Enhanced design considerations on the buckling and dynamics of Gannet-inspired systems during water entry

To provide a more complete analysis of Gannet birds and Gannet-inspired drones during diving, this
work considers an improved beam model to describe the static and dynamic characteristics of Gannet
and Gannet-like drones at impact. The beam model consists of two different geometric and material
property beams under continuity conditions to better understand the geometrical and material
parameters ’ influence on the structural statics and dynamics of these kinds of systems. Using
Hamilton ’s principle, the equations of motion, continuity, and boundary conditions considering
Euler –Bernoulli and Timoshenko theories are derived. Then, applying the continuity and boundary
conditions, the static and dynamic analyses are conducted to examine the impact buckling speeds, the
buckled shapes, the natural frequencies at different impact velocities for bioinspired drone design,
and the post-buckled mode shapes. The buckled configurations suggest that the body of the Gannet
most likely has a di...

Source: Bioinspiration and Biomimetics - January 1, 2021 Category: Science Authors: S Zimmerman and A Abdelkefi Source Type: research