弯曲井眼中管柱屈曲行为研究

给出了描述弯曲井眼中管柱屈曲及后屈曲行为的解析结果。通过求解由平衡法得到的管柱屈曲平衡方程,得到了管柱的正弦屈曲的构型和螺旋屈曲构型的解析解。解析结果与相应的数值结果有良好的一致性。在此基础上,确定了管柱的初始屈曲临界载荷、保持正弦屈曲构型的最大载荷和螺旋屈曲临界载荷。由此,进一步得到了管柱在后屈曲进程中载荷与变形受力的关系。

STUDY ON THE BUCKLING BEHAVIOR OF PIPE STRING IN CROOKED HOLE

This paper presents the analytical solutions for descr ibing the initia l and subsequent buckling of pipe string in crooked hole. The analytical solutio ns for the sinusoidal and spiral buckling configurations are obtained from the e quilibrium equation, which is based on the equilibrium method. The results are h ighly consistent with the actual data, and the critical load for initial bucklin g and spiral buckling, the maximum load for maintaining sinusoidal buckling is f urther determined. The connection between load and deforming force in the proces s of subsequent buckling is also disclosed.