基于模态分析的推进剂贮罐结构改进及挤出效率试验研究  

Improvement of Propellant Tank Structure Based on Modal Analysis and Experimental Research of Extrusion Efficiency

作　　者：吴港本 庄仲羽 张抖 张瑜 Wu Gangben;Zhuang Zhongyu;Zhang Dou;Zhang Yu(Beijing Institute of Aerospace Test Technology,Beijing 100074)

机构地区：[1]北京航天试验技术研究所,北京100074

出　　处：《中国化工装备》2025年第2期20-24,共5页China Chemical Industry Equipment

摘　　要：推进剂贮罐作为液体推进剂转运过程中容器,如果运输过程发生共振会导致贮罐破坏,进而造成严重损失,故贮罐结构动态设计尤为重要。本文运用有限元软件ANSYS Workbench建立了肼类推进剂贮罐的参数化模型,对其进行模态分析,并根据计算结果对初始贮罐结构进行改进;此外对贮罐进行挤出效率试验,验证其功能性。结果发现初始结构前6阶固有频率与运输车辆工作频率有重合,存在发生共振的可能,并且从振型云图中发现插底管与贮罐下封头存在干涉。对贮罐插底管及固定装置进行改进设计后,较初始结构最低阶固有频率值增加了15.01Hz,提高了33.73%,最大形变位移减小了59.90mm,降低了51.85%;此外贮罐挤出效率试验结果均大于95%,由此可知结构设计较为合理,为今后推进剂贮罐结构优化设计及结构动态设计提供了参考。As a container in the process of liquid propellant transfer,the dynamic design of the tank structure is particularly important because the resonance of the propellant storage tank during transportation will lead to the destruction of the storage tank and then cause serious losses.In this paper,the finite element software ANSYS Workbench is used to establish a parametric model of the hydrazine propellant tank,and the modal analysis is carried out,and the initial tank structure is improved according to the calculation results.In addition,the extrusion efficiency test of the tank was carried out to verify its functionality.The results show that the natural frequencies of the first 6th order of the initial structure coincide with the working frequencies of the transport vehicle,and there is a possibility of resonance,and it is found that there is interference between the intubation tube and the lower head of the storage tank from the mode shape contour.After the improved design of the bottom pipe and fixing device of the storage tank,the natural frequency value of the lowest order of the initial structure was increased by 15.01Hz,increased by 33.73%,and the maximum deformation displacement was reduced by 59.90mm,which was reduced by 51.85%.In addition,the test results of the extrusion efficiency of the storage tank are all greater than 95%,which shows that the structural design is reasonable,which provides a reference for the optimal design of the propellant storage tank structure and the dynamic design of the structure in the future.

关 键 词：贮罐 模态 结构改进 挤出效率 

分 类 号：V51[航空宇航科学与技术—航空宇航推进理论与工程]