Abstract. Detailed 3D finite element simulations are state of the art for structural analyses of wind turbine rotor blades. It is of utmost importance to validate the underlying modelling methodology in order to obtain reliable results. Validation of the global response can ideally be done by comparing simulations with full scale blade tests. However, there is a lack of test results for which the blade data are completely available. The aim of this paper is to validate one particular blade modelling methodology that is implemented in an in-house model generator, and to provide respective test results to the public. A hybrid 3D shell/solid element model is created including the respective boundary conditions. The problem is solved via a commercially available finite element code. A full scale blade test is performed as the validation reference, for which all relevant data are available. Some data have been measured prior to or after the test in order to account for manufacturing deviations. The tests comprise classical bending tests in flap-wise and lead-lag direction as well as torsion tests. For the validation of the modelling methodology, global blade characteristics from measurements and simulation are compared. These include the overall mass and centre of gravity as well as their distributions along the blade, deflections, strain levels, and natural frequencies and modes. Overall, good agreement is obtained, though some improvements might be required for the response in torsion. As a conclusion, the modelling strategy can be rated as validated.
Validation of a modelling methodology for wind turbine rotor blades based on a full scale blade test
