Use of the energy flow concept in vibration design

Stationary harmonic vibration of damped elastic structures is studied. Energy how in structures is calculated using results from ordinary harmonic response finite element analyses. In two examples both global and local quantities, such as the supplied power and the mechanical intensity, are calculated and displayed. Both proportionally and nonproportionally damped structures are studied. The magnitude of the real part of the mechanical intensity is, in the examples, seen to have roughly the same spatial distribution as the strain energy density, The potential use of the mechanical intensity as a tool for identifying transmission paths for energy is demonstrated.