冰载荷作用下舷侧骨架典型节点有限元分析

Finite element analysis of typical structure of side stringer skeleton under ice load

    摘要
  • 摘要:
    目的 为了探索横骨架式破冰船在冰载荷作用下舷侧骨架典型节点的受力情况，需要针对舷侧典型节点进行数值分析。
    方法 首先，基于一艘PC2级重型破冰船，根据中国船级社（CCS）规范，对该型破冰船的冰载荷进行规范计算，得到本次计算的冰载荷；然后，采用有限元分析软件MSC/PATRAN创建舷侧骨架典型节点的有限元模型，在破冰船外板上施加具有代表性的冰载荷，计算舷侧骨架典型节点的应力状态；最后，通过不断变更典型节点形式，得到关注区域的应力分布差异。
    结果 不同典型节点形式应力大小的对比分析显示，在舷侧纵桁区域选择肋骨穿越，在甲板区域选择肋骨断开的结构形式更优。
    结论 总结并提出的破冰船舷侧骨架典型节点结构形式的设计要点可为肋骨穿越形式的结构设计提供一定的参考。

     

    Abstract:
    Objectives The force on the typical side skeleton nodes of a cross-skeleton icebreaker under ice load action is explored through the numerical analysis of such nodes.
    Methods First, based on a PC2 heavy icebreaker, according to China Classification Society (CCS) specifications, the ice load is calculated according to the relevant ice load specifications; next, MSC/PATRAN software is used to create a finite element model of the typical side skeleton nodes, and a representative ice load is applied to the outer plates of the icebreaker so as to obtain the stress state of the typical nodes; finally, by constantly changing the forms of the typical nodes, the stress distribution difference in the area of interest is obtained.
    Results The stress levels of different typical node forms are compared and analyzed, and it is concluded that the superior choices are ribs that cross through the side stringer area, and a structural form of rib disconnection in the deck area.
    Conclusions This paper summarizes and puts forward the design points of the typical structure form of an icebreaker's side skeleton, providing useful references for rib-crossing structural design.

     

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