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基于有限元和虛擬樣機技術的螺紋與球鉸連接揚礦管整體水平運動

Lateral movement of lifting strings connected by screwed joints and spherical joints in deep sea by finite element analysis and virtual prototype technology

  • 摘要: 為了研究螺紋與球鉸連接兩種情況下的揚礦管系統的整體水平運動,建立了螺紋連接和球鉸連接揚礦管系統的幾何模型,分析了系統的受力和約束情況,并分別用有限元和虛擬樣機技術進行了4級海況時瞬時動態分析和動力學分析.結果表明:螺紋連接揚礦管系統的最大橫向偏移量較小,但是管體承受很大的彎矩;在球鉸連接的系統中偏移量為6m左右,管體不受彎矩,相當于柔性管,接頭應選用耐磨性較好的材料.

     

    Abstract: To study the lateral movement of pipe strings connected by screwed joints and spherical joints in deep sea, this paper built the models of the pipe strings and made comparison of their horizontal displacements. Under the four-level oceanic condition, the transiently dynamic and kinetic analyses of the pipe strings were carried out by finite element method and virtual prototype technology. The results show that the maximum lateral displacement of pipe strings connected by screwed joints is 2.1 m, and the maximum moment in this system is 8 400 N· m. While the maximum lateral displacement of pipe strings connected by spherical joints is 6.0 m, the moment in this system is zero, and the pipe strings can be considered as flexible pipes which can bear large axial force. Since the lateral movement of buffer periodically changes with time and its period is much longer than that of the waves, materials with better wearability are more suitable for spherical joint-connected pipe strings.

     

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