CESVA SC310, Руководство пользователя

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SC310
User’s Manual
147
T t
t
=
=
∞
⎥
⎥
⎦
⎤
⎢
⎢
⎣
⎡
⎟
⎠
⎞
⎜
⎝
⎛
∫
⋅ =
0
2
1
t
-
)/ - (t - 2
Wm
d e ) ( a
1
max MTVV
ζ ζ
τ
τ ζ
a
Wm
(
ξ
): instantaneous acceleration based on the time
ξ
and with frequency
weighting W
m
, in m/s
2
T: duration of the measurement (evaluation)
τ
: 1 s
10.12.6 Vibration Dose Value
VDV VDV: Vibration Dose Value. Fourth power root of the integral of the fourth power
of the W
m
weighted instantaneous acceleration. With the evaluation time T.
Expressed in m/s
1,75
.
4
1
T
0
4
Wm
)d ( a VDV
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
=
∫
ζ ς
a
Wm
(
ξ
): instantaneous acceleration based on the time
ξ
and with frequency
weighting W
m
, in m/s
2
T: duration of the measurement (evaluation)
10.12.7 Multiplying factor K
K Multiplying factor of the combined curves of the vibration evaluation according
to the old ISO 2631-2.