Page 17 - 理化检验-物理分册2024年第十二期

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专题报道 DOI:10.11973/lhjy-wl240256

某特种密封箱端盖固定件撕脱原因和优化改进

蔡 亮，刘宇盖
（上海材料研究所有限公司 上海市工程材料应用与评价重点实验室，上海 200437）

摘 要：某特种密封箱端盖固定件在工作时发生撕脱现象，造成附件掉落。对固定件撕脱机制进
行分析，得到该固定件撕脱原因为固定件强度不足和连接孔分布不合理。对固定件材料铺层层数进
行研究，提高了玻璃纤维的压缩率，增强了固定件材料的强度，对固定件连接孔分布进行仿真分析，
重新分布连接孔位置，改善了孔间应力的分布，减轻了因加工连接孔造成的玻璃纤维受损程度。通
过对固定件形状进行优化，进一步提高了固定件与端盖的黏接强度。经过试验验证，端盖固定件改
进措施提高了固定件的撕脱强度。
关键词： 端盖固定件；玻璃纤维；力学性能；仿真分析；黏接强度
中图分类号：TB33；TM743 文献标志码：A 文章编号：1001-4012(2024)12-0001-04

Causes and optimization improvement of a special sealing
box end cover fixed parts avulsion

CAI Liang, LIU Yugai

(Shanghai Institute of Materials Co., Ltd., Shanghai Key Laboratory of Engineer Materials
Application and Evaluation, Shanghai 200437, China)

Abstract: The end cover fixing part of a special sealing box was avulsed at work, which caused the attachment
to fall off. By analyzing the tearing mechanism of the fixed part, it was concluded that the reason for the avulsion of
the fixed part was the insufficient strength of the fixed part and the unreasonable distribution of the connecting holes.
The number of layers of the fixing part material was studied, the compression rate of the glass fiber was improved,
the strength of the fixing part material was enhanced, the distribution of the connecting hole of the fixing part was
simulated and analyzed, the position of the connecting hole was redistributed, the distribution of the stress between the
holes was improved, and the damage degree of the glass fiber caused by the processing connecting hole was reduced.
By optimizing the shape of the fixing part, the bonding strength between the fixing part and the end cover was further
improved. After experimental verification, the improvement measures of the end cover fixing parts improved the
avulsion strength of the fixing parts.
Keywords: end cover fixing part; glass fiber; mechanical property; simulation analysis; bonding strength

安全性是系统设计中一项重要的、需要关注的 密封箱端盖固定件及安装状态照片如图1所示。在
项目。文中涉及的固定件一般用于固定特种密封箱 某次飞行试验中，该型号端盖工作时有碎块飞出，在
[2]
端盖支撑附件，防止端盖开启时碎块在高温、高压、 燃气流冲刷的影响下 ，出现固定件撕脱损坏的现
高速气体（燃气流）的冲刷作用下二次受力，导致支 象，导致支撑件与端盖分离，严重威胁地面设备及工
撑附件脱落而砸伤地面设备及工作人员，该固定件
[1]
直接关系到系统工作的成功性和安全性 。某型号

收稿日期：2024-09-04
作者简介：蔡 亮（1991-） ，男，硕士，主要从事贮运发射箱端
盖技术的研究和产品研制工作
通信作者：刘宇盖，664560446@qq.com 图 1 某型号密封箱端盖固定件及安装状态照片
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