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工程力学  2015 

基于精确数值建模方法的自适应底座优化设计研究

DOI: 10.6052/j.issn.1000-4750.2014.05.0371

Keywords: 冷弹射,自适应底座,有限元数值模型,附加载荷,优化设计

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Abstract:

建立自适应底座的精确数值模型,对底座进行优化设计研究。推导了帘线拉伸模量修正公式,给出了橡胶材料Mooney-Rivilin模型相关参数计算方法;建立了底座精确数值模型,得到附加载荷数值解并与试验对比验证;推导了附加载荷的积分表达式,获得了影响附加载荷的4个主要参数;以4个主要参数为设计变量,定义附加载荷匹配弹重为优化目标,基于试验设计方法(DOE)和神经网络算法(RBF),建立了底座数学近似模型,结合多岛遗传算法(MIGA)获得了底座的优化设计方案。结果表明:优化后底座的附加载荷峰值与弹重差值减小至原差值的9.1%,导弹俯仰、偏航方向角位移分别下降了8.2%、15.8%。

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