摘要
充气式减速器的折叠展开性能和气动承载能力是其安全性评估和结构设计中的两个关键问题。充气式减速器包括防热层、多个气囊圆环和连接件等子机构,难以通过直接折叠方法建立符合实际情况的折叠模型。提出一种新型基于逆向建模的充气式减速器折叠展开动力学数值计算方法,以一个典型减速器结构为实例,采用分步力学加载进行压缩获得整体折叠模型,基于控制体积法对展开成形过程进行数值计算,并进行气动承载分析。结果表明:本文提出的方法能够建立符合实际情况的复杂折叠结构系统,充气速率、压强对展开过程具有较大的影响,不充分充气会造成防热层表面褶皱和产生应力集中问题,并影响整体结构的气动承载性能。
The folding and development performance and aerodynamic bearing capacity of the inflatable aerodynamic decelerator are two key issues in its safety evaluation.The inflatable aerodynamic decelerator includes submechanisms such as a heat shield,multiple airbag torus and straps,it is difficult to establish a folding model that conforms to the actual situation through direct folding methods.A new numerical calculation method of folding and unfolding dynamics of inflatable aerodynamic decelerator based on reverse modeling is proposed in this paper.Taking a typical structure as an example,the whole folding model is obtained by compression with step-by-step mechanical loading.The numerical calculation of the unfolding process is carried out based on the control volume method,and the aerodynamic loading analysis is carried out.The results show that the proposed method can establish a complex folding structure system that conforms to the actual situation.The inflation rate and pressure have a great influence on the expansion process.At the same time,insufficient inflation will cause wrinkles on the surface of the heat-resistant layer and stress concentration,and affect the aerodynamic bearing performance of the overall structure.
作者
雷庆
薛齐文
杨海天
刘飞
张贺
刘旭东
何宜谦
LEI Qing;XUE Qiwen;YANG Haitian;LIU Fei;ZHANG He;LIU Xudong;HE Yiqian(Department of Engineering Mechanics,Dalian University of Technology,Dalian 116024,China;School of Civil Engineering,Dalian Jiaotong University,Dalian 116028,China;Space Engineering General Department,China Aerospace Science and Industry Corporation Limited,Beijing 100854,China)
出处
《航空工程进展》
2025年第4期155-167,共13页
Advances in Aeronautical Science and Engineering
基金
国家自然科学基金(12072063)
辽宁省科技计划联合计划项目(2023JH2/101700287)
辽宁省兴辽英才计划项目(XLYC2002108)
大连市支持高层次人才创新创业项目(2021RD16)。
关键词
充气式减速器
折叠建模
逆向工程
充气展开
结构褶皱
气动承载
inflatable aerodynamic decelerator
folding modeling
reverse engineering
inflatable expansion
structural wrinkle
aerodynamic bearing
