On the importance of the beam reference line

Abstract

The development of a new beam reference line to improve bend-twist response modelling is presented. The beam reference line is derived as the locus of the cross-section elastic energy centres under pure bending moment. The performance of the new reference line is assessed via experimental measurements performed on a Siemens Gamesa wind turbine blade. Bend-twist modelling capability is assessed by comparing the location of the zero-twist rotation line and zero-twist-rate lines.