کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1720066 1520256 2014 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dynamics of steel offshore platforms under ship impact
ترجمه فارسی عنوان
دینامیک سیستم عامل های دریایی فولادی تحت تأثیر کشتی
کلمات کلیدی
سیستم عامل های فلزی دریایی، تأثیر انرژی بالا، برخورد کشتی، المان محدود، سیستم های پویا معادل
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی دریا (اقیانوس)
چکیده انگلیسی


• Dynamic response of single column with tip mass under transverse impact load.
• Definition of equivalent system for offshore dynamic response to bow impact.
• Ship impact with fixed offshore steel platforms – FEA.
• Definition of equivalent dynamic SDOF and equivalent static loading for evaluation of ship-platform high energy impact.

This paper deals with the prediction of the dynamic response of steel offshore platforms to high energy impacts from typical supply vessels. The contribution of the high modes of a cantilever beam type structure with a concentrated top mass subjected to transverse impact from rigid and deformable strikers is analysed. A procedure to develop simplified equivalent systems for efficient structural response analysis is presented and its reliability tested by comparing the results from the explicit non-linear FE simulations. Effects such as the overall rotation of the installation, plastic deformations in the contact area, different impact locations and different hinge mechanisms are taken into account. It is shown that the use of the proposed equivalent systems with a reduced number of DOF's can provide accurate results at significantly less computational efforts as compared to the FE simulations. The derivation of some parameters of the equivalent dynamic elastic–plastic SDOF/2SDOF systems, however, needs to consider the complexity of the analysed steel frames and perform preliminary non-linear static analyses. Therefore, further studies of different impact scenarios on platforms with different configurations are recommended to augment the results presented here.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Ocean Research - Volume 47, August 2014, Pages 352–372
نویسندگان
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