小型航煤储罐的吸瘪机理

Collapse mechanism of small aviation kerosene tank

刘小川¹; 刘硕²; 顾成曦²; 许晶禹²

1. 中国航空油料有限责任公司；2. 中国科学院力学研究所

LIU Xiaochuan¹;  LIU Shuo²;  GU Chengxi²;  XU Jingyu²

1. China National Aviation Fuel Co. Ltd.; 2. Institute of Mechanics, Chinese Academy of Sciences

储罐; 特征值屈曲分析; 非线性屈曲分析; 缺陷; 有限元

storage tank;  eigenvalue buckling analysis;  nonlinear buckling analysis;  defect;  finite element

针对新疆某100 m3 航煤储罐的吸瘪事故，采用数值仿真技术，通过高阶壳单元有限元模型进 行了特征值屈曲分析和非线性屈曲分析，对小型航煤储罐的吸瘪机理进行了详细探讨。通过储罐运 行参数确定罐体承受负压范围，通过模态分析确定无缺陷罐体承受的极限负压，对比了不同工况下 储罐的变形和受力分布，确定了有缺陷储罐极限负压。研究表明，单纯负压并不能导致储罐吸瘪，初 始缺陷和呼吸不畅引发的负压共同导致储罐吸瘪，同时可根据临界载荷确定吸瘪时的储罐呼吸阀通 气量。研究成果可为储罐的修复及后续安全生产提供参考。（图8，表2，参20）

In order to investigate the reason for collapse of a 100 m3 aviation kerosene storage tank in Xinjiang, eigenvalue buckling analysis and nonlinear buckling analysis were conducted with the numerical simulation technology based on the finite element model (FEM) of a high-order shell unit, and the collapse mechanism of small aviation kerosene was discussed in detail. According to the operation parameters of the tank, the bearing capacity of negative pressure was determined for the tank, and through modal analysis, its ultimate bearing capacity of negative pressure was determined for the tank without any defect. The deformation and stress distribution of the tank under various working conditions were compared, and the ultimate bearing capacity of negative pressure for the defective tank was determined. The study shows that only the negative pressure itself could not have led to the collapse of tank, but the initial defect together with the negative pressure caused by unsmooth breathing could result in collapse of tank. Additionally, the ventilation rate of the breathing valve at the moment the tank collapses can be determined based on the critical load. The study results could provide reference for the repair and subsequent safe operation of the tank. (8 Figures, 2 Tables, 20 References)