Analysis of the anti-sliding performance of skirted edges on the submersible platforms using the CEL method

Abstract

Extreme weather conditions in marine environments significantly increase the risk of sliding for submersible platforms, making skirted edges design crucial for the platform's anti-sliding performance. However, the impact of skirted edges size parameters and arrangements on anti-sliding performance requires further investigation. This study employs the Coupled Eulerian-Lagrangian (CEL) method to establish a comprehensive simulation process for platform sliding. It analyses the effects of skirted edges length, thickness, and arrangements on anti-sliding performance. The findings indicate that increasing skirted edges length within a certain range improves anti-sliding performance, but when the length L equals 0.007D, 0.043D, or 0.06D (where D is the side length of the mat), anti-sliding performance sharply declines. Furthermore, an increase in skirted edges thickness T reduces the contact area with the soil, leading to a decrease in anti-sliding performance. By defining seven anti-sliding performance indicators, the study identifies the optimal skirted edges length L as 0.057D, thickness T as 0.0013D, and the best arrangement as orthogonal. This research reveals the influence of skirted edges shape on the anti-sliding performance of submersible platforms and establishes the optimal shape, providing important theoretical and design guidance for enhancing platform stability and ensuring safe operation.