Wartsila 31, Руководство по эксплуатации продукта

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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 Coordinate system
Table 15-1 External forces
F
Z
[kN]
F
Y
[kN]
Freq.
[Hz]
F
Z
[kN]
F
Y
[kN]
Freq.
[Hz]
F
Z
[kN]
F
Y
[kN]
Freq.
[Hz]
Speed
[RPM] Engine
---
--- ---
--- ---
--- 1
1 2
2 48
50 ---
--- ---
--- 24
25 720
750 8V31
---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- 720
750 10V31
---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- 720
750 12V31
---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- 720
750 14V31
---
--- ---
--- ---
--- ---
--- ---
--- ---
--- 2
2 4
5 48
50 720
750 16V31
Wärtsilä 31 Product Guide - a1 - 18 October 2016 15-1
15. Vibration and Noise Wärtsilä 31 Product Guide