COVER STORY | PORTFOLIO
the ship’s hull on the computer screen – was no longer adequate. “We were convinced that ship designing meth- odology was going to evolve towards simulation-based de- sign,” Claus Abt explains. The draughtsman engineer was going to be replaced by the designer giving shape to the hull through consistent application of numerical methods
purely mathematical strategies.
Thousands of Hull Variants
“At the outset, none of us really believed in this business model,” Abt confesses. “But the outcome has confirmed we made the right decision.” In summer 2007, after four years of work, the founders of Friendship launched an innova- tive simulation application they called “Friendship-Frame- work”. Now shipyards can have their computers generate several thousand variants of a design in a single weekend, depending on system performance. “What sets our method apart is the concept of describing a complex body based on a small number of parameters,” Stefan Harries points out. “While traditional approaches take hundreds of variables to define a ship’s hull, all our method requires is ten to fifteen parameters. The key question is: How many parameters are ultimately commonsensical?”
Friendship-Framework is rooted in the well-estab- lished Computer-Aided Design (CAD) concept every de- signer is familiar with. What is new is the incorporation of Computational Fluid Dynamics (CFD). CFD software is used to compute, for instance, the water resistance and seakeeping properties of ships. The Friendship engineers call the result of this integration “simulation-driven de- sign”. Following its market introduction, the application quickly established itself as the world’s leading numerical design tool for bodies in a flowing environment. Friend- ship-Framework can not only be used to compute ship hulls but also turbo machines of all kinds.
World-leading Design Process
“If you work with the conventional CAD method, chang- ing one point on a ship’s hull will simply cause a dent at that location,” Abt explains. “With Friendship-Frame- work, changing one parameter will cause the entire hull to be adapted based on the overall design concept.” For example, entering a new value for the water angle of inci- dence into the user interface will cause the three-dimen- sional, freely rotating hull image displayed on-screen to take on a more slender contour. Within less than five sec- onds, the computer will produce the new data. The user can tell at a glance what the new, slimmer hull contour will “cost”: The water displacement, and thereby, the car- go capacity, have remained unchanged, while the reduced resistance will lower fuel consumption – and thus lead to higher energy efficiency.
Friendship Systems’ customers are companies such as Thyssen Krupp Marine Systems, Meyer Werft, DSME in Korea, as well as Chinese shipyards and design offices. In August 2007, Friendship Systems presented Friendship- Framework version 1.0. An upgrade to version 2.0 was re-
leased this spring.
For further information: FRIENDSHIP SYSTEMS, Phone: +49 331 967 660, E-Mail: email@example.com
3D IMAGING. The behaviour of the hull in a flowing environment after optimization with the Friendship-framework.
Finding the best parameters for the on-board systems and an optimal ship design are key prerequisites for efficient ship operation. FutureShip, a new Germa- nischer Lloyd subsidiary established re- cently, helps customers get ready to face tomorrow’s challenges
ou don’t have to be a prophet to know which way the wind is blowing. There can be no doubt that ships must become more efficient within the next few years. In the face of tighter environmental restric- tions and rising fuel costs, ship operators have no other choice than to take advantage of whatever means can be found to optimize ship operation, on-board systems and hull designs. Y
To prepare for these challenges, Germanischer Lloyd es- tablished its new subsidiary FutureShip. “FutureShip offers a catalogue of services with a common objective: optimiz- ing ships, both those in operation and those yet to be built,” explains Managing Director Volker Höppner. GL’s FuelSaver programme, including CO2 analysis (ECO Patterns) and op- erational fuel consumption analysis (ECO Practices) services, forms the basis of a range of expert consultation offerings geared towards reducing fuel consumption. To streamline the hydrodynamic properties of ships, Germanischer Lloyd integrated the expertise of its recently-acquired subsidiary Friendship Consulting, Germany, into the FutureShip pool of resources.
FutureShip is a comprehensive, detailed consultancy that scrutinizes all on-board systems of a ship for potential energy savings. “It all begins with the CO2 index analysis,