CAJ | 학술논문

为了模拟空间火工分离保护装置冲击载荷下的动力学特性，首先，建立了该保护装置的简化模型，计算得到火工分离体的初速度，推导了装置的冲击变形和变形能公式；保护装置分别采用2 A 12、TC4、蜂窝夹层材料，建立三种材料的多线性本构模型，采用显式动力学求解步分析其冲击响应特性，分析可知，蜂窝夹层材料具有最佳的能量吸收特性，2 A 12的能量吸收特性介于蜂窝夹层材料和TC4之间，其塑性变形量适中；应变能释放和冲击碰撞的耦合分析可知，应变能占比小，体现为振荡衰减的过程，结构的冲击响应特性主要由碰撞冲击导致；试验表明，该火工分离保护装置的瞬态动力学过程与分析一致，局部最大应力为302 MPa，冲击响应谱最大值为3242 g，满足有效载荷的可靠解锁分离要求。
위료모의공간화공분리보호장치충격재하하적동역학특성，수선，건립료해보호장치적간화모형，계산득도화공분리체적초속도，추도료장치적충격변형화변형능공식；보호장치분별채용2 A 12、TC4、봉와협층재료，건립삼충재료적다선성본구모형，채용현식동역학구해보분석기충격향응특성，분석가지，봉와협층재료구유최가적능량흡수특성，2 A 12적능량흡수특성개우봉와협층재료화TC4지간，기소성변형량괄중；응변능석방화충격팽당적우합분석가지，응변능점비소，체현위진탕쇠감적과정，결구적충격향응특성주요유팽당충격도치；시험표명，해화공분리보호장치적순태동역학과정여분석일치，국부최대응력위302 MPa，충격향응보최대치위3242 g，만족유효재하적가고해쇄분리요구。
In order to simulate the dynamic features of a pyrotechnic separation protecting device under explosion shock,firstly its simplified model was built,the initial velocity of the pyrotechnic separation body was calculated.The plastic deformation and deformation energy of the device under clamped boundary were derived.The protecting device adopted aluminum alloy,titanium alloy and honeycomb core material,the multi-linear constitutive models of the three materials were built.The analysis of impulse response was performed using the dynamic explicit method.The results showed that honeycomb core has the best energy absorption capability,and the energy absorption capability of aluminum alloy is between those of titanium alloy and honeycomb core,its plastic deformation is moderate.The coupling analysis of strain energy release and explosion shock indicated that the small proportion of strain energy reveals the process of oscillation decay;the impulse response characteristics of the structure are caused primarily by explosion shock.Tests showed that the transient dynamic process of the device is consistent with the analysis results,the local maximum stress is 302MPa,the maximum value of the shock response spectrum (SRS)is 3242g,and the requirements of the payload separation are satisfied.