Water impact damage considering hydro-plastic interactions: Extensive experimental and numerical validation, and structural design recommendations
Year: 2024
Type: article
Abstract: Water impact damage can occur for ocean structures subjected to extreme waves as well as aeronautical vehicles during emergency water landing. The problem involves complicated fluid structure interaction (FSI) effects between large plastic structural deformations and fluid flow pressures, known as hydro-plasticity, and is not well understood. In 2019, the author’s research group proposed the first hydroplastic solution for water impact damage of beams and stiffened panels considering the mutual coupling effect. This paper utilizes results from model tests, real world wave impact accidents and coupled FSI numerical simulations to verify comprehensively the accuracy of the hydroplastic model in terms of the predicted structural damage and pressure histories. As most design standards use suggested pressure curves for design against extreme wave impacts in the maritime and offshore industries, the pressure histories predicted by the hydroplastic model are reapplied to the structures to calculate the structural responses using nonlinear finite element analysis (NLFEA). This is to test if the generated pressure histories can reproduce the water impact damage and be used as suggested design pressure curves. Finally, a new design procedure is suggested based on the hydroplastic model for the design of ocean structures against extreme wave impacts. The proposed design method suggests using impact velocities rather than design pressures in current design standards, as the main design parameter, the value of which should meet desired annual exceedance probability levels. The proposed design approach represents clear improvement and is useful for reliable and cost-effective design of structures against extreme water impacts.
Source: Marine Structures
Author: Zhaolong Yu
Institution: Norwegian University of Science and Technology
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,130
OpenAlex ID: W4405758586