Passive Load Alleviation Bi-stable Morphing Concept
AF Arrieta (Technische Universitat Darmstadt, Germany), O Bilgen, MI Friswell (Swansea University) & P Hagedorn (Technische Universitat Darmstadt, Germany)
AIP Advances, Vol. 3, No. 2, September 2012, paper 032118
In wind turbines, large loads caused by fluid structure interaction leading to fatigue failure and added robustness to withstand high bending stresses on the root of blades constitute important design bottlenecks. Implementation of morphing offers a potential solution for such challenges in wind turbine blades. In this letter, a passive load alleviating bi-stable morphing concept is proposed. A bi-stable specimen designed to have different stiffness and dynamic response characteristics on each stable state is devised as a compliant structure. Passive alleviation mechanisms require no active components to achieve the load alleviation objective, resulting in lighter and simpler designs in comparison to actively morphed solutions.
This material has been published in the AIP Advances, Vol. 3, No. 2, September 2012, paper 032118. AIP Advances is an open access journal.
Link to paper using doi: 10.1063/1.4739412
Direct link to paper on AIP Advances website