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| Simulation of impact load on ship-platform collision |
| Revised:June 24, 2002 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20041007 |
| KeyWord:impact load,offshore platform,collision,pile|soil|structure interaction,numerical analysis |
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| Abstract: |
| On basis of scathing inspected results of some offshore jacket platform with X diagonal brace impacted by the large tonnage Derrick & Lay Barge during installation of steel jacket structures, a numerical simulation analysis for collision process is developed, which cover that establish a static and dynamic analysis model for the ship|platform collision system and analyze the static equivalent intensity for the damaged X diagonal brace of platform structure. In the dynamic elastic-plastic analysis process, the added mass coefficients for the seawater dynamic effective and the pile-soil-structure interaction are considered; a nonlinear spring is introduced for the simulation of the force-deflection relationship of the local indentation for the damaged X diagonal brace, and the curves of indentation deformation of the damaged member versus the collision contact time is simulated under different ship velocity. According to the curves, the formula of indentation deformation of the damaged member and different collision contact time is obtained to determine the maximum impact load. This paper provides the analysis qualifications to evaluate the damage extent and choose feasible and reasonable repairing and strengthening schemes. |
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