板架结构与冰体挤压作用模型试验研究

Model test study on the extrusion action between plate frame structure and ice

  • 摘要: 摘要:为研究船体典型板架结构在冰载荷作用下的结构变形及损伤失效机理,本文开展钢制船体板架与冰体的重复挤压碰撞试验。通过设计多组试验工况,考虑板架结构板厚、加强筋及缺陷等因素对试验结果的影响。研究表明:板厚对结构响应的影响起主导作用;加强筋能有效提高板架结构的抗冰挤压强度,且对于缺陷的止裂作用与加筋形式有关;当含损伤板架缺陷位置与冰载荷区域重合时,能观察到缺陷扩展现象,此时结构较为危险;结构强度更低的板架结构完成第一加载后,在第二次加载时表现出的强度会反超结构强度更高的板架。本文的该研究工作可为极地船舶结构抗冰强度设计及评估提供一定参考。

     

    Abstract: Abstract: In order to study the structural deformation and damage failure mechanism of typical hull plate frame structure under ice load , In this paper, the repeated extrusion and collision test of steel hull plate frame and ice body is carried out, and multiple sets of test conditions are designed, and the influence of factors such as plate thickness, stiffeners and defects on the test results is considered. The results show that the influence of plate thickness on the structural response plays a leading role, and the stiffeners can effectively improve the anti-ice extrusion strength of the plate frame structure, and the anti-extension effect on the defects is related to the form of stiffeners. When the defect position of the damaged plate frame coincides with the ice load area, the defect extension phenomenon will happen, and under this condition the structure is more dangerous; After the plate frame structure with lower structural strength completes the first loading, the strength exhibited by the plate frame structure with lower structural strength will exceed that of the plate with higher structural strength during the second loading. The research work in this paper can provide a reference for the design and evaluation of the ice-resistant strength of polar ship structures.

     

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