设备层楼板的声强测试与分析

来源 :噪声与振动控制 | 被引量 : 0次 | 上传用户:ciedan
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
通过对高层建筑设备层内空调水泵隔振工程实例分析,通过对设备层楼板的声强阵列测量,取得楼板表面法向辐射的声强分布图,经过分析,发现设备层楼板存在空气声传播途径。据此确定楼板隔声缺陷及其相对位置,为减低设备层楼下房间的噪声声级,取得较好的效果。
其他文献
We have developed an asymmetric ring opening reaction of azabenzonorbornadiene with substituted piperazine. By increasing the amount of catalyst (from 2.5 to 5%
Based on 1971-2005 monthly mean maximum/minimum temperature,wind speed,relative humidity,sunshine duration,and precipitation data at 25 stations over the Tibeta
三维地形实时渲染由于数据量大,一般显示时不易全部显示所有模型,而是根据视距和地形情况,动态的改变地形显示的层次细节。本文研究基于层次细节LOD的ROAM算法及算法的加块改进来实现对地形的实时渲染。
The study is a first attempt to prepare bulk NiTi/NiTi shape memory alloy (SMA) laminates with a macroscopic heterogeneous composition by explosive welding and
The influences of Co-addition on phase transformation behavior and mechanical properties of TiNi alloys were investigated. Results indicate that, as a substitut
Much attention should be paid to the permeability of broken rocks in goafs for the sake of water preservation in mining and to prevent disasters. Using a specia
The TiO2-Co-TiO2 sandwich films were successfully grown on glass and silicon substrata making alternate use of radio frequency reactive magnetron sputtering and
A serious wheel out-of-round phenomenon exists in a certain subway vehicle in China. More seriously, the vertical vibration of car body of this subway vehicle w
The compression creep deformation of the high volume fraction of SiC particles reinforced Al-Mg-Si composite fabricated by pressure-less infiltration was invest
Some fundamental studies on the preparation, structure and optical properties of NbN films were carried out. NbN thin films were deposited by DC reactive magnet