Strength analysis of ship structures by means of FEM requires realistic loads. The most realistic loads will result from CFD simulations. German Lloyd (GL) have specified guidelines for a design verification process by means of FEM-analysis with CFD-based loads based on the equivalent design wave approach. The GL ShipLoad program integrates all algorithms necessary to access and combine the data of the CFD computations and the FEM-model for generating the appropriate CFD-based FEM loads. It also provides a GUI to easily control the above load generation process in a time- and cost-saving manner. This paper describes the technology for coupling CFD and FEM computations and for selecting the appropriate design waves. One core component for linking CFD and FEM is a repository for the ship hydrodynamic results (SHR). Another important component is an algorithm which maps CFD pressures to FEM nodal loads where CFD and FEM meshes need not coincide. Both the exchange file and the mapping algorithm are independent of the CFD method. Therefore, the currently applied efficient strip method can be replaced by more advanced procedures.
Efficient generation of CFD-based loads for the FEM-analysis of ship structures
Effiziente Nutzung von Lasten aus CFD-Berechnungen für die FEM-Analyse von Schiffstrukturen
2007
8 Seiten, 5 Quellen
Aufsatz (Konferenz)
Englisch
3D-Darstellung , Anwenderprogramm , Belastbarkeit , Biegemoment , Datenaustauschformat , Fluid-Struktur-Wechselwirkung , Fracht , graphische Benutzeroberfläche , Hydrodynamik , hydrodynamische Eigenschaft , Knotenpunkt , Last (mechanisch) , mechanische Festigkeit , Methode der finiten Elemente , Navier-Stokes-Gleichung , numerische Strömungssimulation , Schiffbau , Schiffkörper , Schiffsentwurf , Schiffswiderstand , Software für numerische Strömungssimulation , Software-Komponente , Software-Paket , Wasserwelle
Efficient Generation of CFD-Based Loads for the FEM-Analysis of Ship Structures
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