粘弹性层合梁中弯曲波的弥散与衰减

本文借助于粘弹性动力学的相应原理,将层合梁的微结构理论引进到粘弹性层合梁。依据用应力波方法测定的粘弹性本构关系,计算了粘弹性层合梁中弯曲波的相速度谱与衰减谱。与实验结果的比较表明,本文方法对相速度谱的予测具有足够的精度,对衰减谱的予测有待于进一步验证。

Dispersion and Attenuation of Bending Wave of Viscoelastic Laminated Beams

Microstructure theory of laminated beam was extent to the viscoelastic laminated beam with the aid of correspondence prindple of viscoelastic dynamics. The phase velosity spectrum and attenuation spectrum was computed on the basis of viscoelastic constitutive relation measured with wave propagation methods. The compareson between computed and tested results indicate that, pradication of phase velosity spectrum with method proposed in this paper posses enough precision and the predication of attenuation spectrum awiat funther test and verify.