Updated calculation tools from DNV GL

The updates offer designers and yards increased calculation speed and efficiency in design, in relation to the introduction of the IACS Common Structural Rules for Bulk Carriers and Oil Tankers (CSR BC & OT).

“We were one of the first classification societies to integrate support for the common structural rules into our tools,” said Vebjorn J Guttormsen, head of selection calculation tools at DNV GL.

He added: “Since then, our tools have been used successfully in many newbuilding projects by years and designers, especially in Korea, China and Japan, and the new versions build on this experience.”

New IASC CSR has led to more computerisation of rule formulations and structural assessment. The advanced methods give a better picture of how a design will perform in reality.

Changes to the Nauticus Hull and Sesam GeniE address the needs of the designer who will be working with an increased number of models and load cases.

Erik Ian von Hall, head of product centre at DNV GL Software, said: “In order to ensure excellent modelling performance on such large models we have introduced a new database file format for Sesam GeniE.”

“This new file format ensures significantly less CPU time needed on large modelling operations and meshing.”

CSR BC & OT involve working with large FE cargo hold models with a huge number of load cases.

The newly developed FE fatigue tool in Nauticus Hull also includes methods for adjusting the stress components for element sizes differing from the net thickness, allowing mesh consistency while updating plate thicknesses in design iterations.

“Advanced software tools will continue to grow in importance in the future, with the increasing emphasis on making more realistic determinations of loads and structural strength,” added Mr Ian von Hall,

He concluded: “At DNV GL we have a large and dedicated software team and we are committed to ensuring that our tools provide the efficient engineering support our customers need, both today and in the future.”