.1.
;
;
;
();
.
.2.
;
.
.3.
1.
1.1.
R(t) + S(t) J(t) = 0
2 k =β/ m; ω2 = r11/ m
.
S(t)= 0
2 k= 0
.
a 2 a
T = 2π/ω
.
,
a 0= v 0/ω1
ψ = 2 kT
, | ||||
< 1 | 0,314 | 0,251 | 0,188 | 0,063 |
≥ 1 | 0,628 | 0,503 | 0,314 | 0,157 |
ω1 ≈ ω
T = 2π/ω1
.
1. ω, T, n, f
EI = 3150 ͷ2, m =0,25 .
2. ω T,
EI = 16200 ͷ2, m =3 .
3. ω
r 11 Z 1+ r 1 F =0
1.2.
R + S − J −F sinθ t= 0
.
t = 0
, ..
y = μ Δ1F.
M = μ MF;
Q = μ QF;
N = μ NF;
σ = μ σF ..
ω1 ≈ ω
θ= ω
.
(θ/ω)2 = 1 γ2/2π2
k= 0
.
4.
m = 3,5 . n = 500 / .
m 1 = 0,146 , e = 0,0228 .
: 245 (Ry = 245 ),
. 30
(Iz = 7080 4, Wz = 472 3)
EI = 2,06108708010-8 = 14585 ͷ2
5. M M :
G = 40 ;
F (t) = 24sinθ t ;
n θ = 90 /;
EI = 2400 ͷ2
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