阻尼和谐振频率对浮筑楼板隔声性能的影响  

Influence of damping and resonance frequency on sound insulation performance of floating floor

作　　者：王军强[1] WANG Junqiang(School of Architectural Construction,Jiangsu Vocational Institute of Architectural Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]江苏建筑职业技术学院建筑建造学院,江苏徐州221116

出　　处：《江苏建筑职业技术学院学报》2020年第3期15-18,共4页Journal Of Jiangsu Vocational Institute of Architectural Technology

基　　金：江苏省高等学校自然科学研究重大项目(17KJA560002);江苏省优秀科技创新团队“绿色建筑保温隔声技术”项目。

摘　　要：针对住宅钢筋混凝土楼板撞击声隔声性能较差的问题,对楼板进行隔声降噪设计,降低撞击声压,提高楼板结构传声声学性能.采用浮筑隔声楼板,通过在楼板上铺设隔声减振垫层形成隔声楼板体系,结合工程设计需求,选择不同的弹性减振材料和浮筑层.分析了弹性减振材料阻尼比、损耗因子、谐振频率等对隔声性能的影响;并结合样品试验,进一步分析了弹性减振材料的性能参数,包括荷载下厚度、动态刚度、谐振频率、质量密度等变化对浮筑隔声楼板声学性能的影响,试验结果和理论分析吻合度较高.In view of the poor sound insulation performance of residential floor,sound insulation and noise reduction design is carried out to reduce the impact sound pressure and improve the acoustic performance of floor structure.The floating sound insulation floor is adopted,and the sound insulation floor system is formed by laying sound insulation and vibration damping cushion on the floor.According to the engineering design requirements,different elastic damping materials and floating floors are selected.The influence of damping ratio,loss factor and resonant frequency of elastic damping material on sound insulation performance is analyzed.Combined with sample test,the performance parameters of elastic damping material,including thickness,dynamic stiffness,resonance frequency and mass density,on acoustic performance of floating sound insulation floor are analyzed.The test results are in good agreement with theoretical analysis.

关 键 词：隔声浮筑楼板 动态刚度 谐振频率 损耗因子 撞击声压改善量 

分 类 号：TU241[建筑科学—建筑设计及理论]