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热载荷蜂窝夹层板作用下固有频率预测与分析
黄帆1,2, 陈昌亚1,2
1.上海卫星工程研究所, 上海 200240;2.上海市深空探测技术重点实验室, 上海 200240
摘要:
针对热载荷作用下蜂窝夹层板固有频率变化的问题,分析了蜂窝夹层板在热载荷作用下的应力分布及固有频率,并根据应力分布预测了夹层板的固有频率变化,与仿真得到的频率变化一致。仿真结果表明:碳纤维蒙皮蜂窝夹层板在热载荷作用下的固有频率基本不变,且约束形式对频率变化的影响很小;铝合金蒙皮蜂窝夹层板在热载荷作用下时,约束形式对频率变化影响很大,当约束较少时频率基本保持不变,当约束较多时将引起结构固有频率大幅下降。
关键词:  蜂窝夹层板;热载荷;固有频率;应力分布
DOI:10.15982/j.issn.2095-7777.2015.04.012
分类号:
基金项目:上海市重点实验室项目(13dz2260100);中国科学院空间科学战略先导科技专项(XDA04060900)
Natural Frequency Prediction and Analysis of Honeycomb Sandwich Plate with Thermal Load
HUANG Fan1,2, CHEN Changya1,2
1.Shanghai Institute of Satellite Engineering, Shanghai 200240, China;2.Laboratory of Deep Space Exploration, Shanghai 200240, China
Abstract:
The stress distribution and natural frequency changing of honey comb sand wich plate is proposed in this paper with thermal load, and the natural frequency of honey combs and wich plate is predicted according to the stress distribution. The simulation results show that the natural frequency of honey combs and wich plate with carbon fiber skin is essentially the same with thermal load, and the constraint effect to the frequency change is very small. The frequency of honey combs and wich plate with aluminum alloy skin with thermal load changes greatly when constraint form changes, and the frequency is essentially the same with a small amount of constraint, and the major constraint will cause the frequency decreasing dramatically.
Key words:  honey comb sand wich plate;thermal load;natural frequency;stress distribution