Communication Dans Un Congrès Année : 2025

Nonlinear features of a wall-hitting ship under harmonic wave excitation

Résumé

Understanding the nonlinear dynamics of ship rolling is crucial due to the potential for chaotic vibrations that can lead to capsizing, especially since maritime routes are vital to global trade. This study investigates the nonlinear behavior of a ship interacting with harmonic waves while floating near a pier wall. The waves are modeled as harmonic excitations, and the distance between the ship and the wall plays a significant role in the system's dynamics. The ship's roll motion transitions from stable to chaotic, with high roll angles indicating a risk of capsizing. Numerical simulations show how impacts with the pier wall affect the dynamics, stabilizing the motion and reducing chaotic behavior. Results are presented through time series and bifurcation diagrams for various distances between the ship and the wall. The impact model is explored as a simple nonconservative interaction with energy loss represented by a restitution coefficient.

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Dates et versions

hal-05069742 , version 1 (15-05-2025)

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  • HAL Id : hal-05069742 , version 1

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Cesar Augusto Lampe Linhares Da Fonseca, Americo Cunha Jr. Nonlinear features of a wall-hitting ship under harmonic wave excitation. XX International Symposium on Dynamic Problems of Mechanics (DINAME 2025), Mar 2025, Águas de Lindóia, Brazil. ⟨hal-05069742⟩

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