摘要
为了研究太阳光照对夹层风挡玻璃吸能特性的影响,该文提出了太阳光照影响聚乙烯醇缩丁醛(PVB)中间层温度,进而影响夹层玻璃力学性能的光热—力学耦合仿真模型。对太阳光照下玻璃升温过程进行光热建模,将中间层温度结果通过动态力学分析(DMA)实验转化为PVB中间层模量,将其作为头模型—风挡玻璃碰撞有限元模型的输入,计算风挡玻璃的吸能能力和行人保护性能。结果表明:在夏天风挡玻璃透射太阳功率为700 W/m^(2)时,无风时中间层稳态温度将升高至70℃,中间层模量将下降为室温时的约1/500,头模型穿透风挡玻璃的临界速度将从室温实验测得的40 km/h降低为20 km/h。太阳光照将通过升高温度降低中间层模量,降低夹层风挡玻璃的吸能性能,增加头模型穿透玻璃以及与驾驶室内部物体发生二次碰撞的风险。
To study the effect of solar radiation on the energy absorption properties of laminated windshields,a photothermal-mechanical coupling simulation model was proposed,which took into account the effect of sunlight on the temperature of polyvinyl butyral(PVB)interlayer and the mechanical property of the laminated glass.This study conducted a photothermal modeling of the temperature rise of glass under sunlight,and converted the temperature results into PVB interlayer modulus using dynamic mechanical analysis(DMA)tests.The modulus was used as the input for the headform-windshield impact finite element model to calculate the energy absorption property and pedestrian protection property of the windshield.The results show that in summer,when the transmitted solar power of the windshield is 700 W/m^(2),the steady-state temperature of the interlayer increases to 70℃,the modulus of the interlayer decreases to about 1/500 of that at room temperature,and the critical speed of the headform penetrating the windshield decreases to 20 km/h from 40 km/h tested experimentally at room temperature.Solar radiation reduces the modulus of the interlayer by increasing the temperature of the interlayer,thus reducing the energy absorption performance of the laminated windshields,and increasing the risk of the head penetrating the windshield and having a secondary collision with objects inside the cabin.
作者
张沛霖
李一兵
ZHANG Peilin;LI Yibing(School of Vehicle and Mobility,Tsinghua University,Beijing 100084,China)
出处
《汽车安全与节能学报》
北大核心
2025年第4期558-567,共10页
Journal of Automotive Safety and Energy
基金
国家自然科学基金项目(11772176)。
关键词
夹层风挡玻璃
吸能特性
头模型冲击
太阳辐射
有限元分析
laminated windshield
energy absorption
headform impact
solar radiation
finite element analysis
