Abstract: The buckling performances of stainless segmented toroidal pressure hulls were studied under uniform external pressure. The adopted segmented toroidal pressure hulls used was as 70.5 mm, the wall thickness was as 1.319 mm and the circumferential radius of rotation was as 134 mm. Six segmented toroidal models were manufactured and the geometric measurements, hydrostatic external force tests and numerical calculations were carried out. Then, the buckling behaviors of segmented toroidal pressure hulls were analyzed, along with the effects of the segmented angles and ring parameters on the buckling were investigated. The results show that the segmented angle is not influential on the buckling loads of segmented toroidal pressure hulls. The critical buckling load value remains constant and close to that of the connecting elements when the width and thickness of the segmented ring reach a certain threshold value.

Key words: toroidal pressure hull, segmented ring, segmented angle, buckling performance

摘要： 研究了不锈钢交接环形耐压壳在均匀外压作用下的屈曲性能。使用的交接环形耐压壳的截面半径为70.5 mm，壁厚为1.319 mm，圆周旋转半径为134 mm。制作了6个交接壳模型，并对其进行几何测量、静水外力试验和数值计算，在此基础上对交接环形耐压壳屈曲行为进行分析，研究了交接角度和环肋参数对屈曲的影响规律。结果表明，交接角度对交接环壳屈曲载荷没有影响，环肋的宽度和厚度达到一定阈值时，临界屈曲载荷值保持不变且接近于交接单元的屈曲载荷。

关键词: 环形耐压壳, 交接环肋, 交接角度, 屈曲特性