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Wave propagation in a generalized thermoelastic plate using eigenvalue approach

机译:使用特征值方法的广义热弹性板中的波传播

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In the present work, we obtain a dispersion relation for Rayleigh-Lamb wave propagation in a plate of thermoelastic material. For this aim, we consider the theory of generalized thermoelasticity with one relaxation time. The thickness of the plate is taken to be finite and the faces of the plate are assumed to be isothermal and free from stresses. We obtain the analytical solution for the temperature, displacement components, and stresses using an eigenvalue approach. Finally, we derive a dispersion relation for the plate in closed form taking into account isothermal boundary conditions for wave mode propagation. To obtain the phase velocity and attenuation coefficients of propagating wave mode, we use the function iteration numerical scheme to solve the complex dispersion relation. The phase velocity and attenuation coefficients for the first five modes of waves are represented graphically for Lord-Shulman and classical coupled dynamical theories.
机译:在目前的工作中,我们获得了瑞利-兰姆波在热弹性材料板中传播的色散关系。为此,我们考虑具有一个松弛时间的广义热弹性理论。认为板的厚度是有限的,并且假定板的表面是等温的并且没有应力。我们使用特征值方法获得了温度,位移分量和应力的解析解。最后,我们考虑了波模传播的等温边界条件,得出了封闭形式的板的色散关系。为了获得传播波模式的相速度和衰减系数,我们使用函数迭代数值方案来求解复杂的色散关系。对于Lord-Shulman和经典耦合动力学理论,用图形表示了波的前五个模式的相速度和衰减系数。

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