用强迫振动速度响应曲线分析地基阻尼比  

Using the velocity response curve under forced vibration to analyze subsoil damping ratio

作　　者：吴邦达 应怀樵[2] 

机构地区：[1]中国兵器工业第五设计研究院,北京100053 [2]北京东方振动和噪声技术研究所,北京100085

出　　处：《建筑结构》2010年第8期103-105,98,共4页Building Structure

摘　　要：当地基阻尼比较大,位移及加速度幅频响应曲线峰点不明显或消失时,点峰法及多峰法均不能求阻尼比。但是只要速度曲线尚有峰点,就可用点峰法导出阻尼比公式,并利用变换,将其与位移、加速度曲线求阻尼比之间的关系互相沟通,并得出参振质量及地基刚度。Being the peak of displacement and acceleration curves not clear or disappearance,if the subsoil damping ratio is large,it can not be obtained by using point-peak and multi-peak method.But if there is a peak in the velocity curve,it may be applied to derive the formula of subsoil damping ratio by using point-peak method.This formula may be linked up with transforming from velocity curve into displacement and acceleration curves for getting subsoil damping ratio,and participating vibrational mass and subsoil stiffness may be obtained also.

关 键 词：点峰法 多峰法 速度曲线 地基阻尼比 变换 

分 类 号：TU435[建筑科学—岩土工程]