摘要
利用有限元软件对-15°台肩、-5°台肩和直角台肩3种特殊螺纹接头,在上扣、上扣+拉伸和上扣+压缩条件下进行模拟计算。根据模拟计算结果分析得出:在上扣过程中,台肩角度变化对特殊螺纹接头密封面处密封性能影响很大,而对台肩辅助密封性能影响不大;在上扣+拉伸载荷条件下,台肩角度变化对接头密封面处的接触应力影响不大,而台肩的辅助密封性能随着管端与台肩的脱离分开而失效;在上扣+压缩载荷条件下,-15°台肩接头密封面的密封性能最佳,压缩载荷对台肩辅助密封性能影响不大。
For the sealing performances of three premium connections with -15°, -5° and right-angle shoulders separately, simulation calculations are conducted under the conditions of making-up, making-up＋tensile loading, and making-up＋compressive loading. The analysis of the simulation calculations reveals the facts as follows. Under the making-up condition, any change of the shoulder angle remarkably affects the sealing performance of sealing surface of the premium connection, but only slightly affects the shoulder＇s auxiliary sealing performance. Under the making-up＋tensile loading condition, any change of the shoulder angle just slightly affects the contact stress at the sealing surface of the connection, whereas the shoulder＇s auxiliary sealing performance fails along with disengagement and opening between the pipe end and the shoulder. And under the making-up＋compressive loading condition, the 15° shoulder connection shows the best sealing performance on the sealing surface, and likely, the compressive loading produces little effect on the shoulder＇s auxiliary sealing surface.
出处
《钢管》
CAS
2014年第4期53-56,共4页
Steel Pipe
关键词
特殊螺纹接头
密封性能
台肩角度
有限元分析
premium connection
sealing performance
shoulder angle
finite element analysis（FEA）
