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مکانیک::
ضریب میرایی
However, it is not always possible to determine the most effective damping coefficient.
Therefore, the damping coefficient is determined at each time step by using the Adaptive Dynamic Relaxation (ADR) scheme introduced by Underwood (1983).
where D is the fictitious diagonal density matrix and c is the damping coefficient whose values are determined by Greschgorin's theorem (Underwood 1983) and Rayleigh's quotient, respectively.
The density matrix, D, damping coefficient, c, and time step size , At, do not have to be physical quantities.
As described by Underwood (1983), the damping coefficient can be determined by using the lowest frequency of the system.
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