HYDRAN-XR combines structural finite element analysis and hydrodynamic analysis for the integrated three-dimensional HYDroelastic Response ANalysis of floating and fixed structures. Of course, it will also carry out  hydrodynamic analysis of rigid structures as well purely structural finite element analysis. However, it has been designed from the ‘ground-up’ to analyze the integrated fluid-structure analysis problem, more specifically the wave-induced response (motions, displacements, and structural forces and stresses) of flexible (deformable) structures. The hydrodynamic motion response of a single rigid body and of multiple rigid bodies are treated as subsets of the more general formulation for flexible structures. It can also analyze response of bottom fixed structures to waves and/or earthquake ground motion.

The theory underlying HYDRAN-XR includes:

•     Linear hydroelasticity

     −     Linear structural finite element model     

      −     Linear hydrodynamics based on 3-D linear potential theory

     −     Constant panel formulation of the Green function method

     −     Complete structure-fluid-structure interaction

     −     Infinite or finite water depth

     Linear structural dynamics

     −     ‘Reduced-basis’ (assumed modes) approaches

     −     Linear mooring stiffness

•     Frequency domain solution

     −     Transfer functions for responses in regular waves

     −     Statistical response based on transfer functions and wave spectra

Response quantities that can be obtained include:

     •     Structural displacements at any point

     •     Structural forces and stresses (depends on structural model)

     •     Fluid potential/velocity on the wetted surface

     •     Fluid pressures on the wetted surface

Key capabilities include:

     Double, single, or no structural symmetry options

     Response of multiple flexible and/or rigid bodies

     Detailed control over solution process

     Extensive command language to manipulate response data and scripting

     Scripting language supports if branches and do (for) loops

     Windows, Mac OSX, and Linux versions are available

     Any consistent unit system can be used.