Influence of substrate geometric nonlinearity on the performance of a hybrid galloping energy harvester with D-shape-sectioned bluff body

Researchers have investigated how the geometric nonlinearity of a substrate affects the performance of a hybrid energy harvester. This device utilizes a D-shaped bluff body to capture energy from galloping motion. By applying Hamilton's principle, a new model was developed to account for this nonlinear substrate effect, enabling a detailed comparison with a traditional linear-substrate model. The study revealed significant differences in both energy output and dynamic behaviors, including periodic and chaotic vibrations, between the two models.

Understanding substrate nonlinearity is crucial for improving the efficiency and broadening the operational range of hybrid energy harvesters.