首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Application of stress wave theory for pyroshock isolation at spacecraft-rocket interface
Institution:School of Electromechanical and Automotive Engineering,Yantai University,Yantai 264005,China;Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China;Xi'an Research Inst.of High-Tech,Xi'an 710025,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China
Abstract:A large number of pyroshock devices are employed in spacecraft and rockets to realize stage separation and appendage deployment. Release of pyroshock devices induces high-level transient shock responses which tend to cause fatal damages in electronic equipment made of crystals and brittle materials. This paper aims to provide methods to isolate pyroshock and guarantee the safety of such equipment against high-frequency shocks. Firstly, stress wave transmission mechanism in stepped rods is investigated, upon which optimal area rate for shock isolation is achieved. Then, two spacecraft-rocket interface structures for pyroshock isolation, namely isolation hole and interim segment, are proposed. Both numerical simulations and experiments are carried out to validate the two shock isolation strategies. It 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.
Keywords:Finite element method  Pyroshock isolation  Spacecraft-rocket interface  Stepped rod  Stress wave transmission
本文献已被 万方数据 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号