PARAM, ALPHA1FL

Bulk Data Entry Adds Rayleigh damping to viscous damping for fluid mesh.

Parameter Values Description
ALPHA1FL <Real>

Default = 0.0

 PARAM, ALPHA1FL is used in frequency and transient response analysis.

If PARAM, ALPHA1FL and/or PARAM, ALPHA2FL are not equal to zero, then Rayleigh damping is added to the viscous damping. ALPHA1FL is the scale factor applied to the mass matrix and ALPHA2FL to the fluid stiffness matrix as in:

[ B ' ] = [ B ] + A L P H A 1 F L ⋅ [ M ] + A L P H A 2 F L ⋅ [ K ] MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbwvMCKf MBHbqefqvATv2CG4uz3bIuV1wyUbqedmvETj2BSbqefm0B1jxALjhi ov2DaebbnrfifHhDYfgasaacH8srps0lbbf9q8WrFfeuY=Hhbbf9v8 qqaqFr0xc9pk0xbba9q8WqFfea0=yr0RYxir=Jbba9q8aq0=yq=He9 q8qqQ8frFve9Fve9Ff0dmeaacaGacmGadaWaaiqacaabaiaafaaake aadaWadaqaaiaadkeacaGGNaaacaGLBbGaayzxaaGaeyypa0ZaamWa aeaacaWGcbaacaGLBbGaayzxaaGaey4kaSIaamyqaiaadYeacaWGqb GaamisaiaadgeacaaIXaGaamOraiaadYeacqGHflY1daWadaqaaiaa d2eaaiaawUfacaGLDbaacqGHRaWkcaWGbbGaamitaiaadcfacaWGib GaamyqaiaaikdacaWGgbGaamitaiabgwSixpaadmaabaGaam4saaGa ay5waiaaw2faaaaa@5885@