用扭摆测量获取材料非线性内耗参数的计算方法  

A CALCULATION METHOD TO OBTAIN NONLINEAR INTER-NAL FRICTION MATERIAL PARAMETERS FOR THE MEASUREMENT WITH TORSIONAL PENDULUM

作　　者：孙宗琦[1] 阎德勤[1] 

机构地区：[1]中国科学院金属研究所,沈阳110015

出　　处：《物理学报》1993年第4期592-596,共5页Acta Physica Sinica

摘　　要：在小内耗并且内耗参数只与切变振幅相关的前提下,采用分析力学方法求出由单自由度自由衰减振动扭摆位移采样值,获取材料非线性内耗和切变模量参数的计算方法。Assuming the smallness of the internal friction which depends only on the amplitude of shear strain, based on analytical mechanics, we developed a calculation method to obtain non-linear material parameters of internal fiction and shear modulus from the sampled data of tor-sional displacements of the free-decay oscillation for the torsional pendulum.

关 键 词：扭摆 内耗 非线性 材料 计算方法 

分 类 号：TG111.7[金属学及工艺—物理冶金]