電(dian)(dian)(dian)梯(ti)噪聲(sheng)(sheng)(sheng)(sheng)多由電(dian)(dian)(dian)梯(ti)機房主(zhu)承重(zhong)墻與住戶共用承重(zhong)墻或電(dian)(dian)(dian)梯(ti)相(xiang)關設(she)備與墻體(ti)斷開不徹底存在鋼性(xing)連接,形成(cheng)“聲(sheng)(sheng)(sheng)(sheng)橋”引起噪聲(sheng)(sheng)(sheng)(sheng)對人的(de)干擾。《住宅設(she)計(ji)規范(fan)》明文(wen)規定,電(dian)(dian)(dian)梯(ti)主(zhu)機支承鋼梁必須伸(shen)入電(dian)(dian)(dian)梯(ti)井道承重(zhong)墻上(shang),設(she)計(ji)上(shang)的(de)盲(mang)點為電(dian)(dian)(dian)梯(ti)振動噪聲(sheng)(sheng)(sheng)(sheng)傳播(bo)途徑,鋼性(xing)連接延墻體(ti)、頂面、柱子提供了強有效的(de)傳聲(sheng)(sheng)(sheng)(sheng)介質。目(mu)前一些設(she)計(ji)承建公司已經(jing)意識到上(shang)述問題(ti)進行了設(she)計(ji)上(shang)的(de)修改(gai),把本身(shen)設(she)計(ji)時(shi)通(tong)過錯層或設(she)置樓梯(ti)間分隔等方式分離了機房承重(zhong)墻與業主(zhu)家內主(zhu)墻體(ti)是(shi)可以解決由直(zhi)接剛性(xing)連接形成(cheng)“聲(sheng)(sheng)(sheng)(sheng)橋”引起的(de)電(dian)(dian)(dian)梯(ti)振動噪聲(sheng)(sheng)(sheng)(sheng)問題(ti)。
機房結構性傳聲:由電梯主機及機房控制柜發出,電梯機房內的主承重粱主墻與業主家內的主墻為一公共墻體或都是剛性結構連體,因此構成電梯噪聲主要傳播“聲橋”,電梯在高速運行及停車時的低頻振動及噪音通過聲橋傳入住戶室內。目前較為普遍的室內電梯噪聲污染案例類型,以頂層或次頂層的住戶受噪聲影響,其它層樓受影響不大,通過增設低頻阻尼復合減振裝置降低振動傳遞率把噪聲降低至使人舒適的聲環境以下。