弯曲载荷下特殊螺纹接头密封性能的有限元分析

借助Abaqus软件建立了特殊螺纹接头弯曲性能分析有限元模型,并对某个规格特殊螺纹接头进行了纯弯曲的有限元分析。结果表明:随着弯矩的增加,拉伸面接触应力下降,接触长度减小,密封性能下降;而压缩面接触应力上升,接触长度增加,密封性能提高。这些结果说明提高特殊螺纹接头的弯曲性能需要同时提高接头的拉伸与压缩性能。

Finite Element Analysis of Sealability of Premium Connections Subjected to Bending Load

The finite element analysis（FEA）methodology for premium connections subjected to bending load is established with the software of Abaqus, and then used for pure bending property analysis of premium connections with a certain size. The results reveals that along with the increasing of the bending moment, the contact stress, contact length and sealability decrease in the tensile side, whereas all of these values increase in the compression side, which implies that for improving the bending property of the premium connection both the tensile property and compression property thereof should be enhanced, too.