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Isolators Siemens, Oriantek,

Jonasson says Oriantek’s Christie & Grey, and Noise work led to a unique Control Engineering. DNV solution. “We selected was also present to verify highly fexible and that the solution complied

Perspectives resilient engine mounts with ICES. “The test won and seismic masses in approval and, save for a a three-stage isolation few minor adjustments, scheme and added a the project was a complete fexible coupling between success,” says Jonasson. the engine and the “Members of our team generator,” she says. “By were on hand during placing isolators between installation and were very

Aerial

Recently launched ORV , was designed to ensure it the base frame and the impressed by the care the fulflled underwater noise requirements.

blocks, and the blocks yard had taken on the and the foundation, our says the company applied is not only unique, but foundation,” she says. calculations indicated that its proprietary design represents a big step “This was one critical part we could reduce vibration software to calculate forward in structural noise of the project we did not levels signifcantly, the natural frequencies control.” The calculations control, but they did a especially between the and response to seaway were then completed and fantastic job.” rotor and stator.” The motion of fve different verifed by the shipyard.

design also included masses (the diesel engine, After more than a year, Working together the addition of an extra the alternator/base frame, the team assembled at Launched in 2012, the mass of 15 tons below the and three cast iron blocks) Pon Power Scandinavia’s ORV Aerial completed fexible skid to further to properly design the facility in Esbjerg, sea trails and is now in reduce vibration to the resilient mounting system. Denmark for the Factory active service. DNV’s hull. “We had worked on Acceptance Test (FAT). Abrahamsen, who Pon Power turned three-stage systems in the Other participants followed the development to Christie & Grey, a past, but never one that included a large process from beginning leading manufacturer of accounted for so many delegation from Taiwan, to end, says that demand precision anti-vibration masses and frequencies,” including government for innovative technical and isolation mounts. he says. “I’ve worked in offcials and shipyard solutions to manage

Patrick Bergin, lead this feld for many years personnel, and noise and vibration engineer on the project, and believe this system representatives from will continue to rise. “Increasingly, noise and

For the ORV Aerial, Pon Power engineered three CAT 3512C gensets to reduce excitation vibration have been from the diesel engine into the genset using resilient mounts and seismic masses in a three- included in environmental stage isolation scheme. Noise isolation and damping was done at the points indicated.

impact studies for coastal projects. Also

Flexible cooling water

Exhaust bellow energy companies connections with operations at sea have started to apply stricter requirements on ponpower underwater sound for offshore support vessels,” he says. “This project is a good example of how different industry stakeholders can work together to develop innovative solutions that, pending more action from regulators, will have a positive, long-term impact on fragile marine eco-systems all over the

Frame Engine Flexible Flexible Adjustable mounted rails mounts coupling generator base world.”

OE | April 2013 28 oedigital.com oe_analysis_v2.indd 28 4/1/13 4:00 PM