基于静态模型和应变率模型的特殊螺纹接头有限元分析

Finite Element Analysis of Premium Connection Base on Static Model and Strain Rate Model

利用ABAQUS软件,分析L80钢级HSM-2特殊螺纹接头静态模型和应变率模型对上扣扭矩、应力应变及密封接触压力的影响,并与实测结果进行对比。对比分析结果表明:采用静态模型计算时,其屈服扭矩结果严重偏小,并出现特殊螺纹接头过早到达屈服扭矩的假象,等效塑性应变结果偏大;采用应变率模型计算的屈服扭矩结果比较符合实际,材料屈服强度得到提高;静态模型和应变率模型对密封性能的计算结果基本一致。

The effects of the static model and strain rate model used for the L80 HSM-2 premium connection on the calculation of make-up torque, stress strain and sealing contact pressure are analyzed by use of ABAQUS software and the analysis is compared with the experimental cases. The results show that the yield torque is seriously low, the yield torque of the premium connection appears prematurely and the equivalent plastic strain is higher when calculating by the static model, while the yield torque conforms to the actual cases with the material strength increased when calculating by the strain rate model. The calculation results of the sealing performance are basically consistent when calculating either by the static model or by the strain rate model.