NOPD单自由度体系阻尼特性的实验研究  

Experimental studies on damping characteristics of a SDOF NOPD system

作　　者：赵玲[1] 刘平[1] 卢媛媛[1] 

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225009

出　　处：《世界地震工程》2009年第3期34-38,共5页World Earthquake Engineering

基　　金：国家自然科学基金项目(50778157);江苏省教育厅科研基金项目(06KJD130207)

摘　　要：针对非阻塞性微颗粒阻尼(NOPD)单自由度体系,通过实验研究颗粒填充率、颗粒材料类型、振动方向以及空腔形状等因素对结构阻尼特性的影响,并根据实验数据对阻尼特性进行了拟合分析。实验结果表明:颗粒填充率是结构阻尼的显著影响因素,颗粒沿空腔横向产生振动时的阻尼大于沿纵向振动时的阻尼,采用长方形空腔形状更有利于结构取得好的颗粒阻尼效应。当填充率相等时,采用铁粉颗粒比采用砂粒对结构阻尼的增大效果更好。实验结果可为以后进一步的理论分析提供依据。For a single edgree of freedom （SDOF） non-obstructive particle damping （NOPD） system, the influences of factors such as particle filling ratio, particle material type, vibration direction and cavity shape etc on the struc- tural damping characteristics are experimentally investigated. The fitting analysis is performed based on the experi- mental data. Tested results indicate that the particle filling ratio affects the structural damping significantly and that higher damping can be acquired if particles vibrate along the lateral direction of cavity rather than along the longitu- dinal direction. The adoption of rectangular cavity shape is beneficial to the better particle damping effects. Under identical particle filling ratios, the application of iron powder provides higher structural damping than sand grain. The experimental results may provide the basis for further theoretical analysis in future.

关 键 词：非阻塞性微颗粒阻尼 单自由度体系 填充率 空腔形状 

分 类 号：O328[理学—一般力学与力学基础] P315.966[理学—力学]