Experimental and Numerical Dynamic Behavior of Bending-Torsion Coupled Box-Beam

Abstract Purpose Structural configurations related to new green aircraft design require high efficiency and low weight. As a consequence, moderate-to-large deformation under operating loads arise aeroelastic instabilities different with respect rigid counterpart are possible. Coupled structural can provide the right mean overcome such critical situations selecting coupling parameters performance. In this work, dynamic behaviour of stiffened box-beam architecture selected optimal stiffener orientation emphasize bending-torsion characteristics has been investigated. Methods An extensive experimental activity performed for validation confirmation numerical results. Two cantilever beams produced technologies materials have tested. Modal performance determined by means laser Doppler vibrometer (LDV), while Finite-Element Method (FEM) simulation based on solid elements equivalent single layer approach applied compared. Experimental/numerical comparison presented pointing out specific natural frequencies modal shapes. Results The demonstrates good correlation in that remains mostly 4 $$\%$$ % . assurance criterion (MAC) considered comparing Conclusion proposed innovative configuration its capability be used problem as reduce their influence design. procedure equivalencing parts also validated dynamical response confirming possibility phase.