Table 15-2
External couples
M
Z
[kNm]
M
Y
[kNm]
Freq.
[Hz]
M
Z
[kNm]
M
Y
[kNm]
Freq.
[Hz]
M
Z
[kNm]
M
Y
[kNm]
Freq.
[Hz]
Speed
[RPM]
Engine
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
720
750
8V31
0,2
0,2
---
---
48
50
---
---
---
---
24
25
38
41
38
41
12
12,5
720
750
10V31
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
720
750
12V31
3
4
1
1
48
50
20
21
35
38
24
25
22
24
22
24
12
12,5
720
750
14V31
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
720
750
16V31
15.2
Torque variations
Table 15-3
Torque variations
M
x
[kNm]
Freq.
[Hz]
M
x
[kNm]
Freq.
[Hz]
M
x
[kNm]
Freq.
[Hz]
M
x
[kNm]
Freq.
[Hz]
Speed
[RPM]
Engine
--
--
--
--
31
31
72
75
14
14
48
50
25
19
24
25
720
750
8V31
21
21
90
94
41
41
60
63
82
82
30
31
25
27
24
25
720
750
10V31
1
1
144
150
8
8
108
112,5
47
47
72
75
24,46
23
36
37,5
720
750
12V31
1
1
168
175
1
1
126
131
38
38
84
88
8
8
42
44
720
750
14V31
1
1
192
200
1
1
144
150
24
24
96
100
28
28
48
50
720
750
16V31
15.3
Mass moments of inertia
The mass-moments of inertia of the main engines (including flywheel) are typically as follows:
J (kg m
2
)
Engine
J (kg m
2
)
Engine
890 – 990
980 – 1080
14V31
16V31
640 – 740
720 – 820
800 – 900
8V31
10V31
12V31
15.4
Air borne noise
The airborne noise of an engine is measured as sound power level based on ISO 9614-2. The
results represent typical engine A-weighted sound power levels at engine full load and nominal
speed.
15-2
Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide
15. Vibration and Noise
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