giuma
Guest
Bye to all,
I am doing a transient analysis with ansys apdl 13 and I have a problem: to do the analysis the program requires me the depreciation constants of rayleigh (alpha and beta), only that I do not know how to calculate them; I saw that there are formulas:
(=2 (ω1 ω2 (ω2 ξ1-ω1 ξ2)/(ω2^2-ω1^2 )
β=2 (ω2 ξ2-ω1 ξ1)/(ω2^2-ω1^2 )
But to carry out these formulas I must know at least two values of ω and ξ for my system. Does anyone know how I can get them? because in reality the only input data I have available is the file with site accelerations according to time. .
I am doing a transient analysis with ansys apdl 13 and I have a problem: to do the analysis the program requires me the depreciation constants of rayleigh (alpha and beta), only that I do not know how to calculate them; I saw that there are formulas:
(=2 (ω1 ω2 (ω2 ξ1-ω1 ξ2)/(ω2^2-ω1^2 )
β=2 (ω2 ξ2-ω1 ξ1)/(ω2^2-ω1^2 )
But to carry out these formulas I must know at least two values of ω and ξ for my system. Does anyone know how I can get them? because in reality the only input data I have available is the file with site accelerations according to time. .