摘要
提高新型运载火箭发射的自动化程度需要采用大量电磁类阀门自动器,而电磁力的计算是电磁阀设计中的重要环节。介绍了3种计算直流螺线管式电磁铁电磁吸力的工程方法,即经验公式法、磁路分割法和有限元方法。通过工程实例比较了3种方法的计算特点,包括计算难易程度、计算精度等。由于采用有限元方法可以考虑磁性材料的非线性特性及磁路的漏磁效应,因此磁力计算结果较为精确,适宜在工程设计中推广应用。
Solenoid valves play an important role in the propulsion system of a launch vehicle, especially for highly automatic launching. Three methods of electromagnetic force calculation are presented, including empirical equations, division of magnetic path and FEM. Comparisons between these 3 methods are performed with an engineering example. The FEM is more suitable than other 2 methods because it can take the magnetic leakage and the nonlinear property of the material into account.
出处
《导弹与航天运载技术》
北大核心
2007年第1期40-45,共6页
Missiles and Space Vehicles
关键词
运载火箭
电磁阀
电磁力
有限元方法
Launch vehicle
Solenoid valve
Electromagnetic foree
FEM
