu)(yu)受(shou)池水(shui)水(shui)位(wei)變(bian)化、淋水(shui)密度變(bian)化、地表地形(xing)、障礙物(wu)分(fen)(fen)(fen)(fen)布、塔(ta)(ta)(ta)(ta)(ta)群分(fen)(fen)(fen)(fen)布、風(feng)(feng)(feng)向(xiang)(xiang)風(feng)(feng)(feng)力、氣(qi)(qi)候氣(qi)(qi)溫及(ji)(ji)其(qi)(qi)它(ta)(ta)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)，各(ge)類冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)(de)(de)(de)實際分(fen)(fen)(fen)(fen)布、衰(shuai)(shuai)(shuai)減(jian)(jian)規律(lv)(lv)(lv)將(jiang)(jiang)會有(you)所出人。據(ju)(ju)對吳徑(jing)電廠9000m2冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)的(de)(de)(de)(de)(de)(de)落水(shui)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)進行(xing)的(de)(de)(de)(de)(de)(de)實測(ce)(ce)(ce)(ce)［4］，在(zai)(zai)距(ju)(ju)(ju)塔(ta)(ta)(ta)(ta)(ta)220m外(wai)(wai)(wai)的(de)(de)(de)(de)(de)(de)受(shou)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點(dian)(dian)(dian)(dian)(dian)所測(ce)(ce)(ce)(ce)得的(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)值為(wei)(wei)(wei)(wei)(wei)(wei)55、4－58、3dba另一(yi)(yi)次測(ce)(ce)(ce)(ce)試結(jie)果為(wei)(wei)(wei)(wei)(wei)(wei)61、9dba，估計(ji)受(shou)順風(feng)(feng)(feng)影(ying)(ying)響(xiang)，與我們以(yi)(yi)25m處(chu)(chu)(chu)(chu)實測(ce)(ce)(ce)(ce)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)為(wei)(wei)(wei)(wei)(wei)(wei)依據(ju)(ju)推算220m處(chu)(chu)(chu)(chu)為(wei)(wei)(wei)(wei)(wei)(wei)58、3dba的(de)(de)(de)(de)(de)(de)結(jie)果十分(fen)(fen)(fen)(fen)吻合。圖(tu)2表示冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)范(fan)(fan)圍(wei)(wei)(wei)(wei)。從圖(tu)2中(zhong)(zhong)可以(yi)(yi)看出，由(you)(you)(you)于(yu)(yu)冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)龐大(da)(da)(da)，在(zai)(zai)距(ju)(ju)(ju)進風(feng)(feng)(feng)口(kou)(kou)10－25m范(fan)(fan)圍(wei)(wei)(wei)(wei)內，噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)衰(shuai)(shuai)(shuai)減(jian)(jian)很(hen)慢，其(qi)(qi)中(zhong)(zhong)面(mian)(mian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”距(ju)(ju)(ju)離(li)(li)(li)范(fan)(fan)圍(wei)(wei)(wei)(wei)內聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)衰(shuai)(shuai)(shuai)減(jian)(jian)的(de)(de)(de)(de)(de)(de)理(li)論值為(wei)(wei)(wei)(wei)(wei)(wei)零。但對于(yu)(yu)尺度很(hen)小1m左右的(de)(de)(de)(de)(de)(de)一(yi)(yi)般(ban)性(xing)(xing)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)，由(you)(you)(you)于(yu)(yu)不(bu)(bu)存(cun)在(zai)(zai)面(mian)(mian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”及(ji)(ji)線(xian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)衰(shuai)(shuai)(shuai)減(jian)(jian)形(xing)態，所以(yi)(yi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)的(de)(de)(de)(de)(de)(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)(ji)(ji)(ji)一(yi)(yi)開(kai)(kai)始(shi)(shi)(shi)就(jiu)按(an)點(dian)(dian)(dian)(dian)(dian)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)(yuan)(yuan)(yuan)”的(de)(de)(de)(de)(de)(de)衰(shuai)(shuai)(shuai)減(jian)(jian)速率迅速下降。文章(zhang)出自lxlqt冷(leng)(leng)(leng)(leng)(leng)卻(que)(que)(que)(que)(que)塔(ta)(ta)(ta)(ta)(ta)落水(shui)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)范(fan)(fan)圍(wei)(wei)(wei)(wei)、html

玻璃鋼管技術幾點基本要求

1、樹脂(zhi)所(suo)用(yong)不飽和聚脂(zhi)樹脂(zhi)應(ying)(ying)符(fu)合(he)GBT8237的規(gui)(gui)(gui)(gui)定(ding)(ding)。所(suo)用(yong)環氧樹脂(zhi)應(ying)(ying)符(fu)合(he)GBT13657的規(gui)(gui)(gui)(gui)定(ding)(ding)。用(yong)作(zuo)引(yin)水管(guan)(guan)及飲用(yong)水管(guan)(guan)的樹脂(zhi)衛(wei)生(sheng)標準必須符(fu)合(he)GB13115的規(gui)(gui)(gui)(gui)定(ding)(ding)。2、增強材料所(suo)用(yong)無(wu)(wu)堿無(wu)(wu)捻玻璃纖維紗(sha)應(ying)(ying)符(fu)合(he)GBT277的規(gui)(gui)(gui)(gui)定(ding)(ding)。所(suo)用(yong)中(zhong)堿無(wu)(wu)捻玻璃纖維紗(sha)應(ying)(ying)符(fu)合(he)GBT278的規(gui)(gui)(gui)(gui)定(ding)(ding)。3、填料SiO2含量(liang)大于(yu)95%，含濕(shi)量(liang)應(ying)(ying)小(xiao)(xiao)于(yu)0、2%。CaCO3含量(liang)大于(yu)98%，含濕(shi)量(liang)應(ying)(ying)小(xiao)(xiao)于(yu)0、2%。4、外觀質量(liang)管(guan)(guan)的內表(biao)面(mian)應(ying)(ying)光(guang)滑平整(zheng)，無(wu)(wu)龜裂、分(fen)層(ceng)、針孔、雜質、貧(pin)膠區(qu)及氣泡，管(guan)(guan)端面(mian)應(ying)(ying)平齊、無(wu)(wu)毛(mao)刺。管(guan)(guan)外表(biao)面(mian)無(wu)(wu)明顯缺陷。5、尺寸直徑(jing)偏差：外徑(jing)系列應(ying)(ying)符(fu)合(he)表(biao)1中(zhong)規(gui)(gui)(gui)(gui)定(ding)(ding)，內徑(jing)系列應(ying)(ying)符(fu)合(he)表(biao)2中(zhong)規(gui)(gui)(gui)(gui)定(ding)(ding)。外徑(jing)系列RPM管(guan)(guan)尺寸表(biao)1