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Engineering design and analysis references

Stress analysis of a pipeline in a pump station of an asphalt carrier
pipelines as2con has conducted stress analysis of a pipeline in a pump station of an asphalt carrier in 3. MAJ shipyard. Analysis has been done using Finite Element Method (FEM). Stresses within the pipe walls appear as a result of external loads caused by thermal expansion of the pipeline as well as the vertical displacements of cargo tanks which occur when the ship is in ballast.

 

Structural analyses for 3. MAJ shipyard

 

Slika3-3MAJ-2 as2con has been contracted by 3. MAJ shipyard to perform structural analyses of newbuilding’s NB 716 deck with the mooring equipment installed onboard asphalt carrier for Swedish shipping company Wisby. Analyses have been done using Finite Element Method to check whether the equipment can withstand safe working load following the requirements of the Mooring Equipment Guidelines.

 

 

Crashworthiness of an electric car (2011)
sudar DOK-ING ltd., Croatian developers of the electric car "XD concept", have included as2con in part of their development phase. Currently, we are working on improvements on the front bumper's crashworthiness. Non-linear finite element simulations of car collision are carried out in order to improve the bumper design.

 

Harvester of Sorrow - keeps the sea clean


Harvester_of_Sorrow__tablica

We have developed a concept of the innovative vessel for sea cleaning - Harvester of Sorrow.

The purpose of this modular vessel is cleaning spills and other solid and liquid sea pollution.

 

It is based on the modularity with the detachably rotating drums and floating modular containers.
Crashworthy coastal LNG carrier

LNG__tablica

We develop a conceptual design of the 750t DWTcrashworthy coastal LNG carrier for transportation and distribution of LNG cargo along the Adriatic coast. Gas distribution in ports will be performed through the LNG reception facilities.

 

The vessel is designed with a crashworthy side and bottom hull structure in order to reduce the risk of collision and grounding. In combination with azimuthing propeller, this will allow safe harbour operations without tug assistance.

 
MorphHull - a wind farm service vessel

Morphull__tablica

MorphHull is a wind farm service vessel. It  is operating in two modes: SWATH (used when approaching wind turbine and for transfers equipment and personnel) and mono-hull (used in voyage).

 

The combination of mono-hull and SWATH mode gives the best characteristics of both modes when needed – mono-hull mode for high-speed transit and SWATH-mode for low-motion transfers of personnel and equipment.

 

The measurement of vibrations on a motor yacht (2010)


as2con was employed to measure vibrations on a 40 m luxury long motor yacht. The measurements were performed in engine room, engine room garage, on fly deck and in saloon. A proposal to mitigate excessive levels of vibrations were proposed.

The measurement of vibrations on the river cruiser (2010)

Grand Circle Cruise Lina engaged as2con to perform measurements of vibration and noise on the river cruiser in Egypt in the beginning of July 2010. We found ways to reduce vibrations and noise on the cruise under the condistions of navigation and in terms of berth.

Strenght analysis of a luxurious 62m long yacht (2009)

Lifting analysis and design of supporting structure.

strenght

Design of an all-steel laser-welded sandwich panel deckhouse

deckhouse_009 as2con has been contracted by IHC Merwede to perform full support in development of the innovative design of a dredger funnel deckhouse. The speciality of this design is the application of all-steel laser-welded steel sandwich panels. Design and engineering feature: parametric 3D FEM model for optimization of panel scantlings, detailed stress assessment of all joints and their design, design for production, support in assembly and installation.

Vibration assessment of a gen-set and mitigation of high-level vibrations (2009)
Losinjska plovidba Ltd. contracted AS2CON to assess vibration of auxiliary engine and generator set. The FE model was generated using FEMAP computer program. Model includes foundations of engine and generator set (big asymmetrical T-bars, tubes, brackets), engine with all important parts (pistons, crankshaft) and generator. Improvements are suggested to owner of the ship for consideration and feasibility check.
 Losinjska

Forced vibration and noise analysis of an asphalt carrier (2008-2009)
Lo04 Forced vibration and noise analysis utilizing Finite/Boundary Element Method for a 108 m long asphalt carrier with recommendations for improvement of these characteristics to meet the IMO requirements. The study is contracted for KRALJEVICA SHIPYARD, Croatia.

Forced vibration and noise analysis of a container-passenger ferry (2008-2009)
Forced vibration and noise analysis Finite/Boundary Element Method for a 90 m long container-passenger ferry, with recommendations for improvement of these characteristics to meet the Comfort Class requirements.The study is contracted for DELTAMARIN GROUP Oy, Finland.

DM-Bella

Conceptual design of a luxurious motor yacht (2007-2008)

motor_yacht 24 m, 30 kn + composite motor yacht with fly bridge and luxurious interior.

Forced vibration analysis of a car-passenger ferry (2007)
Forced vibration analysis of a double-ended car-passenger ferry with recommendations for improvement. The study was conducted for a shipyard KRALJEVICA in Croatia within a period of 2 months. The full-ship model was built within 15 days to the detail of a stiffener. The detail and global response analysis are conducted concurrently.
 Kra0

Rolled steel sandwich panel roof analysis (2007)
panel_roof New type of lightweight steel sandwich panel, produced via a patented rolling technology by SHIPPAX Oy, is applied for roofing of industrial hall. Three versions of a roof are considered, two cylindrical and one flat roof concept. The roof is analysed under uniform pressure load, simulating snow load, up to the point of total collapse. Ultimate load is identified for all the three versions.

Laser-welded Z-core steel sandwich panel roof analysis (2007)
Elastic analysis of the laser-welded steel sandwich panel produced by KENNOTECH Oy with Z-Core, including fire insulation cut-outs, and foam core filling with finite element method. The analysis evaluates the overall deflection and stresses of the sandwich panel under loading and investigates the influence of different foam properties on the response.
 Z-core_steel

Steel reinforced concrete I-beam mould analysis (2007)
I-beam Linear elastic analysis of the steel mould structure produced by RIMERA Oy is performed with the finite element method. The Analysis evaluates the overall deflection of the mould under loading of the wet concrete, and investigates the influence of different connections, joints, and most important of the clamping system applied in the mould.

Grounding of laser-welded sandwich panels (2006)

Analysis of the behaviour of laser-welded steel sandwich panels with web-core, or I-core under impact loadings. This study is conducted with the purpose to investigate the possibility of using such panels as outer shells of ships. Preliminary results show that with proper design it is possible to reach and in some case surpass the equivalence of conventionnally stiffened panels.
 laser_welded_2006

Laser-welded steel sandwich staircase module for cruise ships (2005)

Laser-welded_2005 The aim of this study was to design and study the applicability of laser-welded steel sandwich panels as the staircase module within a cruise-ship. This concept allows for the complete prefabrication of such a module that can eventually increase the efficiency of the ship production and reduce the building time. The module was considered as the integrated part of the ship structure carrying all the global loads. Therefore, the actual loads have been obtained from the modified global finite element model for an existing ship where the existing finite elements have been modified accordinagly to represent the installed sandwich staircase module. Additionally to the assessed strength, as2con evaluated the fatigue life for the critical joints, including the module's corners, the panel and the deck connections.

 

Comparative study of corrugated sandwich panels (2005)

A parametric study was performed so to evaluate the benefits from non continuous corrugation over continuous corrugation of laser-welded steel sandwich panels. The benefits between the panels have been evaluated in terms of weight savings at approximately equal strength properties. The study also involved the basic test planning.

 corrugated

 

Design and analysis of steel sandwich flooring for a large sports hall: ESPORT ARENA (2004 - 2005)

esport_arena The Esport Arena for various sport events was opened in spring 2006. The Arena has two levels containing separate sport fields. The challenge was to design a structure of a large span, free of supporting pillars, for the middle floor. Laser-welded steel sandwich panels were then choosen as the ideal solution for this problem. The performed analysis included the different loading conditions on the panel, including eigen-frequency for prevention of resonances during events. Finally, as the floor built of sandwich panels was covered with concrete slabs as2con modelled the steel-concrete interaction.

 

 

Fire resistance of steel sandwich panels (2003 - 2004)
Investigation of fire resistance properties of a corrugated laser-welded sandwich panel in order to determine the lowest acceptable thickness of insulation material needed to improve the fire resistance properties of the panel. Two different insulation materials were considered: Tarec Ecophen40 and Rockwool90.
 Fire_resistance