Virginia Tech Università di Roma La Sapienza
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Dynamics 4/5 - Damping ratios

 

 

When the dissipation increases there a maximum in the damping ratio relative to the coupled vibration mode, the lower branch in the plot.


The electrical dissipation D has to be large enough to assure damping but small enough to not uncouple the eigenvectors, allowing the flux of mechanical into electrical energy! The optimal value is around D = 1.8 C.



For B = A, and D = 1.8 C, the plot represent the time-evolutions of the energies (colored as done before). Once the mechanical energy is transformed into its electrical form, it is now dissipated, till a complete rest of the system.


 

The colors represent mechanical and electrical contents of the eigenvectors.

 

 

 

 

 

 

 

click to animate the figure