The new rule requirements, both for Oil tankers and Bulk carriers, introduce a radical shift towards more computerisation of the rule formulations and structural assessment.

Hence, good software support is critical for any Class to provide timely and rational support to ship-owners as well as designers and shipbuilders. As a response to this, Nauticus Hull - the leading class software is completely re-engineered to support the new Rules. In January 2006, DNV was the first Classification Society to launch complete software support for CSR for Oil tankers. During April 2006, DNV again make a new release of its Nauticus Hull software available to the industry, this time with an even wider coverage of the latest Rules updates and clarifications.

Nauticus Hull is a powerful software package for the design and strength assessment of ship structures. It provides a highly efficient environment for ship design, with capabilities ranging from simplified rule-check and scantling calculations to advanced tools for extended calculation procedures, including wave load and finite element structural analysis.

Figure 1 Cargo tanks FE model for strength assessment in Nauticus Hull

The software has been developed in close cooperation with major shipyards in Korea and Japan to ensure it supports the design process in a most efficient way. Therefore, the software has been developed not only focusing on cutting modeling and input time, but rather cutting the total design and approval time. Especially, new tools have been developed to make FE analysis more efficient through automated post-processing and code-checking, as well as generation of loads, net scantlings and boundary conditions. Also, a standardised report format has been developed to ensure easy comparison between Prescriptive Rules and direct strength assessment by FEA.

Figure 2 Local fine mesh model of bracket toe for detailed stress assessment in Nauticus Hull

For more information regarding how Nauticus Hull supports the CSR for Oil tankers, please download this presentation: download