受圆形表面单面约束的点锚固圆环热屈曲分析

应用Ｗ．Ｔ．Ｋｏｉｔｅｒ的初始后屈曲理论，研究了受圆形混凝土表面单面约束的点锚固圆环的热屈曲问题，根据混凝土容器壁的几何约束条件，假设了圆环的合理屈曲模状，得出了圆环在两锚固点之间发生屈曲的临界温度，并研究了其后屈曲性态和缺陷敏感性。结果表明，临界点和后屈曲路径的平衡均为稳定的，圆环对于与屈曲模态形状相同的缺陷是不敏感的。

THERMAL BUCKLING ANALYSIS OF A POINT-ANCHORED CIRCULAR RING SURROUNDED BY A CIRCULAR SURFACE

W.T.Koiter's initial pet-buckling theory is adopted to investigate the title problem.The buckling mode of the point-anchored ring is assumed accordins to the geometric constraintsof the concrete vessel.The formula for calculating the critical temperature at which the ring willbuckle between two anchors is obtained and its post-buckling behavior and imperfection senstivity are investigsted.The results show that both the Stsbility at the critical point and the equilibrium of the post-buckling path of the ring are stable,and the ring is not sensitive to initial imperfections in the shape of the buckling mode.