Mathcad - Dinamica de Estructuras
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Transcript of Mathcad - Dinamica de Estructuras
m 1
k 10 c 0.125 m k
s1c
m
c2
m2
4 k
m 0.395 6.312i pos0 3
vel0 0
s2c
m
c2
m2
4 k
m 0.395 6.312i
A1
A2
1
s1
1
s2
1 pos0
vel0
1.5 0.094i
1.5 0.094i
x t( ) A1 es1 t
A2 es2 t
x 0( ) 3
0 2 4 6 8 1010
5
0
5
10
x t( )
t
Sistema forzado sin amortiguamiento
ωn 40 ω 158 po 10 k 10 uo 0 upo
ωn po
k
ω
Tn2π
ωn0.157 T
2π
ω0.04
u t( ) uo cos ωn t upo
ωn
po
k
ω
ωn
1ω
ωn
2
sin ωn t po
k
1
1ω
ωn
2
sin ω t( )
uss t( )po
k
1
1ω
ωn
2
sin ω t( )
0 0.2 0.4 0.62
1
0
1
2
u t( )
uss t( )
t
Amortiguado
ξ 0.05 ωD ωn 1 ξ2
39.95
Cpo
k
1ω
ωn
2
1ω
ωn
2
2
2 ξω
ωn
2
Dpo
k
2 ξω
ωn
1ω
ωn
2
2
2 ξω
ωn
2
A uo DB
upo ξ ωn A C ω
ωD
u t( ) eξ ωn t
A cos ωD t B sin ωD t C sin ω t( ) D cos ω t( ) po
2 k ξ10
uss t( ) C sin ω t( ) D cos ω t( )
0 0.5 1
2
1
0
1
u t( )
uss t( )
t
1.009 103
1.01 103
F t( )
V t( )
0 t
F
F t( ) po sin ω t( )
V t( ) k u t( )
ωn po
k
0.8
1.5 2
10