Cristina Riso, Fausto G. Di Vincenzo, Markus Ritter, Carlos E. S. Cesnik, Franco Mastroddi

DOI Number: N/A

Conference number: IFASD-2017-170

A novel approach is presented to compute nonlinear aeroelastic trim of highly flexible aircraft by coupling off-the-shelf solvers for structures and aerodynamics. The methodology includes an inertia relief algorithm for large displacements to perform nonlinear static analysis of unrestrained bodies, which is currently not possible in commercially available finite element codes. This feature allows to simulate free-free boundary conditions at each step of the nonlinear aeroelastic trim iterative solution sequence. The proposed approach is implemented by coupling the MSC.Nastran nonlinear structural solver SOL 400 with a three-dimensional vortex lattice method code. Loads and displacements interpolations between aerodynamic and structural grids are performed using MSC.Nastran six degree-of-freedom splines. The computational environment is tested on a beam-type model of the University of Michigan’s X-HALE, a highly flexible experimental unmanned aerial vehicle for nonlinear aeroelastic flight tests. Numerical results are compared with the University of Michigan’s Nonlinear Aeroelastic Simulation Toolbox and with an aeroelastic solver developed at the German Aerospace Center.

Read the full paper here

In Categories: 1.Events, Highly Flexible Aircraft Structures, IFASD 2017
Email
Print
LinkedIn
The paper above was part of  proceedings of a CEAS event and as such the author has signed a publication agreement to have their paper published in the repository. In the case this paper is found somewhere else CEAS always links to the other source.  CEAS takes great care in making the correct content available to the reader. If any mistakes are found  in the listings please contact us directly at papers@aerospacerepository.org and we will correct the listing promptly.  CEAS cannot be held liable either for mistakes in editorial or technical aspects, nor for omissions, nor for the correctness of the content. In particular, CEAS does not guarantee completeness or correctness of information contained in external websites which can be accessed via links from CEAS’s websites. Despite accurate research on the content of such linked external websites, CEAS cannot be held liable for their content. Only the content providers of such external sites are liable for their content. Should you notice any mistake in technical or editorial aspects of the CEAS site, please do not hesitate to inform us.