标题：Investigation on Lightning Thermal Damage Characteristics and Mechanism of Wind Turbine Blades Based on Molecular Dynamics [风机叶片材料雷击热损伤特性及损伤机制的分子动力学研究]
作者：Zhang L.; Jiang L.; Gai X.; Zhao T.; Zou L.
作者机构：[Zhang, L] School of Electrical Engineering, Shandong University, Jinan, Shandong 250061, China;[ Jiang, L] State Grid Yantai Power Supply Company, Y 更多
通讯作者地址：[Jiang, L] State Grid Yantai Power Supply CompanyChina;
来源：Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
关键词：Impact damage; Lightning damage; Mechanical damage; Molecular reaction dynamics; Pyrolysis damage; Wind turbine blade
摘要：With higher wind power penetration, wind turbines are stuck by lightning more seriously. The compositions of two kinds of materials of blades were calculated, based on which molecular models were built. Molecular dynamics was adopted for the research about lightning damage to analyze the pyrolytic damage, gas expansion damage and mechanical strength damage quantitatively. The results of molecular dynamics demonstrate that balsa has better thermal stability, weaker gas comprehensive impact damage and higher stiffness. Further, large current experiment for the two kinds of materials verified the results of molecular dynamics. However, due to low adhesion degree and porosity of balsa, the delamination is more obvious. In conclusion, compared with PVC, balsa is better at resisting to lightning strike. But it is necessary to improve the adhesiveness between the interlayer for weakening material delamination. © 2020 Chin. Soc. for Elec. Eng.