Customers saw a full demonstration of the Torsional Vibration tool at the seminar 'Torsional Vibration and Shaft Alignment Techincal Forum' in Hamburg last November.
From right, Alex Aarvik and Jo Øvstaas from DNV Software hosting the conference with the 26 participants from the following companies: Reintjes; HDW; Technoflex; Wärtsilä Switzerland; Geisliger Gmbh; ThyssenKrupp Marine Systems; Centa; Scania CV AB; Man Diesel AS; Caterpillar Motoren; Desch Antriebe; Aker MTW; Vulkan; Machine Support B.V.; Schottel ;Voith Turbo and SKF.
The new Windows-based Torsional Vibration tool includes capabilities for direct coupled systems, geared/branched systems and generator sets. A full demonstration was performed, showing the typical marine propulsion systems such as electric- and diesel-powered propulsion systems as well as geared propulsion systems.
Control of vibration levels in propulsion systems and generator sets is essential to have machinery that operates safely and reliably. The wrong combination of individually satisfactory components may lead to an inappropriate system. Identifying the interaction between components is an essential part of the system and fnctionality assessment.
Different topics related to torsionalvi brations were addressed. The various damage cases DNV has been involved in were discussed, together with a presentation on advanced shafting design based on a paper published earlier this year at SNAME (Society of Naval Architects and Marine Engineers).
The last part of the seminar presented shaft alignment in the maritime industry. The topic was especially important due to the high number of alignment-related damages occurring, and how it is possible to solve complicated issues with knowledge and a good software tool. DNV has carried out considerable research on the effect of flexible hulls and propeller loads, to bridge the gap between shaft alignment theory and reality.
Control of vibration levels and optimum shaft alignment are necessary on all ships, to have machinery that operates with the required safety and reliability. The shaft alignment tool can be used in the early design stage or in the operating stage to investigate possible damages due to wrong alignment.
The program has several useful features making it possible to find the exact bearing positions, based on traditional
verification methods such as jacking or strain gauge measurements.
| Nauticus Machinery |
The Nauticus Machinery package is a set of calculation tools intended for strength assessment of rotating machinery components and systems. The software package is divided into direct coupled systems, geared systems and generator sets. Most of the calculation tools in the package can be used for design and troubleshooting purpose, while others are Rule-based. Nauticus Machinery is a marketdriven modular system enabling users to configure the package based upon their needs. Some manufacturers are involved in all the components in a propulsion system, i.e. propeller, shafting, gears, couplings, dampers and engines, while others are specialising on single components. |