Application of stress wave theory for pyroshock isolation at spacecraft-rocket interface

作     者：Xixiong WANG Tao YU Huipeng YAN Jifeng DING Zhen LI Zhaoye QIN Fulei CHU Xixiong WANG;Tao YU;Huipeng YAN;Jifeng DING;Zhen LI;Zhaoye QIN;Fulei CHU

作者机构：School of Electromechanical and Automotive EngineeringYantai UniversityYantai 264005China Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Xi’an Research Inst.of High-TechXi'an 710025China Beijing Institute of Spacecraft System EngineeringBeijing 100094China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第8期

页      面：75-86页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：supports from National Natural Science Foundation of China(No.11902286 and 11972204) 

主　　题：Finite element method Pyroshock isolation Spacecraft-rocket interface Stepped rod Stress wave transmission 

摘      要：A large number of pyroshock devices are employed in spacecraft and rockets to realize stage separation and appendage *** of pyroshock devices induces high-level transient shock responses which tend to cause fatal damages in electronic equipment made of crystals and brittle *** paper aims to provide methods to isolate pyroshock and guarantee the safety of such equipment against high-frequency ***,stress wave transmission mechanism in stepped rods is investigated,upon which optimal area rate for shock isolation is ***,two spacecraft-rocket interface structures for pyroshock isolation,namely isolation hole and interim segment,are *** numerical simulations and experiments are carried out to validate the two shock isolation *** is revealed that the interim segment structure shows better pyroshock isolation performance at the cost of increasing the weight of launching system whereas isolation hole is an optimal choice to reduce pyroshock response without causing weight increase.