Amplitude Saturation in Beta Cephei Models - Preliminary Results
  Using nonlinear hydrocodes we have calculated single mode saturation amplitudes for beta Cephei models. Predicted saturation amplitudes are systematically higher than amplitudes observed in beta Cephei variables, even in monoperiodic ones. We argue that collective saturation of the pulsation instability by a dozen or so acoustic modes brings the theoretical amplitudes to the observed level. 
Radoslaw Smolec, Pawel Moskalik (Copernicus Astronomical Centre)