约束阻尼混凝土板对汽机基础中间平台减振降噪的研究  

Study on Vibration and Noise Reduction of Turbine-Generator Foundation Intermediate Layer Platform by a Constrained Damping Concrete Plate

作　　者：李文君[1] 屈铁军[1] 

机构地区：[1]北方工业大学建筑工程学院,北京100144

出　　处：《北方工业大学学报》2008年第3期84-88,94,共6页Journal of North China University of Technology

基　　金：国家自然科学基金资助项目(50678001);北京市教委科技发展计划重点资助项目(KZ200710009005)

摘　　要：针对汽机基础中间平台的减振问题,在相同条件下对普通混凝土板与约束阻尼混凝土板分别进行振动与噪声对比试验,得出了两块板的模态阻尼比与噪声测量数据.数据结果表明,约束阻尼混凝土板的阻尼效果在不同频率、不同振型下是不同的,对板本身受激励所发出的噪声也有一定的降噪效果.In dealing with the vibration damping of the intermediate layer platform of the turbine-generator foundation, under the same conditions, comparative experiments on vibration and noise between ordinary concrete plate and constrained damping concrete plate are carried out. The modal damping ratios and the noise data obtained from the experiments show that under different frequencies and different vibration mode shapes, the damping effect of constrained damping concrete plate is different. Moreover, some effect on noise reduction is also observed during the excitations of the plate itself.

关 键 词：约束阻尼混凝土板 模态阻尼比 减振降噪 试验 

分 类 号：TB535.1[理学—物理]