宋子杰, 胡志强. 预测船舶碰撞与搁浅结构动力响应的程序实现[J]. 工程力学, 2018, 35(8): 245-256. DOI: 10.6052/j.issn.1000-4750.2017.03.0232
引用本文: 宋子杰, 胡志强. 预测船舶碰撞与搁浅结构动力响应的程序实现[J]. 工程力学, 2018, 35(8): 245-256. DOI: 10.6052/j.issn.1000-4750.2017.03.0232
SONG Zi-jie, HU Zhi-qiang. AN INTEGRATED ANALYTICAL METHOD TO PREDICT STRUCTURAL DYNAMIC RESPONSES OF SHIP STRUCTURE UNDER COLLISION AND GROUNDING SCENARIOS[J]. Engineering Mechanics, 2018, 35(8): 245-256. DOI: 10.6052/j.issn.1000-4750.2017.03.0232
Citation: SONG Zi-jie, HU Zhi-qiang. AN INTEGRATED ANALYTICAL METHOD TO PREDICT STRUCTURAL DYNAMIC RESPONSES OF SHIP STRUCTURE UNDER COLLISION AND GROUNDING SCENARIOS[J]. Engineering Mechanics, 2018, 35(8): 245-256. DOI: 10.6052/j.issn.1000-4750.2017.03.0232

预测船舶碰撞与搁浅结构动力响应的程序实现

AN INTEGRATED ANALYTICAL METHOD TO PREDICT STRUCTURAL DYNAMIC RESPONSES OF SHIP STRUCTURE UNDER COLLISION AND GROUNDING SCENARIOS

  • 摘要: 该文介绍一个综合性解析计算程序,可用于预测船舶在碰撞和搁浅场景下的强非线性结构动力响应,包括结构变形阻力及能量耗散。解析计算方法具有使用方便,计算速度快,计算结果相对可靠的优点,易于工程应用。预测船舶碰撞与搁浅结构动力响应的程序包含两个模块,分别是船舶碰撞场景模块和船舶搁浅场景模块。船舶在碰撞和搁浅场景中,船体外板和内板等构件在外载荷作用下会出现弯曲、膜拉伸和撕裂的变形模式;船体桁材构件在外载荷作用下会出现弯曲和褶皱压溃变形模式。船体构件损伤失效所产生的结构变形阻力和能量耗散以解析的方式表达。此外,采用LS_DYNA程序开展数值仿真,验证解析计算程序的准确性和合理性。综合解析计算程序在结构设计阶段,对船体结构的耐撞性和船舶风险评估,都具有一定的工程应用价值。

     

    Abstract: An integrated analytical method is introduced in this paper, which can be used to predict the nonlinear structural dynamic responses for the ships under accidental collision and grounding scenarios. The structural dynamic responses include resistance and energy dissipation. Analytical method has the advantages of cost-effective and fast-calculation. The proposed analytical method contains two modules, one of which is the ship collision module and the other is the ship grounding module. In both scenarios, the deformation mechanisms of shell plating include plastic bending, membrane stretching and tearing, and the mechanisms of web girders include plastic bending and folding. Resistance and energy dissipation of the ship structural components are expressed by analytical formulas. Furthermore, numerical simulations were also conducted with code LS_DYNA, in order to prove the feasibility of the analytical method. This integrated analytical method can be used to predict crashworthiness capability and risk assessment of the ships under collision and grounding scenarios during structural design stage.

     

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