Damage Identification Based on Adding Mass for Liquid–Solid Coupling Structures

Abstract

Damage identification for liquid–solid coupling structures remains a challenging topic due to the influence of liquid and the limitation of experimental conditions. Therefore, the adding mass method for damage identification is employed in this study. Adding mass to structures is an effective method for damage identification, as it can increase not only the experimental data but also the sensitivity of experimental modes to local damage. First, the fundamental theory of the adding mass method for damage identification is introduced. After that, the method of equating the liquid to the attached mass is proposed by considering the liquid–solid coupling. Finally, the effectiveness and reliability of damage identification, based on adding mass for liquid–solid coupling structures, are verified through experiments of a submerged cantilever beam and liquid storage tank.

Investigating the Influence of Fluid-Structure Interactions on Nonlinear System Identification

“…These assumptions have been widely used in numerical simulations investigating the influence of different geometric shapes [8,12], structural and fluid dynamic parameters [8,17]. Similar approaches have been used to detect damage in a structure submerged in fluid [18] and explore the thrust generation in swimming animals [19]. In particular, the quadratic damping function is simplified with linear damping to obtain exact solutions [20,21].…”