摘要
研究了各向异性介质中的谐和粘弹性波的衰减特性,并利用其特征值理论证明了粘弹性介质总是耗散的,在其中传播的波将以指数形式衰减,即耗散介质总具有线性稳定性,而且随着阻尼的增大,介质消耗的能量将越大,波矢量的虚实部比是介质耗散大小的度量。
<Abstrcat> The attenuation characteristics of harmonic waves in linear viscoelastic anisotropic medium are investigated by employing eigenvalue theory. It is demonstrated that the viscoelastic medium always dissipates energy and waves propagating in it will attenuate in the exponent form, showing that the dissipative medium is of linear stability. It is found that the larger the damp is, the more the energy dissipates, and this kind of energy dissipation can be measured by the ratio of imaginary and real parts of the wave vector.
出处
《福建工程学院学报》
CAS
2005年第3期223-225,共3页
Journal of Fujian University of Technology
关键词
粘弹性
波
能量
特征方程
viscoelasticity
wave
energy
characteristic equation
