Reconstruction of Sailing Ship 'Alexander von Humboldt II', Germany

Customer Project

Structural Engineering Strength Design
Marine Engineering Wollert GmbH
Arnis, Germany
Tel: +49(0)4642 92259-0
Construction Engineering Office
HB Hunte Engineering GmbH
Oldenburg, Germany
Designer Marigraph GmbH
Bremen, Germany
Investor Deutsche Stiftung Sail Training

Length: ~ 65 m | Width: ~ 19 m | Height: ~ 42 m
Nonlinear Effects: cable members
Number of Nodes: 6,480 | Members: 360 | Materials: 5 | Cross-Sections: 117

In October 2011, the sailing ship 'Alexander von Humboldt II' began its service and has been conquering the seas ever since. The ship operated by German Sail Training Foundation (DSST) is a barque rigged with three masts. The masts and the hull consist of steel.

It is the first reconstruction of a German tall ship after the construction of the 'Gorch Fock', the training ship of the German Navy.

On the board of 'Alex II', passengers can enjoy a one‑day trip or a cruise for several days, or learn on special training tours how to sail.

The German company HB Hunte Engineering GmbH was responsible for the construction of the new ship. The German company Marine Engineering Wollert GmbH calculated the rigging (masts as well as ropes fixing the masts) and the strength of the hull. Both companies have been customers of Dlubal Software for many years, using RFEM for their structural calculations.

Structural Analysis

In addition to typical finite element calculations of highly stressed systems such as mooring, anchor and davit units, the rigging forces were analyzed in detail. A comprehensive matrix of calculation load cases was created with a multitude of sail-plans for the different wind velocities and directions.

The nonlinear FE calculations were compared with the formula-based guidelines for design and layout given by Germanischer Lloyd. In this way, a coherent safety concept for the masts and spars as well as their rigging by shrouds and stays was reached.

Especially the application of wind forces required a complex knowledge of the theoretical and practical backgrounds of traditional sailing ships‘, says Jürgen Wollert from Marine Engineering Wollert GmbH.

Program Used for Structural Analysis

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