TY - CONF

T1 - Investigations on fatigue, fracture mechanics and ultimate limit state of a wind turbine rotor blade

T2 - 9th European Workshop on Structural Health Monitoring, EWSHM 2018

AU - Friedmann, H.

AU - Grießmann, T.

AU - Kremling, Stefan

AU - Nuber, A.

AU - Sayer, Florian

PY - 2018

Y1 - 2018

N2 - Rotor Blades (RB) are key components for wind energy generation. They convert the kinetic energy of wind into a usable torque at the turbine and their design of RB directly decides on the performance of a wind turbine. For this reason, no manufacturer discloses all design data being necessary for a complete finite element method (FEM) model. This is the reason why no complete construction documents of RB are available, also not for research purposes. However, within a research project “Multivariate Structural Health Monitoring for Rotor Blades” (MultiMonitor RB) all design data will be available for modelling purposes. During the entire life cycle of a wind turbine, a large number of cyclic dynamic loads act on RB that can lead to material fatigue until failure. Structural Health Monitoring (SHM) systems can ensure the functionality and safety as they continuously measure stresses and strains. Unfortunately, for damage monitoring there are currently no clear limit values. The damage event has to be recorded based on the reduction of the RB stiffness. However, without knowledge of loads and design data there is no information about the ultimate limit state or the remaining lifetime. Within the research project MultiMonitor RB, a consortium consisting of two institutes of the Leibniz University Hannover, two Fraunhofer Institutes and two companies (Wind MW and Woelfel Engineering) will design and manufacture a full-scale rotor blade were all construction documents are available for building a complete FEM model. In addition, hardware and software methods for SHM will be developed. The RB will then be instrumented and tested to investigate the performance of the monitoring system. At the same time, the FEM model of rotor blade and test rig will be verified with test results. Furthermore, methods for calculating fatigue damage of fibre-reinforced plastics and investigations in the fracture mechanics of RB are also considered.

AB - Rotor Blades (RB) are key components for wind energy generation. They convert the kinetic energy of wind into a usable torque at the turbine and their design of RB directly decides on the performance of a wind turbine. For this reason, no manufacturer discloses all design data being necessary for a complete finite element method (FEM) model. This is the reason why no complete construction documents of RB are available, also not for research purposes. However, within a research project “Multivariate Structural Health Monitoring for Rotor Blades” (MultiMonitor RB) all design data will be available for modelling purposes. During the entire life cycle of a wind turbine, a large number of cyclic dynamic loads act on RB that can lead to material fatigue until failure. Structural Health Monitoring (SHM) systems can ensure the functionality and safety as they continuously measure stresses and strains. Unfortunately, for damage monitoring there are currently no clear limit values. The damage event has to be recorded based on the reduction of the RB stiffness. However, without knowledge of loads and design data there is no information about the ultimate limit state or the remaining lifetime. Within the research project MultiMonitor RB, a consortium consisting of two institutes of the Leibniz University Hannover, two Fraunhofer Institutes and two companies (Wind MW and Woelfel Engineering) will design and manufacture a full-scale rotor blade were all construction documents are available for building a complete FEM model. In addition, hardware and software methods for SHM will be developed. The RB will then be instrumented and tested to investigate the performance of the monitoring system. At the same time, the FEM model of rotor blade and test rig will be verified with test results. Furthermore, methods for calculating fatigue damage of fibre-reinforced plastics and investigations in the fracture mechanics of RB are also considered.

UR - http://www.scopus.com/inward/record.url?scp=85070860357&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85070860357

Y2 - 10 July 2018 through 13 July 2018

ER -