双层耐压加筋圆柱壳结构承载能力与抗爆性能分析

Analysis of bearing capacity and blast resistance of double stiffened pressure-resistant cylindrical shell structure

    摘要
  • 摘要:
    目的 为了探究不同层间加强筋形式对双层圆柱壳承载能力与抗爆性能的影响，对4种双层加筋圆柱壳在静水压力与水下爆炸载荷下的响应进行数值研究。
    方法 首先，建立等质量不同结构形式加筋圆柱壳的有限元模型；然后，利用有限元软件ANSYS计算分析圆柱壳的结构形式对圆柱壳强度、稳定性和极限承载能力的影响；最后，利用有限元软件Abaqus/Explicit计算分析圆柱壳的结构形式对圆柱壳在爆炸载荷下的变形和塑性应变的影响。
    结果 结果显示，与等质量的传统单层加筋圆柱壳结构相比，I形加强筋双层圆柱壳的承载能力具有较大的优势；当爆炸载荷水平较低时，肋骨间距较小的双层圆柱壳的抗爆性能相当，而当爆炸载荷水平较高时，肋骨间距较小的双层圆柱壳的抗爆性能则会降低。
    结论 研究表明，合理设计双层加筋圆柱壳的结构形式能够获得承载能力与抗爆综合性能较好的设计方案。

     

    Abstract:
    Objective In order to explore the effects of different stiffening configurations on the bearing capacity and anti-blast performance of double stiffened cylindrical shells, a numerical study is made of the responses of four kinds of double stiffened cylindrical shells under hydrostatic pressure and underwater explosion load.
    Methods First, finite element models of stiffened cylindrical shells with different structural forms are established. Next, finite element software ANSYS is used to calculate and analyze the influence of each structural form on the strength, stability and ultimate bearing capacity of the cylindrical shell. Finally, finite element software Abaqus/Explicit is used to calculate and analyze the influence of each structural form on the deformation deflection and plastic strain of the cylindrical shell under explosion load.
    Results Compared with a traditional single stiffened cylindrical shell with the same mass, the I-shaped double stiffened cylindrical shell has a great advantage in carrying capacity. When the explosion load level is low, the anti-blast performance of a double cylindrical shell with small rib spacing is similar, but decreases when the explosion load level is high.
    Conclusion The reasonable design of double stiffened cylindrical shells can yield better design schemes for bearing capacity and anti-blast performance.

     

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