冲击载荷下某发射装置动态特性分析及优化
Analysis and Optimization of Dynamic Characteristics of a Launcher Under Impact Load
为保证载具的稳定性和可靠性，针对某载具发射装置开展强激励下的动态响应分析。建立土壤-混凝土-载具结构的有限元模型，通过MATLAB和ABAQUS联合开发对模型的土壤边界批量施加黏弹性边界和地震动集中力载荷，对地表以CONWEP加载方式施加爆炸载荷，分别分析载具受到地震和爆炸载荷作用时的动态响应。结果表明，受地震和爆炸时装置的响应分别以水平和垂直方向为主，载具的垂直位移峰值均高于水平峰值但没有碰撞风险，载具倾角峰值均小于1°。结合麻雀搜索算法（SSA）、Mixup数据增强、BP神经网络对载具减振装置的刚度和阻尼参数进行优化设计，优化后的载具受到地震激励时水平加速度峰值下降14.9%，垂直相对位移峰值下降15.4%，研究可以为载具的减振优化工作提供参考。
In order to ensure the stability and reliability of a carrier, the dynamic response analysis of a launcher under strong excitation was analyzed. The finite element model of soil-concrete-carrier structure was established, and the viscoelastic boundary and seismic con-centrated force loads were applied in batch to the soil boundary of the model through the joint development of MATLAB and ABAQUS. The explosive strong excitation load is applied to the surface in CONWEP loading mode. The dynamic response of the carrier under earthquake and explosion load is analyzed respectively. The results show that the response of the device is mainly hori-zontal during earthquake and vertical during explosion. The peak vertical displacement of carrier is higher than that of the horizontal, but there is no collision risk. The peak carrier inclination are all less than 1°. Combined with Sparrow search algorithm (SSA), Mixup data enhancement and BP neural network, the stiffness and damping parameters of the carrier damping device are optimized. The peak value of horizontal acceleration and vertical relative displacement decreased by 14.9% and 15.4% respectively when the optimized vehicle was stimulated by earthquake. The research can provide reference for carrier vibration reduction optimization.
吴国澳;冯慧华;王硕纯;易晨坤;
北京理工大学 机械与车辆学院,北京 100081;北京理工大学 机械与车辆学院,北京 100081;中国电子科技集团公司第十八研究所,天津 300384;北京理工大学 机械与车辆学院,北京 100081;
Tu93
dynamic response strong disturbance excitation infinite field of soil neural network
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