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驗船師業務討論區

anti-vibration solutions of Korean's design

eMule
2012-05-02 18:56 #
As the fuel consumption efficiency of a ship is becoming a primary concern for shipowners, the length of the hull and the operating speed of the main engine decrease while the breadth increases.

The height of the deckhouse is also increased to provide navigation visibility for large container carriers.

Moreover, reinforced vibration regulations come into effect in accordance with shipowners』 demand for comfortable cabins. Such changes make the existing anti-vibration solutions ineffective and thus a new low vibration design and vibration control scheme are necessary.

Hyundai Maritime Research Institute (HMRI) has developed various technologies satisfying lower vibration limit (3 mm/s) including low-vibration deckhouse design, the exact evaluation of major excitation forces, and the development of vibration control devices.

Elaborate parametric study was carried out to determine the optimal shape of the deckhouse in order to reduce vibrations. Different dimensions for the deckhouse were used according to various main engines.

In addition, the wall lay-ups and supporting structures were modified to control the rigidity of the deckhouse.

Such design changes were applied to entire vessels such as VLCC, VLOC, VLOO, bulk carrier and containerships. It was found that the vibration level decreased drastically compared to that of the existing deckhouse design.

From the study conducted by HMRI, low-vibration design and countermeasures for newly developed ships were constructed systematically. Owing to this study, Hyundai Heavy Industries has acquired core technologies to guarantee the vibration level of ship』s deckhouse below the lower vibration limit of 3 mm/s.


Published : May 2, 2012