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Volume 10, Issue 20 (3-2015)                   Marine Engineering 2015, 10(20): 79-88 | Back to browse issues page

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Ezzati M, Zeinoddini M, Masoudi T. Assessment of Force-Deflection Relations of Steel Tubular Members under Lateral Quasi-Static Impacts from Dropped Objects. Marine Engineering 2015; 10 (20) :79-88
URL: http://marine-eng.ir/article-1-293-en.html
Assessment of Force-Deflection Relations of Steel Tubular Members under Lateral Quasi-Static Impacts from Dropped Objects
Mehdi Ezzati * 1, Mostafa Zeinoddini , Tahereh Masoudi
Abstract:   (5373 Views)
In the current study a numerical simulation approach has been chosen to simulate the force-deflection response of tubular member under lateral impact in the absence of internal pressure or axial force and the results have then been compared with analytical relations. Two series small scale experiments were carried out by the authors on X70 steel tubes and D/t of 22 and the numerical model has then been verified against experimental results. The results show that the analytical relations estimate greater lateral resistance than experimental results for the spherical indentor and in the unpressurized tubular members. The numerical model has then been used to study the effect of D/t and d/D and yield stress on lateral resistance of steel tubes. It has been noticed that, the lateral resistance was governed by: 1) D/t ratio 2) Yield stress 3) d/D ratio. The comparison between analytical and numerical results show that analytical relations are more accurate results for large D/t and d/D ratios.
Keywords: Offshore pipeline, Force-Deflection, Dent, Indentor, Lateral Impact
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Type of Study: Research Paper | Subject: Offshore Structure
Received: 2014/02/13 | Accepted: 2015/01/13
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