A CALCULATION METHOD TO OBTAIN NONLINEAR INTER-NAL FRICTION MATERIAL PARAMETERS FOR THE MEASUREMENT WITH TORSIONAL PENDULUM
用扭摆测量获取材料非线性内耗参数的计算方法

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.