摘要
柔性气缸弹射作为一种新型弹射方法,具有红外目标隐蔽,能量输出稳定等优点。为解决柔性气缸弹射过载较大、响应时间较长的问题,进一步提高弹射响应速度和弹射稳定性,引入了一种代理模型优化方法对柔性气缸弹射过程进行优化,旨在减小弹射过载并提升弹射速度。基于代理模型理论,建立柔性气缸弹射代理模型,对代理模型进行精度分析,在此基础上,深入探究了充气孔直径、开启时间以及开启时长这三个关键参数对弹射动力学响应的具体影响。结合NSGA-Ⅱ(non-dominated sorting genetic algorithm II)优化算法,对弹射模型的相关参数进行了优化处理。研究结果显示:采用粒子法的有限元模型能够精确模拟柔性气缸的弹射过程;进一步的分析表明,相较于响应面模型Kriging代理模型在替代柔性气缸有限元模型方面展现出了更高的准确性。针对初始设计点,提出了通过NSGA-Ⅱ算法优化的均衡设计方案,该方案成功地将弹射速度提升了4.79%,同时将弹射过载降低了21.70%;并针对弹射速度与最大过载的优化过程给出了优化方案。
As a new type of ejection method,flexible cylinder ejection has advantages of infrared target concealment and stable energy output.Here,to solve problems of larger overload and longer response time of flexible cylinder ejection,and further improve ejection response speed and ejection stability,a surrogate model optimization method was proposed to optimize ejection process of flexible cylinder,reduce ejection overload and improve ejection speed.Based on the surrogate model theory,a flexible cylinder ejection surrogate model was established,and the model’s accuracy was analyzed.Then,specific effects of 3 key parameters of diameter of inflation hole,opening time and opening duration on ejection dynamic response were deeply explored.Relevant parameters of the ejection model were optimized using the optimization algorithm called non-dominated sorting genetic algorithm II(NSGA-II).The study results showed that the finite element model using the corpuscular method can accurately simulate ejection process of flexible cylinder;however,compared to the response surface model,Kriging surrogate model exhibits higher accuracy in replacing the finite element model of flexible cylinder;aiming at initial design points,a balanced design scheme optimized with NSGA-II was proposed by authors,this scheme can successfully increase the ejection speed by 4.79%and reduce the ejection overload by 21.70%;an optimization scheme is proposed for optimization processes of ejection speed and maximum overload.
作者
王卓越
杨宝生
姜毅
杨哩娜
王汉平
WANG Zhuoyue;YANG Baosheng;JIANG Yi;YANG Lina;WANG Hanping(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《振动与冲击》
北大核心
2025年第9期99-108,共10页
Journal of Vibration and Shock
基金
国防基础科研计划(JCKY2021602B030)。
关键词
粒子法
柔性气缸弹射
Kriging代理模型
NSGA-Ⅱ算法
corpuscular method
flexible cylinder ejection
Kriging surrogate model
non-dominated sorting genetic algorithm II(NSGA-II)
