. mi υ i = ω Ri, Ri − .
= | 1 m υ 2 | = | 1 m ω2 R 2. | (4.9.1) | ||
i | 2 i i | 2 ii |
- , . .
n | n | 1 | = | 1 | n | (4.9.2) | |||||
=∑ i =∑ | mi ω | Ri | ω | ∑ mi Ri. | |||||||
i =1 | i =1 | i =1 |
n
∑ mi Ri 2 = I − -
i =1
, ,
1 | |||
= | 2 I ω. | (4.9.3) |
, -
− - υ0 -
ωr.
, , ,
, . . | ||||||
= | 1 m υ 2 | + | 1 I | ω2. | (4.9.4) | |
c | 2 c |
, ,
: | |
δ A = d . | (4.10.1) |
(4.9.3) -
d = d (1 I z ω2)= | 1 I z 2ω d ω= I ω d ω= I z ω d ω dt. | (4.10.2) | ||||
dt | ||||||
, | d ω | =ε ω dt = d ϕ, | ||||
dt | ||||||
d = Iz εω dt = Mz d ϕ. | (4.10.3) | |||||
, , - | ||||||
δ A = Mz d ϕ, | (4.10.4) | |||||
ϕ t | ||||||
ϕ2 | ||||||
A =∫ | M z d ϕ. | (4.10.4) | ||||
ϕ1 |
7
5.1. .
|
|
5.2. - .
5.3. .
5.4. .
5.5. , .
− ,
. -, , , . : ,
, , , , .
− . − , .
x = A cos(ω t +ϕ0) x = A sin(ω t +ϕ1), | (5.1.1) |
ϕ1 =ϕ0 − π 2.
1) x − , .
2) − , - .
3) T − , , ,
, , . [ T ] = 1 .
.
4) ν− , -, ( 1 ). -
[ν]= 1 .
ν = | . | (5.1.2) | |||
T |
5) ω − , , 2π . , 1 - 2π , [ω]= −1. -
ω= 2 πν = | 2π | . | (5.1.3) | |
T |
6) ω t +ϕ0− - .
7) ϕ0− - t = 0.