bravo zulu 1/2008 - GL Group

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SUBmERSIBlES deep-diving Record at lake Baikal With the two manned submersibles mIR 1 and mIR 2, a new benchmark in freshwater deep diving has been reached. germanischer lloyd played a crucial part in the success of this record lake Baikal’s volume, at 23,600 km3 , is greater than any other fresh water lake and makes up approximately 20 per cent of the world’s surface fresh water. As a point of comparison, if you were to drain Lake Baikal, it would take the Great Lakes of North America: Superior, Michigan, Huron, Erie, and Ontario to refill the empty basin. In August 2008, Baikal was definitely not empty. A new benchmark in freshwater deep diving has been reached. The two manned submersibles MIR 1 and MIR 2 have touched the bottom of Lake Baikal. The new record for deep-diving in freshwater is now at 1,580 metres. Germanischer Lloyd played a crucial part in the success of this record. The expedition to the depths of Lake Baikal 6 coopERaTIon. georgios Spiliotis, gl area manager australia (l.), and chris Eggleton, anZac Spo director, signing the contract. bravo zulu 01/2008 pREpaRaTIon. The mIR in transport position. was led by scientist Artur Chilingarov, corresponding member of the Russian Academy of Natural Sciences, who previously participated in the Arctic submersible mission at the North Pole in August 2007. Extensive Security checks In the run-up to this dive, extensive calculations and drawing approvals were carried out for the support vessel: a barge carrying the MIRs, a 100-tonnes crane, accommodation for the team and all the supplies needed for the expedition. These results were pre-checked by the Russian Register and verified by Germanischer Lloyd. For the expedition, the submersibles and the equipment were carried from Kaliningrad to Irkutsk by a large cargo plane. The Australian Department of Defence and GL have renewed their cooperation by signing a contract for the maintenance of class of the ANZAC ships. The new contract includes the provision of one additional statutory certificate. The “Safety Equipment Certificate” was issued to the ANZAC ships following a careful analysis of the ships’ safety arrangements in close cooperation with the Naval Flag Authority to establish conformance with the relevant statutory requirements. The eight frigates for the Royal Australian Navy (RAN) were brought under Onsite the MIRs, the crane and the equipment were installed on the barge. The survey was carried out by Harald Pauli and Karsten Hagenah, both Germanischer Lloyd experts for underwater technology. They were responsible for the professional installation of the MIR submarines and the new 100-tonnes crane on the barge. Mainly the bearing strength, deck load, heeling of the barge and mounting of the equipment were of special interest to them. Before the submarine came into operation, extensive security checks and technical tests were carried out to ensure their safe operation during the dives. media attention at Test dives The first dives were undertaken by Harald Pauli together with Dr Anatoly M. Sagalevitch and by Karsten Hagenah with Yevgeny Chernyaev. Both Dr Sagalevitch and Mr Chernyaev are from the Shirshov Institute of Oceanology, Moscow. Different kinds of manoeuvres and diving conditions were executed where the submersibles showed their possible field of application. The test dives where accompanied by more than 60 journalists and TV teams. After completion of the diving tests, the survey statements and the certificate for operating the MIRs in fresh water was handed over to Dr Sagalevitch. “The whole expedition, as well as the survey, was made possible by the outstanding support of the company Metropol and the Province Buryatia,” said Harald Pauli, Head of Pressure and Underwater Technology. “Especially Bator Tsyrenov, Deputy Director of the Representative Office in the Republic of Buryatia, and his brother Bair Tsyrenov, Director of the Baikal Fund, were responsible for the success of the local support.” ■ EXpERT. harald pauli on the way to the first dive. conTRacT REnEWal germanischer lloyd Supports anZac GL class in 2002 for an initial period of six years. During this time, Germanischer Lloyd provided the Navy with assurance of the safety of the ships and their systems, utilizing the then newly-established naval classification regime. “This world’s first achievement, whereby naval combatant ships were granted full class and provided with statutory certificates, is a testimony to GL’s naval experience and the RAN’s foresight in facing the challenges of the navies of today,” said Georgios Spiliotis, GL Area Manager Australia. ■
claSSIFIcaTIon Second naval Submarine in class The second naval submarine has been submitted into GL class. The conventional class 209 submarine of type 1400 MOD for the South African Navy was built by the German Submarine Consortium, consisting of Howaldtswerke Deutsche Werft AG (HDW), Kiel, Nordseewerke GmbH (NSWE), Emden, and MAN Ferrostaal AG, Essen. Delivery took place in November 2006. The submarine “SAS Charlotte Maxeke” has received “100 N 6 Submarine” classification, the machinery plant was classed as “MC U” in June 2008. The sister vessel “SAS ‘Mathatisi” was successfully classed last year cUSTomER SERVIcE network Expanded In order to provide worldwide navies with a single point of contact and enhance onsite customer service, GL appointed Naval Business Development Manager (BDM). They will interact with GL’s local representatives, all other internal and external technical and administrative specialists to carry out naval projects. Headquarters will prepare proposals, run projects and support field sales. The traditional range of services includes comprehensive classification services for newbuildings based on GL design requirements for surface craft and submarines, safety consulting for ships in operation, as well as a wide range of engineering services such as assessment of the strength of pressure hulls against buckling, sufficient fatigue life capacity, resistance against underwater explosions or vibration behaviour. “Much like in commercial shipping, these surveys are an excellent means of identifying wear and tear early on, thus helping to avoid more costly repairs at a later date,” said Lorenz Petersen, Head of Navy Projects. For newbuilding projects, GL’s global network of surveyors handles the full spectrum of construction monitoring services using modern software tools. Following the approval of a newly-built naval vessel, the ship continues to undergo technical inspections at regular intervals while in service. Additionally, GL opened a new office in Berlin. Dietmar Gossel, who is the on-site Liaison Officer, acts as contact person for authorities, institutions as well as governmental agencies and navies in the federal capital. ■ contact details: Dietmar Gossel, Liasion Officer, Phone: +49 30 2092-4168, E-Mail: dietmar.gossel@gl-group.com as the first naval submarine worldwide. The South African Navy had commissioned GL with the classification of a total of three submarines. The order includes the inspection of the construction plans as well as annual technical safety checks. The third vessel will be inspected at the end of 2008. In classifying newly-constructed submarines, Germanischer Lloyd’s services include the inspection of construction drawings, materials, joining, propulsion and systems technology, as well as supervision of construction and testing. GL also tests and certifies fuel cells and other AIP systems. ■ acoUSTIcS noise under control Ships are known to radiate noise in all frequency bands, with the highest sound levels at the lowest frequencies. Reducing the radiated noise level as far as possible, be it on board or outside the ship, is one of the GL Acoustics department’s main tasks. For naval vessels in particular, it is of great advantage to reduce the level of waterborne noise to make the ship more difficult to detect. For very high frequencies (structure-borne noise), the standard FEA approach to vibration analyses is impossible due to excessive computational requirements. For a typical passenger vessel for a frequency of 1,000 Hz, a FEA vibration model would lead to several million degrees of freedom. VIRTUal. gl noiseFEm grid applied on the validation of radiated noise of a mine-hunter. noISE and VIBRaTIon – gl’S SERVIcE If you would like to be informed about noise and vibration analyses, please contact Jürgen Jokat, GL’s Head of Acoustics. Cooperation should start as early as possible, preferably in the conceptual design stage. If desired, standardized parts of the SUBmaRInE EXpERTS (from l. to r.). Burkhard lilienthal (automation), Joachim Zipfel (Electrical Systems), dr lars grünitz (Senior manager naval Services) and matthias Schmidt (Steam Boilers and pressure Equipment). However, the fact that information is required only averaged over a frequency band allows an alternative, far more efficient approach based on statistical energy analysis (SEA). The Noise Finite Element Method (GL NoiseFEM) of Germanischer Lloyd is based on a related approach. GL NoiseFEM predicts the propagation of structure-borne noise energy by analysing the exchange of energy between weakly-coupled subsystems. Validation with full-scale measurements shows that the accuracy of GL NoiseFEM is sufficient for typical structure-borne noise predictions in the frequency range between 80 Hz and 4,000 Hz. Structure-borne noise analyses have been validated on the wetted shell and meet the requirements, which is an important step towards predicting the radiated noise of vessels. GL NoiseFEM structure-borne noise analyses have been already applied since 1997 to support the design of mega yachts, navy and passenger ships. ■ For further information: Jürgen Jokat, Head of Acoustics, Phone: +49 40 36149-9 8, E-Mail: juergen.jokat@ gl-group.com work scope can be conducted by the shipowner, for example, establishing the finite element model or local vibration analysis with GL training and supervision. Noise and vibration measurements such as SAT, HAT, FAT are also offered. bravo zulu 01/2008 7
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