弹架系统振动响应特性测试

摘要

为给空空导弹与发射装置的振动防护设计提供振动响应数据，本文选取GJB150规定的组合式外挂系统振动条件，对某型发射装置与空空导弹进行随机振动响应测试。采用前、后挂点两点平均值激励控制，得到发射装置6个测试点、导弹12个测试点的功率谱密度和均方根加速度响应值。试验结果表明：（1）发射装置与空空导弹每个位置上的振动响应随激励载荷的增大而增大。（2）发射装置靠近前后挂点的响应放大较小，前端后端放大较大，呈现双悬臂梁特征。（3）导弹除了2个测试点之外均小于激励载荷，呈现吸收能量的细长柔软弹性体特征，增大的测试点为弹体的振动模态响应结果。%In order to obtain vibration response data for air-to-air missile and launcher system design of anti-vibration, a random vibration response test on air-to-air missile and launcher system is implemented. A combined external stores random vibration condition of GJB150 standard is applied in the experimental test.By using the fore and hind support points mean value excitation, power spectrum density ( PSD) and root mean square ( RMS) acceleration of 6 test points on launcher and 12 test points on air-to-air missile are acquired.The experimental results show that:(1) Every test point vibration response on launcher and air-to-air missile increases with the increase of excitation load.(2) The response of launcher near fore and hind support points has a smaller amplification, and the amplification for front-end and back-end is larger, so that the launcher shows characteristic of double cantilever.(3) Except two test points, the others are less than excited load, showing the energy absorption characteristic of the slender and pliable elastic struc-ture, and the increasing test points are the result of vibration mode in response to the elastomer.