AVEVA World Magazine

AVEVA World Magazine 2014 #1

AVEVA World Magazine | Technology insights and customer successes with AVEVA software

Issue link: http://aveva.uberflip.com/i/248956

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Page 21 of 47

An Ice-breaking Innovation: Arctech builds Baltika How AVEVA Marine has helped to create the world's first oblique icebreaker Helsinki shipbuilders have built 60% of the world's icebreakers currently in operation. Three years ago Arctech, one of the most innovative of this community of specialists, took the far-sighted decision to focus purely on icebreaking technology at a time when other shipyards were diversifying. It was a strategic decision, recognising that growth in Arctic oil & gas production would create increased demand for high-tech, multi-purpose vessels to open up these remote locations. AVEVA met Tapani Skarp, Vice President of Arctech, in charge of design and project design, in his Helsinki office to learn more about this shipyard's big vision, how AVEVA technology is helping to make it a reality, and Arctech's latest innovation – the oblique ice-breaker. The oblique icebreaker The concept of the oblique icebreaker addresses the problem of opening wide channels in shallow passages. For a large tanker, the 25m channel created by a conventional icebreaker is too narrow, so the tanker must be accompanied by two icebreakers, increasing cost. The vessel features a patented oblique design with asymmetric hull and three azimuthing propellers, which allow the vessel to operate efficiently ahead, astern and obliquely. Crucially, as the oblique icebreaker can break ice sideways, it clears a channel almost as wide as its length. Baltika, the world's first oblique icebreaker, has a length of over 76m and will be delivered by Arctech in 2014. 'The history of the oblique icebreaker is actually very long,' explained Skarp. 'Its design went through many stages of evolution until the innovative idea was ordered by a client. The original design was more triangular in shape. Gradually, the design shifted towards a more conventional shape because it was found that a more limited asymmetry was not only best for overall performance, but would also be more readily accepted by the market.' Skarp went on to describe how first model tests on the highly asymmetric design had revealed excessive pitching in high seas, resulting in slamming and air leaks in the forward propeller. The design evolution that led to Baltika has solved this problem while retaining the original benefits of an asymmetric hull. (continues) AVEVA World Magazine 2014 | Issue 1

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