With the release of the new version of Nauticus Hull, DNV hull approval engineers, as well as designers and yard engineers, can now enjoy the most efficient design and verification tool for CSR Bulk
The support for Finite Element Analysis (FEA) in particular has been radically improved with an enhanced version of GeniE and a new automatic code check. The overall goal of this Nauticus Hull upgrade has been to shorten the design loop, making the design process faster and with a higher degree of transparency and quality. With this new version of Nauticus Hull for CSR Bulk, DNV Software hopes to strengthen its reputation as a pioneering leader in the market for strength assessment of marine structures in general and ships in particular.
The latest round of improvements and new features of Nauticus Hull include:
An improved graphical representation of the entire vessel with compartments and cross sections
A completely new, efficient and flexible compartment modeller
An improved and highly flexible load definition module integrated with the compartment modeller
A new cross-section analysis and post-processing module for handling multiple Section Scantling analyses
An automatic code check for the yield and buckling of plated structures in FEA module GeniE
The import of relative deflections from FEA results into fatigue strength calculations of longitudinals at transverse bulkheads.
Design loop tightens
Key customers worldwide have given feedback and suggestions throughout the software development process. “Based on the feedback from many existing users of Nauticus Hull, we have had a strong focus in this new release on making it simpler to make design iterations,” says Torbjørn Lindemark, Nauticus Product Manager at DNV Software. “This, in turn, will give a shorter design lead time.”
Nauticus Hull is the only programme on the market to offer concept modelling, which enables designers to build in more design logic into a core model of the ship. This is used later for many different analyses in addition to post-processing and rule checks. One benefit of this approach is that only one model needs to be updated to effect changes in all subsequent analyses, processing and rule checks for the ship design. Capacity models needed to perform yield or buckling checks can be generated for the whole vessel or for selected areas. “It’s a huge timesaver,” says Lindemark.
The new reporting and documentation functions in the FEA module GeniE are in a class of their own, and are expected to greatly improve the transparency of the design as well as ease verification and thereby improve quality. The new automatic code check for the yield and
buckling of plated structures strengthens GeniE’s position as the preferred structural analysis tool for bulk carrier design. Features include checks against allowable stress levels and buckling according to
the Common Structural Rules for bulk carriers. Along with the plate code check, the report generator has also been extended to include standard templates tailored according to the CSR Bulk requirements.
Faster
In Nauticus Hull, cross sections and compartments are visualised in a graphical model of the vessel. In addition to providing immediate feedback on data input, the graphical presentation enables a quick overview of the current status of the modelling and rule check analysis.
The new compartment modeller is designed to facilitate efficient modelling and the entry of compartment data and loads. Section Scantlings is used as a basis for defining cross sections and transverse bulkheads. It provides a powerful tool for the fast generation of compartments in the cargo area.
In GeniE, it is now possible to run code checking of both plated and frame type structures. The buckling capacity model is automatically generated with net scantlings and panel geometry in agreement with the detailed rule requirements mandated by CSR Bulk, including complex non-rectangular plate
panels.
The code check results can be viewed graphically or in table format. Detailed results for each panel with intermediate results are available. Panel settings can be altered, and subsequent redesigns are easily done. Several panel settings can be altered for each run, such as the settings for the Correction Factor, Panel Net Thickness, Panel Length/Breadth and the Rotation boundary for Panel Buckling.
The GeniE report generator comes with templates that easily generate reports for viewing in text format, HTML format or spreadsheets or formatted reports. Customisable filters limit the amount of data reported. Report settings can be saved, making it easy to recreate the same report in another code checking run.
contact information: thorbjørn.lindmark@dnv.com