引用本文: 张强, 安超, 许杰, 丁宇奇. 基于慢动力法的受压扭管柱静力屈曲分析[J]. 力学与实践, 2016, 38(4): 418-423,381.
ZHANG Qiang, AN Chao, XU Jie, DING Yuqi. BUCKLING ANALYSIS FOR TUBULAR COLUMN BASED ON SLOW DYNAMIC METHOD[J]. MECHANICS IN ENGINEERING, 2016, 38(4): 418-423,381.
 Citation: ZHANG Qiang, AN Chao, XU Jie, DING Yuqi. BUCKLING ANALYSIS FOR TUBULAR COLUMN BASED ON SLOW DYNAMIC METHOD[J]. MECHANICS IN ENGINEERING, 2016, 38(4): 418-423,381.

## BUCKLING ANALYSIS FOR TUBULAR COLUMN BASED ON SLOW DYNAMIC METHOD

• 摘要: 钻井和螺杆泵采油等管柱，作业时同时承受轴向压力和扭矩载荷作用，提出了慢动力法计算管柱的压扭屈曲问题.利用瞬态动力学方法解决静力学问题的思想，分析了慢动力法中载荷的施加，以及阻尼和子步数的选取策略.数值结果表明：在轴向压力与扭矩单独或同时作用时，求得的有限元解均与解析解吻合较好.文章还分析了慢动力法计算效率的影响因素.

Abstract: The tubular column of drilling and screw pumps is subjected to both the axial pressure and torque loads in operations. Slow dynamic method is proposed to calculate the column buckling torque and pressure. Based on the idea of the transient dynamics method in solving the statics problem, the loading, and the strategies of choosing the damping factor and sub-steps are analyzed. The numerical results show that when the axial pressure and torque are acted alone or simultaneously, the finite element solution is in good agreement with the analytical solution. This paper also analyzes the influencing factors of the computational effciency of the slow dynamic method.

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