高速列车夹层风挡的强冲击动力特性及温度效应研究

The research on the dynamic properties of high-speed train windshield under intense impact loading is a significant problem with immense strategic importance and remarkable academic value. The present project aims at the PVB/PU laminated glass windshield with new structural form of high-speed train. Through experimental investigation numerical simulation and theoretical analysis, the dynamic properties of laminated windshield under high-speed impact by birds, hails, stones and rigid solids is investigated systematically, taking the temperature effect and strain rate effect into account. The main research contents are as follows: The new experimental method for the dynamic properties of unorganic glass and PVB/PU and the reasonable constitutive model; Establishing the efficient testing platform and developing new numerical method to study the dynamic properties of high-speed train windshield under intense impact loading thoroughly, to reveal the energy-absorbing mechanism of PVB/PU laminated windshield and focus on the damage evolvement and the dynamic fracture of laminated glass. The current project attempts to establish, develop and improve the research method and means on the dynamic impacting properties of high-speed train windshield, to disclose the inherence connection between the material properties, structural forms and the impact resistance, energy-absorbing mechanism of high-speed train windshield, and ultimately achieve the optimum design of high-speed train windshield structure, to offer theoretical supports for the engineering applications, striving to advance the foundational and practical research standards for Chinese relevant industry.

高速列车风挡的强冲击动力特性的研究，是具有显著战略意义和学术价值的重要课题。本项目针对新构型高速列车PVB/PU夹层玻璃风挡，通过实验研究、数值模拟和理论分析，研究夹层风挡在鸟体、冰雹、石块、硬物等冲击物高速撞击下的冲击动力特性，计入对材料性能影响显著的温度效应和应变率效应。主要内容包括：无机玻璃和PVB/PU材料的动态力学性能测试新方法及本构模型研究；系统建立夹层玻璃抗冲击实验测试平台，提出高效的数值计算新方法，全面研究夹层风挡在鸟体、冰雹、石块、硬物等撞击下的强冲击动力特性，揭示夹层风挡的能量吸收机理，关注其损伤及其演化和最终破坏模式。本项目的研究试图建立、发展和完善夹层风挡强冲击动力特性的研究方法和手段，揭示材料性能、结构特性与夹层风挡抗冲击性能和机理的内在联系，最终实现夹层风挡结构的优化设计，为其工程应用提供理论指导，力图提升我国相关行业的基础和应用研究水平。

高速列车风挡的强冲击动力特性的研究，是具有显著战略意义和学术价值的重要课题。本项目针对新构型高速列车PU 夹层玻璃风挡，通过实验研究、数值模拟和理论分析，研究夹层风挡在鸟体、冰雹、石块、硬物等冲击物高速撞击下的冲击动力特性，计入对材料性能影响显著的温度效应和应变率效应。主要内容包括：透明玻璃和PU 材料的动态力学性能测试新方法及本构模型研究；系统建立夹层玻璃抗冲击实验测试平台，提出高效的数值计算新方法，全面研究夹层风挡在鸟体、冰雹、石块、硬物等撞击下的强冲击动力特性，揭示夹层风挡的能量吸收机理，关注其损伤及其演化和最终破坏模式。本项目的研究试图建立、发展和完善夹层风挡强冲击动力特性的研究方法和手段，揭示材料性能、结构特性与夹层风挡抗冲击性能和机理的内在联系，最终实现夹层风挡结构的优化设计，为其工程应用提供理论指导，力图提升我国相关行业的基础和应用研究水平。