近爆荷载下聚氯乙烯泡沫夹芯板的动力学模型研究  

A Dynamics Model of PVC Foam Sandwich Panels under Close-in Blast Loading

作　　者：赵猛 戴开达[1] 向召 姜涛[1] 赵晓松 徐豫新[1] ZHAO Meng;DAI Kaida;XIANG Zhao;JIANG Tao;ZHAO Xiaosong;XU Yuxin(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Beijing HIWING Scientific and Technological Information Institute,Beijing 100074,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]北京海鹰科技情报研究所,北京100074

出　　处：《兵工学报》2023年第12期3884-3896,共13页Acta Armamentarii

摘　　要：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。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.

关 键 词：聚氯乙烯泡沫夹芯板 近爆荷载 动态响应 动力学模型 数值计算 

分 类 号：O383[理学—流体力学]