WODCON XX: Solution for Vibration Challenges on Cutter Suction Dredgers

Van Oord’s powerful cutter suction dredger Athena was built by IHC Dredgers for dredging in hard soil.

The strong vibrations on this type of dredger are notorious for their negative effects on the working and living conditions on board. Van Oord’s global dredging experience, IHC’s drive to build innovative dredgers and Loggers’ know-how of shock, vibration and noise control were combined in the development of an innovative solution, that puts an end to this problem most major dredging contractors are facing.

A fully automated system continuously monitors and controls air springs providing horizontal and vertical stabilization of the deck house during operation. As traditional vibration mounts only isolate vibrations from 9 Hz, the Athena required an advanced solution isolating also the low frequencies the crew is exposed to.

Air springs

The completely new solution isolates vibrations starting at 2 Hz that would otherwise be transferred from the cutter head, through the hull to the crew in the accommodations. It also isolates the shocks induced when the cutter head sets its teeth into a newly encountered piece of rock. These capabilities make all the difference between shaky and noisy working conditions and a safe and quiet environment on the Athena.

Important factors need to be taken into account when setting a heavy deck house afloat on air. such as safety precautions, forces inflicted on the deck house caused by ship movements and wind. By sharing their experience in dredging projects and valuable input data. Van Oord and IHC enabled Loggers’ engineers to perform accurate simulations of the system under different circumstances.

In practice, not only the crew benefits from the calm as predicted by the simulation, but their employer as well. With the Athena Van Oord complies with strict local laws and regulations while strengthening the company’s image as an employer of choice.

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Dredging Today Staff, June 6, 2013

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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