热等静压炉用预应力钢丝缠绕芯筒屈曲失效分析*

doi:10.13385/j.cnki.vacuum.2026.04.05

摘要/Abstract

摘要： 以某型热等静压炉用双层筒壁芯筒为研究对象,基于圆筒屈曲理论,探究等剪切力预应力钢丝缠绕层对芯筒屈曲失效行为的影响。采用弹性预应力屈曲分析与弹塑性屈曲分析两种数值仿真方法,将仿真得到的外压屈曲临界压力与基于经典Bresse-Bryan公式的解析值进行对比验证。结果表明：Bresse-Bryan公式的解析值与数值仿真结果存在显著偏差,且解析值偏高,无法准确表征芯筒的实际外压承载能力;相较于弹性预应力屈曲分析结果及解析值,弹塑性屈曲分析的计算结果与实际承载特性的吻合度更高。进一步探究双层筒壁的层间间隙、滑移效应及水冷槽结构对芯筒外压屈曲临界压力的影响,发现层间间隙增大、界面摩擦系数降低及水冷槽的设置,均会导致芯筒外压屈曲临界压力下降。本文研究成果为预应力钢丝缠绕芯筒结构的外压屈曲失效分析提供了理论支撑与工程设计指导。

关键词: 屈曲, 热等静压, 芯筒, 预应力, 弹塑性

Abstract: Taking the double-walled core barrel of a certain type of hot isostatic pressing (HIP) furnace as the research object, this study investigates the influence of the equal shear stress pre-stressed steel wire winding layer on the buckling failure behavior of the core barrel based on the cylindrical buckling theory. Two numerical simulation methods, namely elastic prestressed buckling analysis and elastoplastic prestressed buckling analysis were adopted. The critical external pressure for buckling obtained from the simulations is compared and verified with the analytical value derived from the classical Bresse-Bryan formula. The results show that there is a significant deviation between the analytical value of the Bresse-Bryan formula and the numerical simulation results, with the analytical value being excessively high, which fails to accurately characterize the actual external pressure-bearing capacity of the core barrel. Compared with the results of the elastic pre-stressed buckling analysis and the analytical value, the calculation results of the elastoplastic pre-stressed buckling analysis exhibit the highest agreement with the actual bearing characteristics. Further investigations into the effects of interlayer gap, slip effect, and water-cooling groove structure of the double-walled barrel on the critical external pressure for buckling reveal that an increase in interlayer gap, a decrease in interfacial friction coefficient, and the presence of water-cooling grooves all lead to a decrease in the critical external pressure for buckling of the core barrel. The research results of this paper may provide theoretical support and engineering design guidance for the external pressure buckling failure analysis of pre-stressed steel wire-wound core barrel structures.

Key words: buckling, HIP, core barrel, prestress, elastoplastic

中图分类号: TH122,O344.3

顾玉钢, 张雨晨, 李忠仁, 陈永东. 热等静压炉用预应力钢丝缠绕芯筒屈曲失效分析^*[J]. 真空, 2026, 63(4): 31-38.

GU Yugang, ZHANG Yuchen, LI Zhongren, CHEN Yongdong. Buckling Failure Analysis of Pre-stressed Steel Wire-Wound Core Barrel for HIP[J]. VACUUM, 2026, 63(4): 31-38.

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