  The issue of the equilibrium-range formation in the wind-wave spectrum is
studied by a direct numerical simulation. The evolution equation of wind-wave
spectrum is numerically solved with using an exact calculation of the
Hasselmann kinetic integral and involving various modifications of known
parametrizations for the wave-pumping mechanism due to wind and the
wave-dissipation mechanism due viscosity of the upper layer. It is shown that
the balance of the last two mechanisms is responsible for a formation of
stationary part of the wind-wave spectrum. This balance allows establishing any
prescribed form of the equilibrium part of the spectrum, if the proper
representations of input and dissipation mechanisms are chosen.
