CAJ | 학술논문

为了研究星箭分离冲击环境特征和爆炸冲击对卫星的影响，以航天器中星箭包带式连接结构的某型爆炸切割器为研究对象，利用 LS-DYNA 显式动力学分析方法，建立了爆炸切割器爆炸切断过程的三维有限元模型，分析了爆炸切割过程中剪切刀的速度和加速度，讨论了连接杆上典型断裂单元上的应力应变变化和断裂特性，并分析了爆炸冲击载荷的特征和不同阶段切割器的结构响应特性。为航天器上爆炸切割器的爆炸断裂过程提供了一种数值仿真的方法，同时，也为星箭分离过程中产生的爆炸冲击环境模拟和预示提供了数值参考。
위료연구성전분리충격배경특정화폭작충격대위성적영향，이항천기중성전포대식련접결구적모형폭작절할기위연구대상，이용 LS-DYNA 현식동역학분석방법，건립료폭작절할기폭작절단과정적삼유유한원모형，분석료폭작절할과정중전절도적속도화가속도，토론료련접간상전형단렬단원상적응력응변변화화단렬특성，병분석료폭작충격재하적특정화불동계단절할기적결구향응특성。위항천기상폭작절할기적폭작단렬과정제공료일충수치방진적방법，동시，야위성전분리과정중산생적폭작충격배경모의화예시제공료수치삼고。
In order to reveal the shock characteristics and the influence of explosion on satellite during the separation process,the explosive cutters of clamp band system in spacecraft were taken as the research object.A three-dimensional finite element model for analyzing the cut-off process of the explosive cutters was established by use of the explicit dynamic software LS-DYNA.The speed and acceleration of shear knife in the process of explosion fracture were investigated.Here the change of stress and strain and fracture features of typical fracture units on the link were discussed. And the characteristics of the exploding shock loading and structural response characteristics of the cutter were analyzed in different stages.A method of numerical simulation for the fracture process of explosive cutters in spacecraft was provided, which can also be regarded as a reference to the simulation and presage of pyrotechnic shock environment in the process of satellite-rocket separation.