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Competencies Wind energy systems

Based on our many years of experience with the analysis of drive trains of direct drive multi-mega-watt wind turbines, we are familiar with following tasks:

  • Eigenfrequency analysis of the whole system for verification with multi-body simulation results
  • Submodeling of components (tower, hub, rotating and stationary components, rotor blades) for integration in MKS programs (e.g. SIMPACK), generator-airgap stiffness
  • Data conversion of rotor blade data from BLADED / AERODYN / SIMPACK, model creation (as well submodel), modal analysis

Creation of large bearing models (main bearings, pitch bearings, azimuth bearings) for detailed analyzes of the load application to the surrounding components and strength analyzes.

Rotors with vertical axis (Darrieurs)

Rotor conteption and Performance chart calculation

Design software

Method: Multiple Stream Tube (MST)

Possibilities:

  • Consideration of reynolds number-dependent profile polares (RE-number dependency of aerodynamic coeff.
  • Parameterized rotor geometry (e.g., Darrieur, H rotor)
  • Performance chart calculation (power vs. wind speed, torque-speed characteristic for maximum power coefficient)
  • Consideration of vertical wind gradients
  • Load calculation for structure analysis
FE-Modeling and structural analysis

Drive train

FE modeling of the wind energy system, calculation of the Campbell diagram on the basis of a modal analysis, investigation of load scenarios and stress determination

Rotor with horizontal axis

Performance chart calculation

Design software

Method: Leaf element method (BEM)

Possibilities:

  • Performance chart calculation (power vs. wind speed, torque-speed characteristic for maximum power coefficient)
Generator Plugin ABAQUS

Example: Generator

Modeling the forces in the air gap in the radial and tangential direction. Specifications of spring characteristics or additional radial circumferential load distributions possible.

Drive train modeling

Example: drive train

Modeling of a drive train with rotating and stationary components as well as rolling bearing models to take into account the load transfer in the surrounding components.

Structural analysis

Example: bearing sourrounding drive train components

Analysis of the drive train with rotating and stationary components as well as rolling bearing model to take into account the load transfer into the surrounding components.

Rotor blade

Example: Eigenfrequency analysis

We convert BLADED or AERODYN data into structural models (beam elements) to compute in the FE-program or to create submodels for multi-body simulation programs (MKS, e.g. SIMPACK).

For this we have a fast configurable tool for data conversion. This allows further time savings in the modeling and development process.