To main content

OMAE2017-61779 Effect of the Beam Element Geometric Formulation on the Wind Turbine Performance and Structural Dynamics

Abstract

In this paper, the original double symmetric cross section beam formulation in RIFLEX used to model the blades is compared against a newly implemented generalised beam formulation, allowing for eccentric mass, shear and elastic centres. The generalised beam formulation is first evaluated against an equivalent ABAQUS beam model (Using the generalised beam formulation implemented in ABAQUS) which consists of DTU 10MW RWT (reference wind turbine) blade in static conditions. A static displacement is applied to the tip, which is close to an operating load. The results appear very similar and ensure that the implementation is correct.

The extended beam formulation is afterwards used on the Land-based 10MW turbine from DTU with external controller. This case study aims at evaluating the effect of the newly implemented formulation on realistic, flexible structure. During the study, the blades were discretised using both the old and new formulation, and dynamic simulations were performed. The effect of the beam formulation was evaluated using several wind conditions that are thought to be characteristic of operating conditions. Results show slight difference between two formulations but could be more significant for next generation flexible blades.

Category

Academic chapter/article/Conference paper

Language

English

Author(s)

Affiliation

  • SINTEF Ocean / Energi og transport

Year

2017

Publisher

The American Society of Mechanical Engineers (ASME)

Book

ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 10: Ocean Renewable Energy

Issue

10

ISBN

978-0-7918-5778-6

View this publication at Cristin