轻型木结构建筑减振降噪试验研究  

Experimental Study on Vibration and Noise Reduction of Light Timber Buildings

作　　者：杨静[1] 饶鑫[1] 王正 付海燕 丁叶蔚 YANG Jing;RAO Xin;WANG Zheng;FU Hai-yan;DING Ye-wei(Department of Landscape Architecture,Jiangsu Vocational College of Agriculture and Forestry,Jurong 212400,China;College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]江苏农林职业技术学院风景园林学院,句容212400 [2]南京林业大学材料科学与工程学院,南京210037

出　　处：《林产工业》2020年第4期19-24,共6页China Forest Products Industry

基　　金：2019年度江苏省高等学校自然科学研究面上项目资助(19KJD220001);2019年江苏农林职业技术学院科技项目资助(2019kj019)。

摘　　要：为促进木结构建筑减振降噪研究,以一栋普通轻型木结构建筑和一栋葡萄牙软木优化轻型木结构建筑为研究对象,采用瞬态激励法和现场声压级法,分别测试两栋建筑的动力参数(频率、峰值加速度、阻尼比)和隔声量,并进行相关分析。结果表明:两种轻型木结构建筑均符合舒适度要求,同时软木优化轻型木结构建筑的平均阻尼比比普通轻型木结构建筑高1.6%;在关闭门窗,交通噪声源和扬声器噪声源共同作用情况下,软木优化结构建筑的平均隔声量比普通结构高4.6 dB(A);其中软木优化结构的减振降噪性能好于普通轻型木结构建筑,可以明显改善木结构建筑楼盖振动特性和隔声效果。上述以期为轻型木结构建筑的减振降噪优化设计工作提供技术支撑,具有工程应用价值。In order to better promote the development of vibration and noise reduction of wood construction,in this study,an ordinary light timber building and a Portuguese cork optimized light timber building were compared as research objects.The dynamic parameters(natural frequency,acceleration peak,damping ratio)and sound insulation capacity of the two buildings were tested by transient excitation method and field sound pressure level method,and the correlation analysis was carried out.The results showed that the average damping ratio of softwood optimized light timber building is 1.6%higher than that of ordinary light timber building.With doors and windows closed,traffic noise sources and loudspeaker sources acting together,the average sound insulation capacity of cork optimized building is 4.6 dB(A)higher than that of ordinary building.Among them,the vibration and noise reduction performance of cork optimized structure is much better than that of ordinary structure,which can improve the ground vibration characteristics and sound insulation effect of timber building significantly.This study is expected to provide technical support for the optimal design of vibration and noise reduction of light timber buildings,which has the engineering application value.

关 键 词：轻型木结构建筑 楼板结构 外墙结构 固有频率 峰值加速度 阻尼比 隔声量 

分 类 号：TS63[轻工技术与工程] TU366.2[建筑科学—结构工程]