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Wave propagation within some non-homogeneous continua

机译:波在某些非均匀连续体内的传播

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We investigate the elastic wave propagation within a non-homogeneous continuum according to W. Noll. After some preliminaries in geometry approach suggested by E. Cartan, the linear momentum equation of so-called weakly continuous medium is written. A first example illustrates the modal analysis of an axisymmetric non-homogeneous thick tube. The overall solution is the product of an attenuating exponential response with Kummer's functions. The second example deals with a Timoshenko beam involving transversal displacement and angular rotation of section. We observe the presence of various waves with spatial attenuation, either for the displacement or the section rotation, together with the occurring waves at different scale levels.
机译:我们根据W. Noll调查弹性波在非均匀连续体内的传播。在E. Cartan提出了一些几何方法的初步知识之后,写了所谓的弱连续介质的线性动量方程。第一个示例说明了轴对称非均质厚管的模态分析。整体解决方案是衰减系数响应与Kummer函数的乘积。第二个示例处理的是Timoshenko梁,涉及截面的横向位移和角旋转。我们观察到存在各种具有空间衰减的波,无论是位移还是截面旋转,以及在不同比例级别上出现的波。

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