基于蜂窝加肋板结构参数匹配抑制光学卫星随机响应

发布时间：2018-04-12 10:20

本文选题：光学卫星 + 蜂窝板　；参考：《光学精密工程》2016年02期

【摘要】：以结构参数的最优匹配为设计目标,提出了一种改善光学卫星振动环境的新思路。针对某光学卫星振动试验中出现的蜂窝顶板随机振动响应过大的问题,研究了加强肋在降低简支蜂窝板随机振动响应中的作用。分析了该光学卫星蜂窝板结构的特点,探讨了它的随机载荷以及在其激励下蜂窝板式结构的动力学响应。结合卫星自身结构上的需要,提出了一种通过添加特定截面H型加强肋的方法来降低蜂窝板的响应。利用有限元法对外形尺寸为1 000mm×1 000mm×30mm的蜂窝板模型进行随机振动分析验证,结果显示:H型加强肋能显著降低蜂窝板的振动响应,有明显减振效果。最后,根据整星振动试验结果对卫星力学模型进行了修正,并利用该方法对修正后的模型进行动力学分析和优化,分析结果表明顶板响应降幅达到了40%,为系统可接受范围,证明了提出的方法很好地抑制了结构的随机振动响应。
[Abstract]:A new idea to improve the vibration environment of optical satellite is proposed with the optimal matching of structural parameters as the design goal.Aiming at the problem that the random vibration response of honeycomb roof is too large in the vibration test of an optical satellite, the effect of strengthening rib on reducing the random vibration response of simply supported honeycomb plate is studied.The characteristics of the honeycomb plate structure of the optical satellite are analyzed, its random load and the dynamic response of the honeycomb plate structure under its excitation are discussed.According to the need of satellite structure, a method of reducing the response of honeycomb plate by adding H-shaped stiffener with special section is proposed.The finite element method is used to verify the random vibration analysis of the honeycomb plate model with the shape size of 1 000mm 脳 1 000mm 脳 30mm. The results show that the beehive stiffener can significantly reduce the vibration response of the honeycomb plate and has obvious damping effect.Finally, the satellite mechanical model is modified according to the results of the whole satellite vibration test, and the dynamic analysis and optimization of the modified model are carried out by using this method. The analysis results show that the reduction of the roof response reaches 40 percent, which is the acceptable range of the system.It is proved that the proposed method can suppress the random vibration response of the structure well.
【作者单位】：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836高技术研究发展计划资助项目(No.2012AA121502)
【分类号】：V414

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