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针对广角极光成像仪整机Z向冲击试验后探测器损坏的问题,提出在镜头组件与头部框架间设置隔振器的解决方法。首先,确定隔振方案为被动局部隔振;然后,从材料、刚度和安装方式等方面完成金属橡胶隔振器的设计。接着,运用有限元方法对结构进行模态分析和冲击载荷响应仿真分析。最后,对广角极光成像仪整机产品进行了力学实验,实验结果与仿真分析结果一致。实验结果显示:安装隔振器后,探测器位置测点的正弦振动加速度响应最大降低了26.2%,随机振动加速度响应最大降低了72%,冲击加速度响应最大降低了48%,说明该隔振器具有显著的减振效果。在实验完成后对产品进行检测,发现产品并无异常,说明结构设计满足要求。
Aiming at the problem of detector damage after the Z-direction impact test of the wide-angle auroral imager, a solution of setting the vibration isolator between the lens assembly and the head frame is proposed. First of all, it is determined that the vibration isolation scheme is passive local vibration isolation; then, the design of metal rubber vibration isolator is completed from the aspects of materials, stiffness and installation methods. Then, the finite element method is used to analyze the modal analysis and impact load response of the structure. Finally, a mechanical experiment is carried out on the whole product of the wide-angle auroral imager. The experimental results are consistent with those of the simulation analysis. The experimental results show that the vibration response of the detector at the measuring point is reduced by 26.2% at maximum, the maximum random vibration acceleration response is reduced by 72% and the impact acceleration response is reduced by 48% at maximum, which shows that the vibration isolator Has a significant damping effect. After the experiment is completed, the product is tested and the product is found to be normal, indicating that the structural design meets the requirements.