sn0wy
Dec2-08, 10:05 PM
equations of motions for 3DOFs obtained.
but how do i solve for e 6 unknows: m1 m2 m3 k1 k2 k3 using the ECP system?
Equations formulated as below:
[A] { m1 }
{ m2 }
{ m3 } = [F]
{ k1 }
{ k2 }
{ k3 }
where [A] is a 6 by 9 matrix: first 3 rows at freq w1, next 3 rows at w2, last 3 rows at w3
[F] (1 by 9 matrix) : is the applied force for each sinosindual excitation under 3 diff frequencies.
Natural freq of this 3DOFs was obtained and excited with sinosindual by input-ing at each of these 3 natural frequency (hence able to find amplitude of these vibrations, but so many amplitudes, which 1 to select???). And how should I go about solving the 6 unknowns?
Can anyone help me?
Thanks.
but how do i solve for e 6 unknows: m1 m2 m3 k1 k2 k3 using the ECP system?
Equations formulated as below:
[A] { m1 }
{ m2 }
{ m3 } = [F]
{ k1 }
{ k2 }
{ k3 }
where [A] is a 6 by 9 matrix: first 3 rows at freq w1, next 3 rows at w2, last 3 rows at w3
[F] (1 by 9 matrix) : is the applied force for each sinosindual excitation under 3 diff frequencies.
Natural freq of this 3DOFs was obtained and excited with sinosindual by input-ing at each of these 3 natural frequency (hence able to find amplitude of these vibrations, but so many amplitudes, which 1 to select???). And how should I go about solving the 6 unknowns?
Can anyone help me?
Thanks.