ON GROUP VELOCITY OF ELASTIC WAVES, IN AN ANISOTROPIC PLATE |
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| Authors: | Y CHENL GUO |
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| Institution: | Department of Physics, Tsinghua University, Beijing, 100084, People's Republic of Chinaf1chenyu@tsinghua.edu.cnf1 |
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| Abstract: | A proof is offered for the equivalence of the group velocity and the energy velocity for elastic waves in a free anisotropic homogenous plate. The proof is valid in the case where the group velocity may be negative while the wave number is positive. |
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