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赵猛 , 戴开达 , 向召 , 等 . 近爆荷载下聚氯乙烯泡沫夹芯板的动力学模型研究 [J ] . 兵工学报 , 2023 , 44 ( 12 ): 3884 - 3896 . DOI: 10.12382/bgxb.2022.0729 http://doi.org/10.12382/bgxb.2022.0729 为研究近爆荷载下聚氯乙烯(PVC)泡沫夹芯板动态响应,对PVC泡沫夹芯板变形的3个阶段进行分析,推导考虑面板局部化特征的变形挠曲面函数,建立了考虑面板和夹芯的弯矩和膜力效应对变形影响的单自由度刚塑性动力学模型。利用非线性数值计算软件,计算不同面板和夹芯厚度的PVC泡沫夹芯板在近爆荷载下的动态响应,分析面板变形和速度变化,验证了动力学模型中各阶段面板和夹芯的受力和运动情况。研究结果表明:建立的挠曲面函数能反映近爆荷载下面板的局部化特征,且在变形过程中面板的局部化程度不断减弱;基于动力学模型计算的面板中点挠度和速度时程曲线与数值计算结果较为吻合且面板中点挠度与实验结果误差较小,该动力学模型可以有效预测PVC泡沫夹芯板在近爆荷载下的动态响应。

ZHAO M , DAI K D , XIANG Z , et al . Study on dynamic model of PVC foam sandwich panel under near explosion load [J ] . Acta Armamentarii , 2023 , 44 ( 12 ): 3884 - 3896 . (in Chinese) DOI: 10.12382/bgxb.2022.0729 http://doi.org/10.12382/bgxb.2022.0729 Threedeformation stages of PVC foam sandwich panel are analyzed to study the dynamic response of polyvinyl chloride (PVC) foam sandwich panels under close-in blast loading. The deflection surface function is derived, which can reflect the localization characteristics of the panels under close-in blast loading. A single-degree-of-freedom rigid-plastic dynamics model is established, considering the effects of bending moment and membrane force on deformation of panels and core. The dynamic responses of PVC foam sandwich panels with different panel and core thicknesses under close-in blast loading are calculated using the nonlinear numerical calculation software, and the panel deformation and velocity variation are analyzed to verify the force and motion of the panels and core in each stage of the dynamic model. The result shows that the established deflection surface function can reflect the localization characteristics of panel under close-in blast loading, and the localization of panel decreases constinuously during the deformation process. The panel midpoint deflection and velocity-time curves based on the dynamics model fit well with the numerically calculated results, and the difference between the panel midpoint deflection and the experimental result is small. The dynamics model can be used to effectively predict the dynamic response of PVC foam sandwich panels under close-in blast loading.

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李富荣 , 荣吉利 , 王玺 , 等 . 水下爆炸载荷下金字塔夹芯板抗冲击性能及破坏模式研究 [J ] . 兵工学报 , 2023 , 44 ( 7 ): 1954 - 1965 . DOI: 10.12382/bgxb.2022.0147 http://doi.org/10.12382/bgxb.2022.0147 研究金属夹芯板在水下爆炸冲击下的动态响应和抗冲击性能,对提升舰船防护能力有重要意义。利用等效水下爆炸冲击加载实验装置对金字塔点阵夹芯板进行实验,得到其动态响应规律;结合Abaqus流-固耦合仿真对实验进行计算,结果与实验误差较小,验证了仿真的有效性,得到了金字塔夹芯板动态响应的三个阶段特征。通过后面板变形和芯层塑性吸能评估了夹芯板的抗冲击性能。针对不同参数的夹芯板,利用仿真分析了其不同的破坏模式;利用多目标优化方法对金字塔芯层参数进行优化。研究结果表明:夹芯板面板总厚度一定时,拥有较薄前面板和较厚后面板的夹芯板抗冲击性能更强;不同粗细的金字塔杆件组成的芯层破坏模式不同,但后面板变形相近;芯层的塑性吸能占比随着冲击载荷的增大而减小;优化后的夹芯板抗冲击性能显著提升,优化结果对金字塔夹芯板的设计具有指导意义。

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韦辉阳 , 荣吉利 , 韦振乾 , 等 . 预置裂纹靶板在水下冲击波作用下的动态响应研究 [J ] . 兵工学报 , 2019 , 40 ( 11 ): 2250 - 2258 . DOI: 10.3969/j.issn.1000-1093.2019.11.009 http://doi.org/10.3969/j.issn.1000-1093.2019.11.009 舰船结构在生产和使用过程中不可避免地会出现划痕、凹槽等损伤，使结构的水下抗毁伤性能出现不同程度的降低。利用非药式等效水下冲击加载装置，对预置裂纹靶板进行了水下冲击加载实验，通过高速相机对靶板变形进行记录；结合ABAQUS仿真软件对加载实验进行计算，对预置裂纹靶板在水下冲击载荷作用下的动态响应机制进行研究，得出了“3阶段”动态响应现象结论；对不同预置裂纹形状靶板进行研究，发现不同预置裂纹形状靶板的动态响应差别在于最终破坏阶段，靶板破坏倾向于出现最少裂缝情况下，将能量全部释放。对裂纹参数进行研究，结果表明：预置裂纹靶板离面位移与载荷冲量近似呈线性关系，随着裂纹深度和长度的增长，结构剩余冲击强度不断下降。

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