SIMPACK

Simpack Rotorblade Generator enables users to easily create basic and advanced flexible rotorblades. Basic rotorblades consider flapwise and edgewise bending only, as opposed to advanced which include full torsion bend coupling. The rotorblades are created as beam models using either Euler-Bernoulli or Timoshenko Beam Elements. Geometric stiffening terms can be enabled in the equations of motion to account for the stiffening of the rotorblades with increased rotational speeds. Standard rotorblade data is entered using ASCII text files.

Simpack Interface to AeroDyn, an aerodynamics software library from NREL (National Renewable Energy Laboratory), is used for coupling aerodynamic forces to Simpack horizontal wind turbine models. AeroDyn includes blade element momentum theory, dynamic stall theory, and an optional dynamic inflow theory.

HydroDyn, a hydrodynamics software library from NREL (National Renewable Energy Laboratory), is used for applying wave loads on fixed and floating offshore structures. HydroDyn includes loads from linear hydrodynamics (hydrostatic, waves/currents, added mass, radiation/diffraction) and the Morison equation.