connection under complex loads

 

 

SONG Weiwei1, JI Aimin1, LI Qian1, FAN Xinye2, XV Caibin2

 

(1. College of Mechanical and Electronic Engineering, Hohai University, Changzhou 213022, China;

 

2. Jiangsu Changbao Steeltube Co., Ltd., Changzhou 213018, China)

 

 

Abstract: Aiming at the problem of oil casing which is prone to failure and leak under complex loads, the stress and the contact pressure distribution rule of premium thread casing connection under complex loads along the sealing surface were investigated. According to the material properties and structural characteristics of casing connection, the model of casing connection was simplified; the finite element model of the casing connection was established in ANSYS software, including meshing, loading and constraint handle. Then the contact analysis module of ANSYS was used to calculate stress nephogram and contact stress nephogram under the makeup, the axial tension, the internal pressure and complex conditions. The connection and sealing performance of premium thread casing connection under different loads were investigated. The results indicate that each single load has a different effect on performance of connection. Axial tension has a greater influence on the sealing performance of connection. The internal pressure is beneficial to improve the sealing performance.

 

Key words: premium thread; ANSYS; contact analysis; complex loads; performance analysis