聚氨酯填充发泡对旋塑塑料车身正面碰撞安全性能的影响  

Effect of Filling Polyurethane Foam on Frontal Impact Safety Performance of Rotary Plastic Vehicle Body

作　　者：熊元[1,2,3] 张有忱[1,3] 秦柳[1,2,3] 虞华春 杨卫民[1,2,3] 

机构地区：[1]北京化工大学,北京100029 [2]宁波格林关孚新材料科技有限公司,浙江慈溪315300 [3]汽车塑化装备制造重点实验室,北京100029

出　　处：《塑料》2015年第6期107-110,共4页Plastics

摘　　要：针对旋塑塑料电动汽车结构中空、材料强度弱及碰撞吸能能力较差的特点,以提高其正面碰撞结构耐撞性能为目标,结合聚氨酯泡沫质量轻、冲击吸能性能好及易于加工成型的优势,运用旋塑模塑发泡工艺实现全塑车身用聚氨酯填充发泡的优化设计。由于聚氨酯泡沫种类繁多,为了选择合适的填充类型,利用有限元仿真软件ANSYS/LSDYNA,分别从车身变形量、碰撞内能吸收能力及车身加速度三个方面对比分析硬质聚氨酯和软质聚氨酯对全塑车身正面碰撞安全性能的影响。结果表明:软质聚氨酯对旋塑塑料电动汽车正面碰撞结构耐撞性能提高,效果更加显著。Since rotating plastic electric vehicle with the feature of hollow structure, weak material strength and poor collision energy absorbing ability, it necessary to enhance its frontal impact crashworthiness performance. Combined with the advantages of light weight, good impact energy absorption performance and easy processing molding, the polyurethane foam used to fill in the all-plastic vehicle body by rotating plastic foam molding process as the optimal design. Due to the variety types of polyurethane foam, the finite element simulation software ANSYS / LS-DYNA used to screen the appropriate type. Then the effect of rigid polyurethane and flexible polyurethane on the frontal crash safety performance of the plastic vehicle body analyzed in parallel from the aspects of the deformation of the body, energy absorption ability and collision acceleration of the body, respectively. The results showed that the flexible polyurethane outperform rigid polyurethane in promoting the rotary plastic electric vehicle frontal impact crashworthiness performance.

关 键 词：新能源电动车 旋塑塑料车身 聚氨酯泡沫 ANSYS/LS-DYNA 正面碰撞 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]