MARINE DESIGN ASPECTS FOR LARGE MODULES ON HEAVY TRANSPORT VESSELS

摘要

This paper describes the naval architecture and structural design of onshore and offshore modules on self propelled Heavy Transport Vessels. The scheduling of design, fabrication and shipping are discussed. The process of long distance transport of modules has been evolving since the 1970s, when it was used for an onshore project in the UK. This work continues today for large offshore modules being transported from the Far East to the North Sea and for large LNG modules transported to locations in various parts of the world. Heavy Marine Transport is a well accepted method to move large modules around the world. This type of transport is normally limited to getting from and going to sheltered locations, where module loading and discharge operations are safely carried out in very mild environment. However, there is also a demand for loading, at a fabrication yard, and discharge at offshore locations. As these operations are sensitive to environmental conditions, they have consequences for scheduling. Also, with increasing size and weight of offshore structures and the desire to deliver these objects directly to remote offshore location, larger Heavy Transport Vessels are required, which may need to operate in significant sea states during offshore lift off or floatover.