H H
, .
, .
, p p p p . .
p - , p , p .
. p , .
, c t
x = A sin(ω0 t +a0 )
x = A os(ω0 t + a), (1.1)
.
(1.1) x - p; A - ( ); (ω0 t +a) - t; a, a0 - t = 0; ω0 - . p , : a = a0 - p / 2. p p ( p, pp, p/2), p.
p p p p , pp p, . . F = - k x, k - pp ( ).
- 1 ≤ os(ω0 t +a) ≤ 1 - 1 ≤ sin(ω0 t +a0) ≤ 1, - + .
p n, p - p T. p p :
T = 2p / ω0. (1.2)
p pp p,
n = 1/ T, ω0 = 2pn. (1.3)
p p (). 1 - , p p p , 1 = 1 c -1.
2p , -1.
(. 1.1).
, , 2 π , .. 2π . x = sin(t) , . 1.1, Ox, /8, π/4 . , : α0 = π/4 .
(. 1.1, ) , x = cos(t) t = 0. , Ox: T /8, π/4 . , : α = - π/4 . . (. 1.1, ) π , .. x = sin(t) t = 0 . , π/2 .
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, , ( ) π .