工程与试验
工程與試驗
공정여시험
ENGINEERING & TEST
2014年
2期
23-25,63
,共4页
聚氨酯灌封材料%灌封结构%抗冲击%有限元仿真%应力分析
聚氨酯灌封材料%灌封結構%抗遲擊%有限元倣真%應力分析
취안지관봉재료%관봉결구%항충격%유한원방진%응력분석
polyurethane sealing materials%sealing structure%shock resistance%finite element sim-ulation%stress analysis
为保证武器系统内部灌封电路在高冲击和强振动环境下可以更好工作,以武器系统中常使用的聚氨酯灌封材料为例,对印刷电路板分别水平、倾斜、垂直姿态进行灌封。利用有限元分析软件 LS-DYNA,分析高冲击条件下不同灌封结构中电路板的应力特征,以及随冲击值的增加最大应力单元的变化情况。试验结果表明,电路板摆放方向与冲击加速度方向平行时,应力值小于其他摆放姿态；随着冲击值的增加,最大应力单元会发生偏移。
為保證武器繫統內部灌封電路在高遲擊和彊振動環境下可以更好工作,以武器繫統中常使用的聚氨酯灌封材料為例,對印刷電路闆分彆水平、傾斜、垂直姿態進行灌封。利用有限元分析軟件 LS-DYNA,分析高遲擊條件下不同灌封結構中電路闆的應力特徵,以及隨遲擊值的增加最大應力單元的變化情況。試驗結果錶明,電路闆襬放方嚮與遲擊加速度方嚮平行時,應力值小于其他襬放姿態；隨著遲擊值的增加,最大應力單元會髮生偏移。
위보증무기계통내부관봉전로재고충격화강진동배경하가이경호공작,이무기계통중상사용적취안지관봉재료위례,대인쇄전로판분별수평、경사、수직자태진행관봉。이용유한원분석연건 LS-DYNA,분석고충격조건하불동관봉결구중전로판적응력특정,이급수충격치적증가최대응력단원적변화정황。시험결과표명,전로판파방방향여충격가속도방향평행시,응력치소우기타파방자태；수착충격치적증가,최대응력단원회발생편이。
In order to ensure the internal sealing circuit of weapon system can work more reliable in high shock and vibration environment,the sealing materials often used in weapon system are se-lected as the research object,for example Polyurethane.Printed circuit boards are sealed with different postures (horizontal position,inclined position and vertical position).The strain charac-teristics of printed circuit board in high shock are analyzed using FEA (Finite Element Analysis) software platform LS-DYNA,and the maximum stress element of circuit boards are influenced as change impact value.The results show that,if the position of circuit board is parallel to the di-rection of shock acceleration,the stress of circuit board is less than other positions,and the posi-tion should be advocated in practice.The maximum stress element will change with the impact in-creasing.
