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Wärtsilä 31 Product Guide
15.
Vibration and Noise
Wärtsilä 31 generating sets comply with vibration levels according to ISO 8528-9. Main engines
comply with vibration levels according to ISO 10816-6 Class 5.
15.1
External forces and couples
Some cylinder configurations produce external forces and couples. These are listed in the
tables below.
The ship designer should avoid natural frequencies of decks, bulkheads and superstructures
close to the excitation frequencies. The double bottom should be stiff enough to avoid
resonances especially with the rolling frequencies.
Fig 15-1
Table 15-1
Engine
8V31
10V31
12V31
14V31
16V31
Wärtsilä 31 Product Guide - a1 - 18 October 2016
Coordinate system
External forces
Speed
Freq.
F
Y
[RPM]
[Hz]
[kN]
720
24
---
750
25
---
720
---
---
750
---
---
720
---
---
750
---
---
720
---
---
750
---
---
720
48
4
750
50
5
Freq.
F
F
F
Z
Y
[Hz]
[kN]
[kN]
[kN]
---
48
2
---
50
2
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
2
---
---
---
2
---
---
---
15. Vibration and Noise
Freq.
F
F
Z
Y
Z
[Hz]
[kN]
[kN]
1
---
---
---
1
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
15-1
- Quick Links:
- Wärtsilä 8V31
- Wärtsilä 16V31
Hide quick links:
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