光学小卫星蜂窝主承力板的设计与测试

发布时间：2018-05-29 00:56

本文选题：卫星 + 蜂窝板　；参考：《红外与激光工程》2016年12期

【摘要】：为了满足星载一体化光学小卫星对主承力板的刚度和重量要求,降低主承力板上各单机的动力学响应,对工程常用的蜂窝夹层板等效理论和动力学分析方法进行研究。首先,介绍了六边形蜂窝芯子的等效理论和考虑胶层的面板等效理论。建立了某星载一体化光学小卫星-Y向主承力板的有限元模型,以重量和动态刚度为目标,对蜂窝芯子参数进行优化分析。通过分析比较不同芯子蜂窝板的重量和刚度,最终选择壁厚为0.03 mm,边长为5 mm的蜂窝芯子。然后,在模态分析的基础上,对蜂窝主承力板进行正弦振动和随机振动分析。最后,进行相应的正弦振动和随机振动试验。分析与试验结果表明:一阶自然频率误差为1.9%;正弦加速度响应误差为4.5%;随机均方根加速度响应误差为3.7%。表明分析模型建立准确,参数等效合理,动力学响应分析准确,并且能满足卫星结构总体和各个星上单机对主承力板的动力学响应要求。
[Abstract]:In order to meet the requirement of stiffness and weight of spaceborne integrated optical small satellite to the main bearing plate and to reduce the dynamic response of each single machine on the main bearing plate, the equivalent theory and dynamic analysis method of honeycomb sandwich plate are studied. Firstly, the equivalent theory of hexagonal honeycomb core and the equivalent theory of panel considering rubber layer are introduced. The finite element model of a small spaceborne integrated optical satellite-Y bearing plate is established. The parameters of honeycomb core are optimized and analyzed with the aim of weight and dynamic stiffness. By analyzing and comparing the weight and stiffness of different core honeycomb panels, the honeycomb cores with a wall thickness of 0.03 mm and a side length of 5 mm were selected. Then, on the basis of modal analysis, sinusoidal vibration and random vibration analysis of honeycomb main bearing plate are carried out. Finally, the corresponding sinusoidal vibration and random vibration tests are carried out. The analysis and experimental results show that the first order natural frequency error is 1.9, the sinusoidal acceleration response error is 4.5 and the random root mean square acceleration response error is 3.7. It is shown that the analytical model is accurate, the parameters are equivalent and reasonable, the dynamic response analysis is accurate, and it can meet the requirements of the overall satellite structure and the dynamic response of each onboard single machine to the main bearing plate.
【作者单位】：中国科学院苏州生物医学工程技术研究所;中国科学院长春光学精密机械与物理研究所;中国科学院大学;
【基金】：国家863计划(2012AA121502)
【分类号】：V423.4

【相似文献】