基于模态的航天器快速动静载荷叠加算法研究  

Research On Superposition Algorithm of Fast Dynamic and Static Loads for Spacecraft based on Modes

作　　者：李枫 刘喆 谢子强 王晓伟[3] 张根辈 张广辉[2] LI Feng;LIU Zhe;XIE Zi-qiang;WANG Xiao-wei;ZHANG Gen-bei;ZHANG Guang-hui(China Academy of Launch Vehicle Technology,Beijing 170006,China;Harbin Institute of Technology,Harbin 150001,China;Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Jinling Institute of Technology,Nanjing 211169,China)

机构地区：[1]中国运载火箭技术研究院,北京100076 [2]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [3]南京航空航天大学能源与动力学院,江苏南京210016 [4]金陵科技学院机电工程学院,江苏南京211169

出　　处：《节能技术》2024年第1期33-38,43,共7页Energy Conservation Technology

基　　金：国家科技重大专项(2017-Ⅰ-0007-0008)。

摘　　要：为了快速计算航天器结构中动静载荷叠加的响应,需要在后处理时针对载荷进行组合负载。本文针对火箭薄壁加筋舱段结构的爆炸分离阶段进行了包络仿真研究,提出了基于模态数据进行坐标变化的快速动静载荷叠加响应算法,并采用数值积分方法进行求解,发现动静载荷叠加中若忽略相位的影响会导致航天器结构设计方案安全裕度较高的结果。本文对比了商用软件与基于模态的快速动静载荷叠加算法的响应计算结果,结果表明,计算结果基本一致但后者具有速度快、效率高的特点。本文还结合爆炸分离的载荷时序进行不同相位差、不同时间差下的多参数动响应优化。In order to quickly calculate the response of static and dynamic load superpositions in spacecraft structure,it is necessary to combine the loads for the loads during post-processing.In this paper,the envelope simulation research is carried out for the explosive separation stage of the rocket thin-walled reinforced cabin structure,and a fast dynamic and static load superposition response algorithm based on modal data for coordinate changes is proposed,and the numerical integration method is used to solve the problem.Neglecting the influence of the phase when static and dynamic loads are superimposed will lead to a higher safety margin in the design of the spacecraft structure.This article compares the response calculation results of the commercial software and the modal-based fast dynamic and static load superposition algorithm,it is found that the results are basically the same,but the latter has the characteristics of fast speed and high efficiency.In this paper,the multi-parameter dynamic response optimization under different phase differences and different time differences is also carried out in combination with the load time series of explosion separation.

关 键 词：航天器 模态 载荷叠加 薄壁加筋舱段结构 优化 

分 类 号：F407.5[经济管理—产业经济]