水下爆炸载荷作用下梯度PVC泡沫夹芯结构的动态响应

郭军1,李旭阳1,王计真1,张欣玥1,杨丽红2

振动与冲击 ›› 2023, Vol. 42 ›› Issue (22) : 112-120.

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (22) : 112-120.
论文

水下爆炸载荷作用下梯度PVC泡沫夹芯结构的动态响应

  • 郭军1,李旭阳1,王计真1,张欣玥1,杨丽红2
作者信息 +

Dynamic response of a graded PVC foam sandwich panel subjected to underwater explosion load

  • GUO Jun1,LI Xuyang1,WANG Jizhen1,ZHANG Xinyue1,YANG Lihong2
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摘要

采用ANSYS/LS_DYNA有限元软件对分层梯度PVC泡沫夹芯板在水下爆炸载荷作用下的动态响应进行了数值分析。针对表观密度为79 kg/m3、107 kg/m3、134 kg/m3、162 kg/m3、203 kg/m3、252 kg/m3的六种泡沫材料,通过改变不同泡沫芯层的密度实现不同的密度梯度设置,共设计了两类不同密度梯度跨度的构型。选用背板峰值挠度和能量吸收作为结构抗水爆性能评价指标,讨论了不同密度梯度比对结构动态响应的影响,并与均质构型进行了比较。结果表明,与均质构型相比,合理的设置泡沫芯层密度能够有效地提升结构的抗爆性能;芯层的密度梯度设置对大密度梯度LGD构型的影响大于小密度梯度SGD构型;小密度梯度构型LGD-3具有最小的背板峰值挠度,为设计优质抗水爆性能泡沫夹芯板提供了参考。

Abstract

The dynamic response of the hierarchical gradient PVC foam clamping plate underwater explosion load was numerically analyzed using ANSYS / LS_DYNA. For six foams with a density of 79 kg / m3, 107 kg / m3, 134 kg / m3, 162 kg / m3, 203 kg / m3, 252 kg / m3, by changing the density of different foam core layers Density gradient settings have been designed with two types of different density gradient spans. The backplane peak deflection and energy absorption are selected as the structural anti-water explosion performance evaluation index, which discusses the influence of different density gradient alignment structural dynamic responses, and compared with homogeneous configurations. The results show that the reasonable setting of the foam core layer density can effectively improve the explosion resistance of the structure; the density gradient of the core layer is greater than the high-density gradient LGD configuration is greater than the small-density gradient SGD configuration. Small-density gradient configuration LGD-3 has the smallest back plate peak deflection, providing a reference for designing high quality anti-water explosion performance foam sandwich panels.

关键词

夹芯结构 / PVC泡沫 / 分层梯度 / 水下爆炸

Key words

sandwich structure / PVC foam / layered gradient / underwater explosion

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郭军1,李旭阳1,王计真1,张欣玥1,杨丽红2. 水下爆炸载荷作用下梯度PVC泡沫夹芯结构的动态响应[J]. 振动与冲击, 2023, 42(22): 112-120
GUO Jun1,LI Xuyang1,WANG Jizhen1,ZHANG Xinyue1,YANG Lihong2. Dynamic response of a graded PVC foam sandwich panel subjected to underwater explosion load[J]. Journal of Vibration and Shock, 2023, 42(22): 112-120

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