含凹坑缺陷的推进剂储存容器安全性评价  

Safety evaluation of propellant storage container with pit defects

作　　者：刘宗虎 王富强 LIU Zonghu;WANG Fuqiang(Xi’an Aerospace Test Technology Research Institute,Xi’an 710100,China)

机构地区：[1]西安航天动力试验技术研究所,陕西西安710100

出　　处：《化工科技》2020年第2期11-16,共6页Science & Technology in Chemical Industry

基　　金：国家自然科学基金项目(51301132)。

摘　　要：利用ANSYS有限元分析软件对含凹坑缺陷推进剂储存容器的安全性进行评价,通过建立球形凹坑缺陷模型,分别研究了不同缺陷直径和缺陷深度下,缺陷部位的等效应力分布规律,并对补强后的凹坑缺陷位置的最大等效应力进行了分析。研究结果表明,凹坑缺陷部位均出现了应力集中现象,且随着缺陷直径和深度的增加,最大等效应力均出现增大趋势;缺陷深度对最大等效应力的影响程度要高于缺陷直径,占主导作用;采取补强措施可以有效降低凹坑附近的应力集中现象。该结论为推进剂储存容器的安全评定提供了理论依据,也为容器的保养和维护维修提供了理论支持。The ANSYS software was used to evaluate the safety of pit-containing propellant storage containers.By establishing a spherical pit defect model,the equivalent stress distribution law of the defect part is studied with different defect diameters and depth.The equivalent stress of the pit defect position after reinforcement is also analyzed.The results show that the stress concentration phenomenon occurs in the defect parts,and the maximum equivalent stress increases with the increase of the diameter and depth of the defect.The effect of the defect depth on the maximum equivalent stress is higher than that of the defect diameter.Taking reinforcement measures can effectively reduce the stress concentration near the pit.This conclusion provides a theoretical basis for the safety assessment of propellant storage containers,and also provides theoretical support for the maintenance of the containers.

关 键 词：推进剂储存容器 凹坑缺陷 等效应力 安全评价 

分 类 号：V433[航空宇航科学与技术—航空宇航推进理论与工程]