Work

Impact Energy Absorption Behavior of Unequal Strength Liquid Storage Structures Under Drop Hammer Impact

Year: 2025

Type: article

Abstract: To enhance the impact resistance and protective performance of ship double-bottom liquid tanks, a liquid storage structure with unequal panel strength was designed. Drop hammer impact experiments and finite element simulations were carried out under ten different working conditions. Based on the experimental and numerical findings, the failure morphology, dynamic response, energy absorption characteristics, and protection mechanisms of the structure were systematically analyzed. By quantifying the plastic limit ratio between the front and rear wall panels, the relationship between strength matching and energy dissipation was revealed. The findings demonstrate that reducing the strength of the rear wall panel promotes large-deflection plastic deformation, which facilitates directional energy dissipation and reduces both the deformation and energy absorption of the bottom panel. Furthermore, the strength matching between the front and rear panels causes asymmetry in the dynamic response during impact. Increasing the plastic limit ratio enhances the protective capability of the structure, providing a valuable reference for the design of unequal-strength double-bottom liquid tanks in ships.

Source: Applied Sciences

DOI: 10.3390/app151810211

Authors: Zhenghan Chen, Yongqing Li, Dian Li, Hailiang Hou

Institution: Naval University of Engineering

Language: English

Topic: Structural Response to Dynamic Loads

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: National Natural Science Foundation of China, Nanjing University of Science and Technology, Nanjing University