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首页> 外文会议>ASME international conference on ocean, offshore and arctic engineering >NUMERICAL STUDY ON THE RESIDUAL ULTIMATE STRENGTH OF HULL GIRDER OF A BULK CARRIER AFTER SHIP-SHIP COLLISION
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NUMERICAL STUDY ON THE RESIDUAL ULTIMATE STRENGTH OF HULL GIRDER OF A BULK CARRIER AFTER SHIP-SHIP COLLISION

机译：船舶碰撞后散货船船体梁残余极限强度的数值研究

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摘要

The purpose of the present study is to investigate residual Ultimate Longitudinal Strength (ULS) of bulk carriers after ship-ship collision. A series of a large-scale explicit finite element analysis (FEA) as well as simplified analysis (SA) are carried out using a cape size bulk carrier. In order to accurately investigate collapse mechanism of "damaged ships" under vertical bending moment nonlinear FEA are carried out where two steps analysis is adopted. First step is ship-ship collision analysis; Second step is ULS analysis of the damaged ship. Ship-ship collision analysis is carried out assuming the right angle collision at the midship region of the struck ship, and damage extent of the struck ship is estimated with varying collision speed of 3kt, 6kt, 9kt and 12kt. In the second step of analysis, residual ULS analysis is carried out taking into account residual stress and deformation of the struck ship caused by ship-ship collision. Collapse mechanism of the bulk carrier in damaged condition due to sagging moment as well as combination of longitudinal and horizontal bending moment is investigated and discussed in detail. ULS of hull girder of the bulk carrier in intact condition is also estimated and compared with that in damaged condition. The effect of damaged condition on the reduction of ULS is discussed in detail. Finally some of numerical methodologies are summarized in assessing residual ULS of hull girder after collision.
机译：本研究的目的是调查散货船在船舰碰撞后的残余极限纵向强度（ULS）。使用海角尺寸的散装货船进行了一系列大规模的显式有限元分析（FEA）和简化分析（SA）。为了准确研究垂直弯矩作用下“破损船”的坍塌机理，采用非线性有限元分析法，采用两步法进行分析。第一步是船舶碰撞分析;第二步是对受损船舶进行ULS分析。假设在撞船中部区域发生直角碰撞，则进行船撞分析，并以3kt，6kt，9kt和12kt的不同碰撞速度估算撞船的损坏程度。在分析的第二步中，考虑到因船舶碰撞而导致被撞船的残余应力和变形，进行了残余ULS分析。研究并讨论了由于垂度力矩以及纵向和横向弯曲力矩的组合而导致受损状态下散装货船的坍塌机理。还估计了完好状态下散货船船体梁的ULS，并将其与受损状态下的ULS进行了比较。详细讨论了受损状况对减少ULS的影响。最后总结了一些数值方法，以评估碰撞后的船体梁残余ULS。

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