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ClassNK releases CSR software

Classification society ClassNK has announced the release of a new version of its PrimeShip-HULL (HCSR) ship design support software that is compliant with the new IACS Common Structural Rules (harmonised CSR) for oil tankers and bulk carriers.

It says that the software is the first in the world to fully support the new Common Structural Rules, which were adopted by IACS in December 2013. It is providing the software free of charge to its customers, such as shipyards and designers.

The new IACS CSR unify the technical requirements for tankers and bulk carriers, but also incorporate new requirements for structural analysis at the design stage, as well as new formulae for buckling, fatigue, and residual strength criteria.

The new rules will be applied to all bulk carriers over 90m and all oil tankers over 150m contracted on and after 1 July 2015.

“While the new rules will mean safer ships, shipyards and designers will have to invest new resources to meet new design criteria and bring their designs into compliance with the new rules,” said Takuya Yoneya, ClassNK executive vice president and head of development for PrimeShip-HULL (HCSR).

“With PrimeShip-HULL (HCSR), our goal has been to develop a comprehensive and powerful design support tool that rationalises the design process and greatly reduces the man-hours needed to create ship designs that are compliant with the new rules.”

The result of more than four years of development work, PrimeShip-HULL (HCSR) builds on the core of ClassNK’s existing PrimeShip-HULL-CSR software, combining rule calculation, and FE Model-based direct strength calculation with new systems designed to interface directly with commercial CAD and rule calculation software, as well as automate parts of the basic design process.

“Thanks to the new interface with commercial CAD, PrimeShip-HULL (HCSR) makes it possible to automatically generate FE models for the fore, mid, and aft sections of the ship, as well as very fine mesh and buckling panel data. This makes it possible to greatly reduce the time required for some of the most man-hour intensive parts of ship design work,” said Dr Yoneya.

In addition to the improved interface, PrimeShip-HULL (HCSR) also includes a number of features to support both initial and full ship design.

“We have timely released preliminary versions of PrimeShip-HULL (HCSR) to coincide with the first and second drafts of the harmonised CSR in July 2012 and April 2013, respectively, and since that initial release more than 70 shipyards and ship design firms throughout Asia have tested the software and provided design feedback,” said Dr Yoneya.

“Thanks to this extensive testing, we’re confident that the new software will make it easier for shipyards and designers to incorporate the harmonised CSR requirements in their ship designs, and cost-effectively design a new generation of safer and more robust ships.”

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