光电稳瞄系统内框架动力学模型修正方法研究

发布时间：2019-01-18 08:15

【摘要】：为提高光电稳瞄系统内框架结构动力学模型准确度和仿真分析效率,提出了基于多种群遗传退火算法的结构动力学模型修正方法。以某光电稳瞄系统内框架为研究对象,通过动力子结构法建立有限元模型,对比模态测试结果,采用多种群遗传退火算法及相关性分析对有限元模型进行修正,得到全局优化下内框架轴承的六向刚度值,并对修正后的模型进行了实验验证。结果表明,有限元模型与实验结果能较好地匹配,各阶模态相关性在0.8以上,频率误差在9.05%以内,计算效率提高95%以上。最终形成了高效可行的模型修正方案,为光电稳瞄系统内框架结构设计提供了重要的参考。
[Abstract]:In order to improve the accuracy and efficiency of simulation and analysis of the dynamic model of the frame structure in the photoelectric stabilized and aiming system, a modified method of structural dynamics model based on multi-population genetic annealing algorithm is proposed. The finite element model is established by dynamic substructure method. The finite element model is modified by genetic annealing algorithm of multiple populations and correlation analysis. The six-direction stiffness of the inner frame bearing is obtained under global optimization, and the modified model is verified experimentally. The results show that the finite element model can well match the experimental results, the correlation of each order mode is more than 0.8, the frequency error is less than 9.05%, and the calculation efficiency is improved by more than 95%. Finally, an efficient and feasible model modification scheme is formed, which provides an important reference for the design of the frame structure of the photoelectric stabilized sight system.
【作者单位】：西安应用光学研究所;
【基金】：国防基础科研计划资助(A0920132001) “十二五”兵器预研支撑基金项目(62201070139) 高等院校协同创新合作专项项目(KH201504)
【分类号】：TJ5;TP18

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