Dynamic Response Analysis of Offshore Platform under Blast

许继祥; 赵金城

doi:10.13409/j.cnki.jdpme.2013.04.017

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Dynamic Response Analysis of Offshore Platform under Blast

更新时间：2025-12-11

- Dynamic Response Analysis of Offshore Platform under Blast
- Vol. 33, Issue 4, Pages: 389-393(2013)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2013.04.017
  CLC： 75
- Published：2013
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[1]许继祥,赵金城.爆炸荷载作用下海洋平台结构的动力响应分析[J].防灾减灾工程学报,2013,33(04):389-393.

许继祥, 赵金城. Dynamic Response Analysis of Offshore Platform under Blast[J]. 2013, 33(4): 389-393.
[1]许继祥,赵金城.爆炸荷载作用下海洋平台结构的动力响应分析[J].防灾减灾工程学报,2013,33(04):389-393. DOI： 10.13409/j.cnki.jdpme.2013.04.017.

许继祥, 赵金城. Dynamic Response Analysis of Offshore Platform under Blast[J]. 2013, 33(4): 389-393. DOI： 10.13409/j.cnki.jdpme.2013.04.017.

摘要

采用理想化的压力—时间曲线模拟爆炸冲击荷载

压力—时间曲线为简化的三角形荷载形式。考虑应变率效应对钢材的影响

应用LS-DYNA有限元分析软件

对导管架海洋平台在爆炸冲击荷载作用下的动力响应进行数值模拟和分析

得到了不同峰值爆炸荷载作用下

海洋平台结构上层甲板、中层甲板和立面结构重要节点的动力响应时程曲线。结果表明:上层甲板和中层甲板节点竖向位移的绝对值随着爆炸荷载峰值压力的增大而增大

当爆炸荷载峰值压力为20～70kPa时

节点区域内均处于弹性状态

当爆炸荷载峰值压力为80kPa时

节点区域内进入了塑性状态。立面平台节点的水平位移随着爆炸荷载峰值压力的增大而增大

当爆炸荷载峰值压力为20～80kPa时

节点区域内进入塑性状态。

Abstract

Idealized pressure-time curve is adopted to simulate explosion load.The pressure-time curve represents simplified triangular load.Considering the influence of strain rate effect on steel

numerical simulation and analysis of dynamic response of jacket offshore platform under blast are performed by LS-DYNA software.Dynamic time-history response curves of key nodes in the upper deck

middle deck and vertical structure under different blast load are obtained.Results show that the absolute values of vertical displacements of the upper deck and middle deck nodes increase with increase of explosion load peak pressure.When the explosion load peak pressure ranges from 20 to 70 kPa

the material near these nodes is in the elastic stage.When explosion load peak pressure reaches 80kpa

the material enters the plastic stage.Horizontal displacements of elevation platform nodes increase with increase of explosion load peak pressure.Material near monitoring points in elevation platform enters plastic stage when explosion load peak pressure varies from 20 to 80 kPa.

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references

Risk-Identification-Based Hybrid Method for Estimating the System Reliability of Existing Jacket Platforms Under Fire [J]. 许继祥,赵金城,段海娟. Journal of Shanghai Jiaotong University（Science） . 2013(01)

偶然灾害下海洋平台损伤结构体系可靠性分析 [J]. 金伟良,何勇,宋剑. 浙江大学学报(工学版) . 2006(09)

海洋平台结构在偶然灾害作用下的可靠性研究 [D]. 宋剑. 浙江大学 2005

海底管线在偶然性载荷下的可靠性分析 [D]. 周磊. 天津大学 2008

海洋工程防爆墙结构有限元分析 [D]. 曲海富. 天津大学 2007

An efficient nonlinear dynamic approach for calculating wave induced fatigue damage of offshore structures and its industrial applications for lifetime extension [J] . Junbo Jia. Applied Ocean Research . 2008 (3)

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